Clear cell sarcoma of the nuchal region with metastasis in stomach

Clear cell sarcoma/malignant melanoma of soft parts is a rare malignant tumor that originates from the neural crest. It is most common in young men in the lower limbs, grows slowly in the form of deep localized nodes around the tendons, fascia, and aponeurosis. Prognosis is poor, local recurrences and metastases are common. We present a case of a 53-year-old patient who sought medical attention due to the presence of a tumefaction in the nuchal neck region, followed by pain, heightened sensitivity, and numbness in his right hand. After excision, histological examination, and application of immunohistochemical and histochemical methods, malignant melanoma of soft tissues was diagnosed. Fourteen months after the excision of the neck tumor, a metastatic stomach disease was diagnosed. Larger tumors with necrosis, expressed pleomorphisam, and increased mitotic activity give metastases before local recurrence. Diagnosis is set using immunohistochemical methods after surgical excision of the tumor and the prognosis of the disease depends on the size of tumor and complete surgical excision.