Pathological analysis of collision (double primary) cancer in the upper digestive tract concomitant with gastric stromal tumor: a case report.


Carcinoma of the esophagus and cardiac cancer are common malignancies, while multiple primary cancers in the esophagus and cardia is rarely encountered and easily misdiagnosed. Multiple primary cancers mean the same organs (tissues) or different organs (tissues) have two or more than two primary malignant tumors at the same time or in sequence in the same… (More)


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