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Silicosis Radiology

Silicosis Radiolog

  1. ing industries in the north central part of the United States over a period of about ten years. It has not been found possible to apply all the information obtained from various articles and discussions on silicosis to conditions existing in the area.
  2. antly in the upper lobes. Numerous lymph node eggshell calcifications are present. From the case: Silicosis. CT
  3. Criteria for the diagnosis of silicosis are (1) appropriate exposure history, (2) radiologic findings consistent with silicosis, and (3) absence of other diseases to explain the radiologic findings. Simple silicosis refers to cases in which small silicotic nodules (<10 mm) are present and larger, conglomerate opacities are not demonstrated. It occurs in 10-20% of exposed workers
  4. ance

Silicosis and CWP are virtually indistinguishable radiologically. The chest radiograph remains the foremost imaging modality by which silicosis and CWP are diagnosed, and disease progression is monitored CT findings in Silicosis: Small well-defined nodules of 2 to 5mm in diameter in both lungs. Upper lobe predominance Nodules may be calcified Centrilobular and subpleural distribution Sometimes random distribution Irregular conglomerate masses, known as progressive massive fibrosis Often hilar and mediastinal lymphnodes In a study of former denim sandblasters, chest radiographic evidence of silicosis was found in 77 of 145 subjects . Other newly recognized occupational groups at risk for silicosis include goldworking jewelers and electric cable manufacturers . Centrilobular and perilymphatic nodules are characteristic of silicosis Silicosis: Silicosis features a diffuse micronodular lung disease with an upper lobe predominance Respiratory Therapy Respiratory System Radiology Imaging Internal Medicine Nurse Practitioner Light In The Dark Anatomy Pharmacy Health Silicosis, PMF, progressive, massive, fibrosi

Silicosis and Coal worker pneumoconiosis (CWP) are pathologically distinct entities with differing histology, resulting from the inhalation of different inorganic dusts. The radiographic and HRCT appearances of these diseases, however, may not be distinguishable from each other and may be similar to sarcoidosis silicosis had radiological evidence of pro-gression. From the initial radiographs, 24 (31.6%) of those with radiological profu-sion category 1, 15 (37.5%) of those with radiological profusion category 2, and 13 (52%) of those with complicated silicosis (including all seven with category 3 profu-sion of small opacities) showed radiologi-cal progression Silicosis, radiological findings in Chest radiograph and MDC . Silicosis is a fibrotic lung disease caused by inhalation of free crystalline silicon dioxide or silica. Occupational exposure to respirable crystalline silica dust particles occurs in many industries Silicosis is a disease characterized by nodular fibrosis of the lung, caused by the inhalation and deposition in the lung of particles of crystalline quartz (SlO 2) in the respirable size range (generally below 5 μm and certainly below 8 μm in diameter). Naturally occurring quartz is often referred to as alpha quartz

Silicosis Radiology Case Radiopaedia

D. Silicosis LearningRadiology.com is an award-winning, non-commercial site aimed primarily at medical students and radiology residents-in-training, containing lectures, handouts, images, Cases of the Week, archives of case quizzes, flashcards of differential diagnoses and most commons lists, primarily in the areas of chest, GI, cardiac, and bone radiology Silicosis is a form of occupational lung disease caused by inhalation of crystalline silica dust. It is marked by inflammation and scarring in the form of nodular lesions in the upper lobes of the lungs. It is a type of pneumoconiosis. Silicosis is characterized by shortness of breath, cough, fever, and cyanosis. It may often be misdiagnosed as pulmonary edema, pneumonia, or tuberculosis. Silicosis resulted in at least 43,000 deaths globally in 2013, down from at least 50,000 deaths in 1990. Th Silicosis is a pneumoconiosis caused by inhalation of dust containing silica. The diagnosis of this entity requires the combination of an appropriate history of silica exposure and characteristic image findings. Silicosis is the most common occupational disease involving the lungs

124 Silicosis Radiology Ke

  1. Silicosis  small, well-circumscribed nodules that are 2-5 mm in dia, mainly inv upper & posterior lung zones.  GGO  20% calcify centrally  Lymphadenopathy is common  Eggshell calcification of hilar nodes (5%) DDx: Sarcoidosis 9
  2. antly in the upper lobes with mediastinal widening consistent with mediastinal lymphadenopathy, do
  3. Accelerated silicosis is a form of silicosis which develops with a shorter duration (less than 10 years) but higher intensity of silica exposure than chronic silicosis. Accelerated silicosis has been poorly described, but is the most typical form associated with artificial stone work 1, 2, 3
  4. The patient's initial symptoms were progressive cough, dyspnoea and weight loss. Given his occupational history, typical clinical manifestations and radiological findings, an initial diagnosis of accelerated silicosis was proposed and histologically confirmed. The patient was a candidate for lung transplantation

