Malignant melanoma: An important differential diagnosis for clear cell sarcoma of the gastrointestinal tract.

A case report by Liu describes the characteristics of metastatic clear cell sarcoma (CCS) of the pancreas and provides valuable therapeutic insights for this rare malignancy. This case is interesting because of its rarity, suggesting that the pancreas may be a potential target organ for CCS, either primary or metastatic. At the same time, the authors also emphasize the importance of regular postoperative follow-up for timely detection of recurrent lesions, as CCS is characterized by a high degree of malignancy and a high rate of recurrent metastases. Considering that CCS of the gastrointestinal tract is easily confused with malignant melanoma (MM) of the gastrointestinal tract, here we compare the clinical features, histopathological and immunohistochemical characteristics, diagnosis, treatment, and prognosis of CCS and MM of the gastrointestinal tract, hoping to provide a reference for clinical work.