Abstract
A 61-year-old male patient with malignant melanoma on his right heal had been aware of a black macule there for 40 years. Since 17 months after local excision of the primary lesion and radical dissection of the right femoral, inguinal and external iliac lymph nodes, many in-transit matastases (IM) have appeared on the right ventral and medial femoral region and the anterior region of the knee one after another. The histological findings of the primary lesion and IM revealed that dermal melanocytelike neoplastic cells were lined up along collagen bundles with configuration of a common blue nevus. The presence of obvious junctional activity of the tumor in the primary lesion denied the tumor origin from a long-standing blue nevus. The impaired lymphatic circulation following the lymph-node dissection may be one possible cause of the development of the IM in our case, but we rather think that the IM had already occurred before the dissection because of the evidence of tumor metastasis in 5/12 dissected lymph nodes.
Published Version
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