(4)Department of Radiology, Canterbury and West Coast Hospitals, Christchurch, New Zealand. Silicosis in artificial stone workers has become increasingly recognised in Australia over the last two years, with a large proportion of screened workers showing imaging features of the disease Silicosis is often confused with post primary tuberculosis due to radiological resemblance, and it is common to develop tuberculosis in silicotic patients. The differentiating features are (a) in silicosis, primarily, there is increase of bronchovascular markings followed by rounded opacities, whereas in tuberculosis rounded opacities appear.

LearningRadiology - Silicosi

  1. Silicosis refers to a spectrum of pulmonary diseases caused by inhalation of free crystalline silica (silicon dioxide). The written record of occupational lung disease caused by silica inhalation extends back to ancient Egypt and Greece. Despite a clear understanding of how to prevent this disease, new cases of silicosis continue to occur [ 1-6 ]
  2. Pneumoconiosis (silicosis) 1. Mohammad Tohidi M.D. Professor of Internal Medicine Department of Pulmonary Medicine Ghaem Hospital MUMS Mashhad IRAN. 2. SilicosisSilicosis . 3. Case Scenario (1Case Scenario (1 ( ( 57 year old retired non-smoker man57 year old retired non-smoker man referred with the cc of dry cough forreferred with the cc of dry.
  3. The classic radiological sign of simple silicosis is a bilateral diffuse nodular pattern (opacities 1 cm), with greater upper lobe and posterior involvement. The simple form may progress to complicated silicosis (defined as presence of opacities >1 cm) in a process of nodular conglomeration, parenchymal retraction and paracicatricial emphysema
  4. The classic radiological sign of simple silicosis is a bilateral diffuse nodular pattern (opacities <1 cm), with greater upper lobe and posterior involvement. The simple form may progress to complicated silicosis (defined as presence of opacities >1 cm) in a process of nodular conglomeration, parenchymal retraction and paracicatricial emphysema.
  5. ation to complicated silicosis that most fre-presents with dyspnea and cough. The classic radiological of simple silicosis is a bilateral diffuse nodular pattern (opac-<1cm), with greater upper lobe and posterior involvement. simple form may progress to complicated silicosis (dened a

Radiology Notes. My notes during radiology residency, fellowship, and beyond Silicosis Imaging of occupational lung disease. Radiographics. 2001 Nov-Dec;21 (6):1371-91; Shida H, Chiyotani K, Honma K, et al. Radiologic and pathologic characteristics of mixed dust pneumoconiosis. Radiographics. 1996 May;16 (3):483-98. Dee P, Suratt P, Winn W Artificial stone-associated silicosis: clinical-pathological-radiological correlates of disease. Levin K, McLean C, Hoy R. Respirol Case Rep, 7(7):e00470, 16 Aug 2019 Cited by: 2 articles | PMID: 31428428 | PMCID: PMC6696906. Free to read & us

Silicosis and Coal Workers' Pneumoconiosis Radiology Ke

Study Design and Methods. Between 2009 and 2018, a total of 106 patients were diagnosed with artificial stone silicosis in the Bay of Cádiz area (southern Spain), 14.15% by using biopsy results and the remainder according to chest radiography and high-resolution CT imaging Silicosis is a potentially fatal, irreversible, fibrotic pulmonary disease that may develop subsequent to the inhalation of large amounts of silica dust over time. In most circumstances, silicosis only develops subsequent to substantial occupational exposures. The disease has a long latency perio The initial chest X-ray was abnormal in all six cases with radiological evidence of silicosis (International Labour Office profusion category ≥1/1) on imaging, and all had evidence of silicosis on high-resolution computed tomography (HRCT). Three patients had already progressed to progressive massive fibrosis on HRCT scanning at the time of. One third to a half of patients with silicosis in two studies were found to have radiologic progression by two or more steps on the 12-point scale of the ILO standard, with appreciable decline in lung function in 7 to 10 years (2, 3).Rapidly progressive pneumoconiosis (RPP) is defined as an increase in chest radiograph profusion by one ILO subcategory in less than 5 years (4, 5) JORNADA: Presentación del nuevo Protocolo de Vigilancia específica: silicosis SILICOSIS. Casos clínicos López Guillén A1-2, Rovira Sans S1 1 4lar-Laboral Advanced Radiology 2 Unitat de Medicina Legal, Medicina del Treball i Toxicología. Departament de Medicina. Facultat de Medicina i Ciències de la Salut. Universitat de Barcelona 2021/05/1

