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The Korean Journal of Pathology 1990;24(3): 299-303.
Neuroendocrine Carcinoma of the Gallbladder Arising as Double Tumor.
Dae Hyun Baek, Seong Ki Min, Jin Man Kim, Kwang Sun Suh, Dae Young Kang
Department of Pathology, College of Medicine Chungnam National University, Taejeon, Korea.
ABSTRACT
Pleomorphic (undifferentated) carcinoma is a rare histologic type of carcinomas of the gallbladder and an atypical carcinoid is thought to be an intermediated type between carcinoid tumor and small cell carcinoma. Dense core "neurosecretory" granules can be found in the above mentioned tumors. We experienced a case of a double tumor of the gallbladder in a 51-year old male patient. Grossly, a large solid mass, about 5.0 cm in diameter, was found in the fundic portion and the neck portion also had a small 1.5 cm-sized polypoid mass. Microscopically, these lesions had features of pleomorphic carcinoma and atypical carcinoid, respectively. Immunohistochemically, they manifested reactivity for neuron specific enolase. Ultrastructural study revealed neurosecretory granules in the cytoplasms of tumor cells of the fundic and neck masses. Although light microscopic features of these tumor masses are quite different, we consider that these tumors represent a spectrum of neuroendocrine differentiation.
Key Words: Neuroendocrine carcinoma; Gallbladder