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Sarcoidosis is a systemic granulomatous disease of unknown etiology that has a wide variety of clinical manifestation. Lung involvement may slowly undergo pulmonary fibrosis. Chronic sarcoid arthritis is a rare, usually non destructive arthropathy; may be a mono, oligo or polyarthritis. Knees, ankles, shoulders, wrists and small joint of the hands and feet may be involved. It can involve skin, eyes, exocrine glands such as salivary and lacrimal glands, and many other tissues. We describe the case of a 77 years old woman with a history of rhinopharyngitis with epistaxis and chronic laryngitis since youth; a dry mouth and throat, a erytematous, infiltrative skin lesion in the forehead and in the nape of the neck, a purple lesion of the left ear and nose, skin distrophy of the hands from 30 years before. She underwent an operation for a left femoral fracture with emotrasfusion 14 years ago. Then she developed a polyarthritis of the small joints of the hands (II, III and IV right DIP, I, III, e V left DIP; III and V bilateral PIP), knees, tarsi, toes and left elbow. An HCV chronic hepatitis was discovered 6 years before. She is affected by productive cough, dysphonia, dyspnea at rest, feveret, cephalea and asthenia for over 5 years. Laboratory examination revealed leukopenia, HCV hepatitis with anti HCV, HCV-RNA, transaminases elevated and cryoglobulinemia. HCV may be involved in the etiopathogenesis of rheumatic diseases, lung fibrosis and may moreover contribuite to the onset or progression of sarcoidosis; the possible pathogenesis is discussed.
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