Silicosis- CT Findings - Sumer's Radiology Blo

  1. Diagnosis of silicosis. Radiology . A chest x-ray is an initial test performed to screen for silicosis. In chronic silicosis, a chest x-ray may show tiny round opacities (nodules), generally in the upper zones of both lungs. Such radiographic findings are found generally 15 to 20 years following exposure
  2. The clinical and radiological features are similar to chronic silicosis. Chronic silicosis typically develops 10 to 30 years after exposure to lower levels of silica dust. It is characterised by the formation of silicotic nodules greater than 1 cm in diameter; these nodules can coalesce and lead to progressive massive fibrosis of the lung
  3. Silicosis is a fibrotic lung disease caused by inhalation of free crystalline silicon dioxide or silica. Occupational exposure to respirable crystalline silica dust particles occurs in many industries. Phagocytosis of crystalline silica in the lung causes lysosomal damage, activating the NALP3 inflammasome and triggering the inflammatory cascade with subsequent fibrosis
  4. ant distribution on chest radiology. Patients may be asymptomatic, although up to 70% of patients in some case series report exertional dyspnoea, chronic cough and sputum production. 9 Silicotic nodules may coalesce to form.
  5. ers who had, on average, 2.7 years between the radiological and pathological exa

Silicosis Radiology In Mumbai. Show doctors near me. Results offering Prime benefits Learn more. Dr. Preyas Vaidya. MBBS, Diploma in Tuberculosis and Chest Diseases (DTCD), FCCP - Pulmonary Medicine. 11 years experience. Pulmonologist. Fortis Hospital and 2 more clinics. Bronchial Asthma Treatment silicosis is the radiological finding of diffuse lung opacities, associated with the history of inhalation of silica dust or one of its several polymorphs. Occupational history forms a major. Silicosis Radiology In Chennai. Show doctors near me. Results offering Prime benefits Learn more. Dr. Vengada Krishnaraj. MBBS, Diploma in Tuberculosis and Chest Diseases (DTCD), DNB - Pulmonary Medicine. 12 years experience. Pulmonologist. Dr. Kamakshi Memorial Hospital and 2 more clinics

Asbestos Disease

The latency period (the time between initial exposure and radiological imaging) and duration of silica exposure was longer in patients diagnosed with silicosis than in those without silicosis (p. The diagnosis of silicosis in workers with a history of silica dust exposure was established by the presence of a chest radiograph classified as category ≥1/0 according to the International Labour Organization. 23 The exclusion criteria were as follows: history of smoking, radiological findings suggestive of pulmonary tuberculosis, and heart. Silicosis is a common occupational lung disease that is caused by the inhalation of crystalline silica dust. Silica is the most abundant mineral on earth. Workers that are involved for example in constructions, mining, or glass production are among the individuals with the highest risk of developing the condition

Silicosis is the most common occupational lung disease worldwide. It leads to respiratory impairment and may have associated infections that decrease pulmonary function. We describe the case of a 55-year-old man with chronic silicosis who presented with hemoptysis and a cavitated conglomerate mass. The final diagnosis was silicotuberculosis the radiological progression of silicosis among patients with silicosis who were previously exposed to silica from granite quarries and the risk factors that were associated with such pro gression. Material and methods Silicosis is a legally notifiable occupational dis ease since 1970 in Singapore, and annual ches

