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A 24-ycar-old woman, G3-P2-0l, at 28 weeks' gestation

The clinical and radiographic features of several unusual tumors involving the biliary tract are reviewed. The differential diagnostic findings of granular cell myoblastoma, villous tumors, sarcoma botryoides, and carcinoid of the bile ducts on direct cholangiography are illustrated. Selected examples of secondary invasion of the biliary tract by hepatoma and metastatic lesions are also included.