Abstract
An autopsy case of retroperitoneal leiomyosarcoma of a centenarial male is described. He complained of abdominal pain in his left side 1 month before his death. Ultrasonography and computed tomography revealed a large mass in the left abdominal cavity. At autopsy, a circumscribed mass, 15 cm in diameter, was found in the left-upper abdominal cavity, and seemed to be derived from the retroperitoneum in an exophytic manner. Histologically, spindle cells with slight eosinophilic cytoplasm and blunt-ended nuclei showed interwoven fascicular growth, and mitotic figures were easily encountered. Immunohistochemically, the tumor cells were labeled by alpha-smooth muscle actin and vimentin. To our knowledge, this case of leiomyosarcoma has presented in the oldest patient ever reported. The rarity of soft tissue sarcomas in the extremely elderly is also discussed.
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