State of the Art: Imaging of Occupational Lung Disease

  1. e with which I am acquainted no silicosis is evident in any of the workmen. This is due to three things: (1) water seeps through the walls of the.
  2. Home chest radiology CXR video Silicosis : CXR Findings DAMS Unplugged. Silicosis : CXR Findings DAMS Unplugged Thursday, April 19, 2018 chest radiology, CXR, video. Here is a short DAMS Unplugged video discussing the CXR findings in silicosis
  3. ing
  4. Silicosis, asbestosis, and coal-workers' pneumoconiosis (CWP) all belong to a group called pneumoconioses. The exact translation of this word is lung dust. These pulmonary diseases are characterized by nonneoplastic granulomatous and fibrotic changes in the lungs after the inhalation of inorganic substances, such as coal dust, asbestos, or crystalline silica. [
  5. Silicosis grade was associated with D l CO (p < 0.05) independent of its association with either cigarette smoking or percent emphysema, but was not associated with level of FEV 1 or FVC. In the group without PMF (silicosis Grade 0, 1, or 2), smokers had worse emphysema than nonsmokers (p < 0.01); there was no such difference among the patients.
  6. ated collagen fibers (blue, in Simionescu trichromic staining) and tend to become confluent, compressing adjacent alveoli.Silica crystals appear as empty cleft-like spaces (Figure 2). With progression, perivascular and peribronchiolar collagen deposits will produce pulmonary hypertension
  7. Denim sandblasting is as a novel cause of silicosis in Turkey, with reports of a recent increase in cases and fatal outcomes. We aimed to describe the radiological features of patients exposed to silica during denim sandblasting and define factors related to the development of silicosis. Sixty consecutive men with a history of exposure to silica during denim sandblasting were recruited

The radiology findings did not allow a diagnostic distinction to be made between silicosis and sarcoidosis. Hence, an open lung biopsy was performed, which showed inflammatory infiltration in the pleura, non-necrotizing granuloma including multinucleated giant cells with hyalinization, and birefringent material in the lung parenchyma ().Since yeast, mycobacterial and fungus cultures were. Extent of silicosis as assessed by CT was compared with extent estimated from the chest radiographs using the ILO 1980 classification and pulmonary function tests. Significant correlation was found between both the mean attenuation values (r greater than 0.62, p less than 0.001) and the visual CT scores (r greater than 0.84, p less than 0.001. The International Labour Organization (ILO) [] currently classifies silicosis as simple or complicated based on the size of the pulmonary parenchyma opacities on chest radiographs.Complicated silicosis, which also is known as progressive massive fibrosis (PMF), is characterized by the conglomeration of nodules into large, homogeneous opacities that have a nonsegmental distribution []

Simple chronic silicosis, the most common type that we see today, results from exposure to low amounts of silica between 2 and 10 years. Chronic silicosis complicated, with silicotic conglomerates. In many cases the diagnosis of silicosis is made according to epidemiological and radiological data, without a histological confirmation The RACGP's new gplearning activity, 'Australia's emerging occupational health epidemic - Silicosis', was launched on 31 August by Dr Kerry Hancock, Chair of the RACGP Specific Interests Respiratory Medicine network, at a WorkSafe Victoria summit in Melbourne. The summit, 'Silicosis: A medical approach', was attended by medical. Diagnosis of silicosis generally relies on 3 key elements: a history of substantial exposure to silica dusts with appropriate latency from the time of first exposure, compatible radiological features, and exclusion of other competing diagnoses, such as miliary tuberculosis, fungal infections, sarcoidosis, idiopathic pulmonary fibrosis, other. Radiology Assistant. Information; Apps. Radiology Assistant 2.0 app; Android app; StartRadiology; How to make videos and illustrations. How to make illustrations in Keynote; How to make videos in Quicktime Player; CT Protocols. CT contrast injection and protocols; RECIST 1.1. RECIST 1.1 - examples; RECIST 1.1 - and more; RECIST 1.1 - the basic

16 Silicosis ideas radiology, radiology imaging, radiograph

The Radiology Assistant : Common disease

Jul 29, 2014 - Lung silicosis with progressive massive pulmonary fibrosi To address that issue, Liu et al evaluated the frequency with which lung cancer developed in subjects with and without radiological evidence of silicosis. 84 Subjects with the highest cumulative exposure to silica (N=3,907; 6.22 mg/m 3 years or more) showed an HR of 1.7 (95% CI 1.23-2.34) for lung cancer death vs the reference group without. Chronic exposure to silica is a recognized health hazard. Manifestations of pulmonary and extrapulmonary silicosis are well described. Secondary pulmonary arterial hypertension and pericardial involvement are described, but myocardial involvement has not been reported. In this case of newly diagnose

Pneumoconiosis (silicosis)

Silicosis is an aggressive and incurable lung disease which results from breathing in this crystalline dust. IQ Radiology Occupational Imaging Services: At IQ Radiology we provide high quality imaging services for occupational workers. Our highly specialised and fully accredited Radiologists provide diagnostic reporting for the detection of. Silicosis and stone masonry Manufactured stone contains up to 95% crystalline silica while natural stone such as marble or granite contains between 5 to 50% crystalline (WorkCover Queensland, 2018). Silicosis is an aggressive and incurable lung disease which results from breathing in this crystalline dust. Sunshine Coast Radiology Occupationa radiological silicosis, person-years of observa-tion were assigned to the non-silicosis category until the dates of onset of silicosis to maintain the appropriate time dependency in the analy-sis. There were 70 cases of silicosis in whom onset of the disease occurred after the start of follow up (1942), who thus contribute ed to artificial stone dust and who had a diagnosis of silicosis, of whom 13 patients underwent LTX. Silicosis-associated findings were graded and correlated to concomitant PFT. Results A statistically significant inverse relationship was found between chest CT scores and PFT including forced expired volume in the first second (r = −0.54, P < 0.0001), total lung capacity (r = −0.4, P < 0.

