A mucinous cystic neoplasm of the pancreas containing an undifferentiated carcinoma component and harboring the NRAS driver mutation

A woman in her 20s visited our hospital with a chief complaint of abdominal distension and back pain. She was diagnosed with a cystic tumor (diameter 16 cm) in the tail of the pancreas and underwent a combined distal pancreatectomy, splenectomy, and left adrenalectomy. Histopathologically, the tumor...

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