A Case of Gastric Leiomyoblastoma and Usefulness of Endoscopic Ultrasonography

Teruo Kiyama, Masahiko Onda, Akira Tokunaga, Takeshi Okuda, Takashi Mizutani, Keigo Nishi, Masahito Toba, Shoji Kyono, Norio Matsukura, Kiyohiko Yamashita, Takeo Nomura*, Goro Asano**

First Department of Surgery, *Third Department of Internal Medicine and **Second Department of Pathology, Nippon Medical School

A 47-year-old woman was admitted to our hospital because of abnormal findings in a gastrointestinal series, without any symptoms. An elevated lesion, Yamada type II, was found in the gastric body upon examination by a gastrointestinal series and gastroendoscopy. Endoscopic ultrasonography revealed an abnormal heteroechoic mass with almost clear margins in the fourth layer of the stomach, wall. The diagnosis was a submucosal tumor originating from smooth muscle tissue. Exploratory laparotomy revealed a thumb headsized mass without apparent metastasis or direct invasion into the surrounding organs, and local excision was performed. Histological examination of the specimen showed leiomyoblastoma, with oval-shaped cells each containing a clear space near the nucleus, and medullary growth. Thus, endoscopic ultrasonography was shown to be useful for imaging details of the tumor, suggesting the possibility of diagnosis before surgery.

Key words
submucosal tumor of the stomach, endoscopic ultrasonography, leiomyoblastoma

Reprint requests
Teruo Kiyama First Department of Surgery, Nippon Medical School
1-1-5 Sendagi, Bunkyo-ku, 113 JAPAN

Accepted
October 9, 1991

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