Silicosis Radiology - silicosi

Radiology Masterclass. Radiology Masterclass provides online medical imaging educational resources for medical students, junior doctors and allied health care professionals. Build your skills in medical imaging by using our free to access material, and then sign up to a course completion assessment to prove your knowledge The list intends to cover all occupational dust lung diseases that require reporting in line with ILO Classification such as coal workers pneumoconiosis, silicosis and asbestos-related lung disease. It is not intended to change normal clinical practice, for example referrals for chest radiology under Medicare BACKGROUND The role of silicosis as either a necessary or incidental condition in silica associated lung cancer remains unresolved. To address this issue a cohort analysis of dose-response relations for crystalline silica and lung cancer mortality was conducted among diatomaceous earth workers classified according to the presence or absence of radiological silicosis

In addition, the diagnosis of silicosis was made at autopsy, rather than radiologically, by experienced pathologists, using standardized methods. Autopsies are useful for diagnosing diseases such as silicosis that may be undetected on X rays. Corbett et al. (1999) found radiology to be insensitive for detecting early silicosis, using miniature. Silicosis, which acquired great significance during the period of increase in mining and construction, continues to be a pathology with a high morbidity and mortality within pneumoconiosis. Exposure to silica produces pathological, clinical and radiological alterations that together with compatible persona Radiological progression and lung function in silicosis: a ten year follow up study TZE-PINNG, SHIU-LUN CHAN, KA-PING LAM Abstract Chest radiographs and spirometric tests were performed on 81 patients who had silicosis from two granite quarries in 1975,73 of whom were followed up for two to 10 (mean 7*2) years. Eac

Silicosis is a lung disease.It usually happens in jobs where you breathe in dust that contains silica. That's a tiny crystal found in sand, rock, or mineral ores like quartz Introduccion. Durante los últimos años se ha producido un aumento en la aparición de nuevos casos de silicosis. En nuestra opinión, son varios los factores que han contribuido a ello, siendo fundamentales el deficiente control y conocimiento de las propiedades de nuevos materiales de trabajo, con la consiguiente permisividad en el uso tanto en tareas nuevas como en su paso desde otras. Breast All patients with suspected breast lumps, whether male or female, should be referred to the Breast Unit for assessment/ultrasound.. For Paediatric Imaging advice please click on the link to Paediatric Radiology How to refer. Referrals for all X-rays should be made via SCI Gateway using the Radiology Referral. If this is not possible please use the appropriate X-Ray department form Normal chest X-ray. This is a normal chest X-ray of an adult woman - note the following features. Central trachea. No ROTATION - spinous processes ( orange) half way between medial ends of clavicles ( asterisks) Adequate INSPIRATION - the mid-clavicular line ( red line) intersects the diaphragm between the 5th and 6th ribs anteriorly

Radiological Features of Silicosis SpringerLin

Silicosis Radiology Assistant — silicosis and coal worker

IPF is the most widely studied and most common ILD. It is characterised by progressive fibrosis, lung scarring and a radiological pattern known as usual interstitial pneumonia (UIP) [4-6].There are a number of clinical and mechanistic parallels between IPF and other fibrosing ILDs that may present a progressive phenotype [7-9].Given their overlapping clinical, radiological and pathological. We have identified the presence of both fibrotic/nodular silicosis and conspicuous alveolar proteinosis within the same lung parenchyma of both patients. We then demonstrate the radiological and histopathological correlates of disease; the first time this has been shown clearly in the literature Radiological and pathological features of both chronic and acute silicosis may be present. Likely to be associated with a greater rate of disease progression than chronic silicosis. Chronic silicosis. over 10 years. Can exist as: Simple silicosis: often asymptomatic with small, predominately upper lobe nodules less than 1cm in size

