A Rare Case of Adult Male Solid-Pseudopapillary Tumor

Kazuteru Watanabe, Toru Kubota, Kaori Kubota, Michio Ueda, Yasuhiko Miura¹⁾, Itaru Endo, Shinji Togo, Hiroshi Shimada and Takeshi Sasaki²⁾

Department of Gastroenterological Surgery, Yokohama City University Graduate School of Medicine
Department of Surgery, Yokohama Ekisaikai Hospital¹⁾
Department of Pathology, Yokohama City University Medical Center²⁾

A 41-year-old man with epigastralgia found by CT to have a pancreatic cystic mass was diagnosed by CT and MRCP as having a solid pseudo-papillary tumor (SPT) and underwent distal pancreatectomy. The resected specimen showed a 47×30×43 mm solid, cystic mass with calcification in the dense capsule. Solid parts were formed by bleeding and necrotic tissues. Histological examination showed a diffuse sheetlike arrangement of tumor cells having nuclear atypia. Pseudo-papillary clusters and lymphatic invasions had occured in the tumor. These findings suggest aggressive malignant potential. SPTs are reported to be rare and with low malignant potential, and occur mainly in young women. They can, however, occur in men and in all age groups. Complete resection is associated with long-term survival and close follow-up is advisable, particularly when histological examination suggests an aggressive tumor.

Key words
solid pseudo-papillary tumor, pancreatic tumor, solid cystic tumor

Reprint requests
Kazuteru Watanabe Department of Gastroenterological Surgery, Yokohama City University Graduate School of Medicine
3-9 Fukuura, Kanazawa-ku, Yokohama, 236-0004 JAPAN

Accepted
October 19, 2005

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