A patient with a clear cell sarcoma of tendons and aponeuroses arising in the left sacral area is reported. The tumor grossly contained two black foci that had pigment with the staining characteristics of melanin on light microscopy. Electron microscopy of these areas showed the pigment to be within
Melanin was proved in the tumorous cells in a 62-year-old man who had a malignant tumor with the structure of clear cell sarcoma of tendons on the sole of the foot. Electronoptic examination confirmed the presence of numerous melanosomas and their complexes. Although the tumor may be regarded as a
Two cases of clear cell sarcoma, one with many melanin pigmented cells and the other scanty, are described. Both are associated with tendons of the lower extremities of young Chinese adults. Their clinical behaviour differed vastly; one patient was dead seven months after local excision and block
A case is described of a clear cell sarcoma with ultrastructural evidence of melanin production. The tumour appeared on the distal portion of the index finger of a thirteen-year-old girl and showed little change in size over seven years of observation by the patient. At age twenty she required
We report a 62-year-old male with a clear cell sarcoma of tendons and aponeuroses arising in the area of the M. flexor carpi ulnaris. Grossly, the tumor had a black appearance. Light microscopic inspection showed a large amount of melanin. Electron microscopically, the tumor pigment was located
Clear cell sarcoma (CCS), a rare malignant tumor with a predilection for young adults, is of poor prognosis. Recently however, boron neutron capture therapy (BNCT) with the use of p-borono-L-phenylalanine (BPA) for malignant melanoma has provided good results. CCS also produces melanin; therefore,
We present a case of alveolar soft part sarcoma of the vagina in an 18-year-old woman. The presenting symptoms were menometrorrhagia and a painless vaginal mass. The tumor was in the vaginal stroma with intact mucosa. Periodic acid-Schiff stain showed positive diastase-resistant crystals in some of
In a survey of 246 soft tissue sarcomas in the extremities and limb girdles reported to the Finnish Cancer Registry in 1960-1969, two clear cell sarcomas of tendons and aponeurones were diagnosed. We subsequently diagnosed two more examples. Three tumors were located in the foot and one in the
Malignant melanoma (MM) of soft tissue, also called clear cell sarcoma (CCS) of tendons and aponeuroses, derives from the neural crest. CCS is similar morphologically to MM but has no precursor skin lesion, and instead, has a characteristic chromosomal translocation. Prognosis is related to the
Clear cell sarcoma, first described by Enzinger in 1965, is an uncommon malignant soft tissue neoplasm that displays melanocytic differentiation. It occurs predominantly in the soft tissue of the extremities in young adults or children. Primary clear cell sarcoma of the bone is extremely rare, only
We report a case of clear cell sarcoma (CCS) in the left buttock in which serum neuron-specific enolase (NSE) was useful as a biomarker of CCS progression. A 40-year-old man had a subcutaneous tumor, 1.7 cm in diameter, in the left buttock. Histopathology revealed that the tumor consisted of nests
A retrospective study of 141 cases of clear cell sarcoma of tendons and aponeuroses revealed that the tumor occurred predominantly in young patients between 15 and 35 years of age, was slightly more common in female than in male patients, and originated chiefly from tendons, aponeuroses, and fascial
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