Silicosis Radiology — on a chest radiograph, complicated

These projects include investigating the efficacy and sensitivity of high-resolution CT scans compared with plain chest x-rays to screen workers for early silicosis, the efficacy of ultralow dose CT scans to detect silicosis and assessing how artificial intelligence can be used to enhance radiological evaluation The authors define subradiological silicosis as silicosis detectable on pathological examination of lung tissue but not visible radiologically. For extent of the phenomenon, the authors refer to a study using a large South African autopsy database of deceased miners and chest radiographs taken in life. At an International Labour Organisation. We considered four possible explanations for a possible recent decline in silicosis prevalence in this one shaft, and flat trend overall compared to the 1984 study: radiological misclassification of silicosis, bias from selection into the study, declining silicosis risk due to falling exposure to respirable crystalline silica and an increasing. Silicosis is a major health issue among workers exposed to crystalline silica. Bandyopadhyay et al. 14 stated that diagnostic challenges arise as silicosis shows resemblance in radiological. All combined, worth more than €3,000, but now available for a flat rate of only € 320 (excl. country-specific VAT) per year! Our Premium Education Package can be purchased as a standalone product or in combination with an ECR 2021 ticket. The Premium Education Package grants access from January 1 - December 31, 2021

Lung silicosis with progressive massive pulmonary fibrosis

Diagnosis of artificial stone silicosis relies on a thorough history of exposure to silica dust and compatible radiological features, together with exclusion of other causes. 18 Occupational history A careful and complete occupational history is arguably the most important factor in making a diagnosis Radiological evidence of silicosis (ILO score 1/0 or higher) was present in 77 (53%) out of 145 subjects with interpretable chest radiographs. These subjects had lower forced expiratory volume in one second and forced vital capacity. The risk of silicosis correlated with seniority. CHORUS is a hypertext medical reference. More than 1100 documents describe diseases, anatomy, and radiologic findings Radiological Imaging. Chest X-rays are no longer required as they are not sensitive enough to detect silicosis nor associated early changes. A low dose CT high resolution chest scan (LDCT) with a dose limit of 1 mSv or less, provides an image quality sufficient to detect silicosis and early changes. No contrast should be used

Radiological outcomes of whole lung lavage for artificial

8. Interstitial pulmonary diseases. Pulmonary fibrosis. Silicosis. Emphysema. 9. Diagnostic imaging of cardiac diseases. Methods, indications. Cardiomyopathies. Diseases of the pericardium. 10. Imaging of ischemic heart diseases and cardiac valve diseases. 11. Diseases of the aorta. Imaging methods, the role of CT and MRI. 12. Imaging in acute. Managing Silicosis. To keep the disease from getting worse, all silicosis patients need to eliminate any more exposure to silica. Other lung irritants, such as indoor and outdoor air pollution, allergens and smoke, should also be avoided Clinical Aspects of Silicosis Clinical Aspects of Silicosis Lanza, A. J. 1938-03-01 00:00:00 Clinical Aspects of Silicosis A. J. Lanza , M.D. New York City Excerpt IN presenting for discussion the clinical aspects of silicosis, it should be remembered that it is essentially a chronic, progressive disease

Accelerated silicosis is an emerging occupational disease risk caused by exposure to significant concentrations of respirable crystalline silica from high resolution CT scan silicosis protocol (private radiology provider) and autoimmune screen bloods/urine (local community lab) The role of silicosis as either a necessary or incidental condition in silica associated lung cancer remains unresolved. To address this issue a cohort analysis of dose-response relations for crystalline silica and lung cancer mortality was conducted among diatomaceous earth workers classified according to the presence or absence of radiological silicosis It consists in the association between silicosis and RA [2]. The radiological features consist in multiple well-defined round opacities, measured between 0.5 and 5 cm in diameter, distributed throughout both lung fields but predominantly at the periphery [8]. The association between long exposure to silica, pneumoconiosis and RA is proved [9] Silicosis. The diagnosis of silicosis is made based on a history of exposure to silica accompanied by a clinical and radiological profile consistent with the disease. In most cases, routine chest X-ray is sufficient for this purpose In this study a cohort of 2,260 South African gold miners who started mining in 1940 was followed for silicosis onset using radiological data up to 1989 and autopsy data up to 2003. The objective was to relate the age of onset of radiological silicosis to exposure pattern, and to compare radiological and autopsy findings. A first epidemiological reading of the annual chest radiographs (ILO Classi

LearningRadiology - Sarcoid, sarcoidosisX RAY EGG SHELL CALCIFICTIONOccupational lung diseases radiology