title: Adenocarcinoma arising from sacrococcygeal mature teratoma in an adult female: report of a case.
abstract: We report a case of adenocarcinoma arising from a sacrococcygeal mature teratoma in an adult female. A 62-year-old female was diagnosed with a presacral tumor 10 years ago. Pelvic computed tomography (CT) demonstrated a presacral heterogeneous tumor, containing multiloculated cystic area and enhanced solid component with calcification. Percutaneous needle biopsy for the solid component of the tumor identified an adenocarcinoma and the patient was diagnosed as having a sacrococcygeal teratoma with malignant transformation. Abdomino-sacral rectal resection with sacral amputation at the upper edge of the S5 was performed. The pathological diagnosis was adenocarcinoma derived from a mature teratoma. The tumor cells had infiltrated the rectal wall. After 7 months, a follow-up CT demonstrated swelling of the right inguinal lymph nodes and a right inguinal lymphadenectomy was performed. Pathological examination showed metastatic lymph nodes. The patient is doing well 21 months after the second surgery, with no signs of recurrence.
authors.affiliation: Division of Surgical Oncology, Department of Surgery, Nagoya University Graduate School of Medicine , Nagoya , Japan.
authors.forename: Naoki
authors.initials: N
authors.lastname: Matsumoto
authors.affiliation: Division of Surgical Oncology, Department of Surgery, Nagoya University Graduate School of Medicine , Nagoya , Japan.
authors.forename: Keisuke
authors.initials: K
authors.lastname: Uehara
authors.affiliation: Division of Surgical Oncology, Department of Surgery, Nagoya University Graduate School of Medicine , Nagoya , Japan.
authors.forename: Masataka
authors.initials: M
authors.lastname: Ando
authors.affiliation: Division of Surgical Oncology, Department of Surgery, Nagoya University Graduate School of Medicine , Nagoya , Japan.
authors.forename: Junki
authors.initials: J
authors.lastname: Arimoto
authors.affiliation: Division of Surgical Oncology, Department of Surgery, Nagoya University Graduate School of Medicine , Nagoya , Japan.
authors.forename: Takehiro
authors.initials: T
authors.lastname: Kato
authors.affiliation: Division of Surgical Oncology, Department of Surgery, Nagoya University Graduate School of Medicine , Nagoya , Japan.
authors.forename: Hayato
authors.initials: H
authors.lastname: Nakamura
authors.affiliation: Division of Surgical Oncology, Department of Surgery, Nagoya University Graduate School of Medicine , Nagoya , Japan.
authors.forename: Tomoki
authors.initials: T
authors.lastname: Ebata
authors.affiliation: Division of Surgical Oncology, Department of Surgery, Nagoya University Graduate School of Medicine , Nagoya , Japan.
authors.forename: Yukihiro
authors.initials: Y
authors.lastname: Yokoyama
authors.affiliation: Division of Surgical Oncology, Department of Surgery, Nagoya University Graduate School of Medicine , Nagoya , Japan.
authors.forename: Masato
authors.initials: M
authors.lastname: Nagino
keywords: adenocarcinoma; malignant transformation; sacrococcygeal; teratoma