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  • Title: Foreign bodies in granulomatous cutaneous lesions of patients with systemic sarcoidosis.
    Author: Marcoval J, Mañá J, Moreno A, Gallego I, Fortuño Y, Peyrí J.
    Journal: Arch Dermatol; 2001 Apr; 137(4):427-30. PubMed ID: 11295921.
    Abstract:
    OBJECTIVE: To assess the presence of foreign material in the granulomatous cutaneous lesions of patients with systemic sarcoidosis. DESIGN AND SETTING: Observational study reevaluating histological specimens at a university referral hospital. PATIENTS: Sixty-five patients diagnosed as having sarcoidosis who developed granulomatous cutaneous involvement. MAIN OUTCOME MEASURES: To detect the presence of polarizable foreign particles in cutaneous biopsy specimens and to evaluate the association with clinical features of the patients. RESULTS: Granulomatous cutaneous involvement was demonstrated in 65 (15.3%) of 425 patients with systemic sarcoidosis. In 14 (22%) of the 65 patients, the cutaneous biopsy specimen showed foreign particles in polarized light. The skin lesions corresponded to 3 different clinical patterns: an admixture of papules and infiltration of previously undetected minute scars (n = 6); scar sarcoidosis (n = 4); and subcutaneous nodules (n = 4). The lesions were located most frequently in the extremities, involving the knees in 10 patients. CONCLUSIONS: The presence of polarizable foreign body material in granulomatous cutaneous lesions is not infrequent in patients with systemic sarcoidosis. Inoculation of foreign matter from a previous inapparent minor trauma may induce granuloma formation in individuals with sarcoidosis.
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