Delayed pancreatic metastasis from forearm mesenchymal chondrosarcoma: a diagnostic challenge.

Mesenchymal chondrosarcoma is a rare, high-grade malignant tumour comprising 2-4% of all chondrosarcomas, with pancreatic metastasis being exceptionally uncommon. A woman in her late 20s, with a history of forearm mesenchymal chondrosarcoma treated 5 years ago presented with jaundice, weight loss and generalised pruritus. Ultrasound followed by CT revealed a calcified pancreatic mass with surrounding vascular encasement, initially raising the possibility of pancreatic adenocarcinoma. A biopsy revealed the lesion to be a metastatic mesenchymal chondrosarcoma based on histomorphology and immunophenotyping. Being a locally advanced tumour, resection was deemed impossible, and the patient was referred for chemotherapy with regimens modelled on Ewing's sarcoma treatment protocols. This case underscores the rarity of delayed pancreatic metastasis in mesenchymal chondrosarcoma, the importance of careful histological examination, and the absence of established therapeutic guidelines.