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Arthaud, J. Bradley: Pigmented nodular synovitis: Report of 11 lesions in non-articular locations. Am. J. Clin. Pathol. 58: 511–517, 1972. Eleven cases of pigmented nodular synovitis occurring in non-articular sites proximal to the wrists and ankles were seen in consultation over a 10-yr. period. The lesions ranged from 1.5 to 14 cm. in greatest dimension, with various degrees of encapsulation. Histologically there was a striking similarity to the familiar pigmented villonodular tenosynovitis of the fingers. It is important to differentiate proximal pigmented nodular synovitis from sarcoma to avoid unnecessary surgery.
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J. Bradley Arthaud (1972) studied this question.
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