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Updated: May 10, 2026
Teratoma Generation in the Testis Capsule
Published on: November 7, 2011
Liposarcoma Arising From Mature Teratoma Following Testicular Tumor Surgery: A Case Report
Mai Yamazaki1, Kousuke Kitamura1, Kanako Ogura2
1Department of Urology Juntendo University Nerima Hospital Tokyo Japan.
Introduction:
Testicular germ cell tumors (GCTs) are rare cancers. Mature teratomas may rarely undergo somatic malignant transformation (SMT) and may exhibit histological features resembling those of sarcomas.
Case:
A 22-year-old male presented to our hospital with a complaint of a left scrotal mass. Under a diagnosis of metastatic mixed germ cell tumor, high inguinal orchiectomy was performed, followed by chemotherapy, retroperitoneal lymph node dissection, and metastasectomy. A liver specimen showed residual mature teratoma. Three years later, a left renal mass was found, and resection was performed. Histopathological examination confirmed it to be liposarcoma derived from mature teratoma.
