Sarcoidosis is a chronic multi-system disease of unknown origin involving the eyes, skin, lungs, heart, bones and nerves. Skin lesions are relatively common, and are classified as either specific or non-specific (I). Specific lesions are those that show the typical sarcoid granulomas, including lupus pernio, infiltrated plaques, macuiopapuiar eruptions, subcutaneous nodules and infiltration of old scars (I). The most typical non-specific skin lesion is erythema nodosum. The patient described here had skin lesions that first suggested a diagnosis of erythema induratum of Bazin, but we ultimately diagnosed sarcoidosis based on other findings, including uveitis, bilateral hilar lymphadenopathy, an increased level of serum angiotensin-converting enzymes (ACE) and a negative response to purified protein derivative of tuberculin (PPD). the deep dermis and the subcutaneous tissue (Fig. 2a). Caseation necrosis and Langerhans' giant cells were partially seen among the epithelioid granulomas (Fig. 2b). Several small vessels in the deep dermis were involved, with granuloma and disruption of elastic fibre (Fig. 2c). Acid-fast bacilli were not found in the paraffin section ofthe specimen stained by Ziehl-Neelsen melhod and by PCR. Skin test with PPD showed no erythema at 48 h. Cultures of sputum and broncho-alveolar lavage (BAL) fluid were negative for acid-fast bacilli and common bacteria. The ratio of helper to suppressor T cells in BALfluid was 5,8. The lung biopsy specimen obtained by the transbronchial method demonstrated epithclioid granulomas without caseation necrosis. Mediastinal adenopathy was found to be present on computed tomography ofthe chest. Sarcoidosis was finally diagnosed 8 weeks after the initial presentation. At that time, a daily dosage of prednisolone (30 mg) was prescribed for the uveitis. with a gradual reduction to 10 mg directed by the patient's ophthalmologist. After 6 months of treatment with prednisolone, the erythematous induration with ulcers had healed, leaving scars.
CASE REPORTA 59-year-old man presented with a 6-week history of a progressive, erythematous induration on the legs and arms. He had a medical history of uveitis, but not of tuberculosis. When first seen, he had multiple erythematous induration with tendemess on the arms and legs, linear ulcers and reticulated reddish-biue discoloration mostly on the edge ofthe erythema on the left leg (Fig. 1 ). A chest X-ray revealed diffuse changes suggestive of chronic bronchitis. Results from laboratory test, including a full blood count, urinalysis and liver function test, were normal except for elevated ACE (79.8 U/I, normal range: 7-25 U/1), elevated lysozymes (90 |Jg/ml, normal: 5-10 |ig/ml). and slightly elevated CRP ( 1.36 mg/dl. normal: