A Case of Giant Appendix Mucinous Carcinoma Invaded Into the Abdominal Wall and Right Gluteal Region

The patient was a 79-year-old woman with the chief complaint of a right gluteal mass. The cystic mass of the appendix had progressed to the right posterior abdominal wall and the subcutaneous tissue of the right gluteal region. The total size was 17 × 14 cm. In cooperation with orthopedic surgeons, we performed right hemi-colectomy with the abdominal wall, right iliac bone and right gluteus medius muscle resection, and finally we could resect the tumor en-bloc. After the resec-tion, a large abdominal wall defect remained, so we performed reconstruction of the abdominal wall in cooperation with plastic surgeons. Pathologically, we diagnosed the tumor as stage 2C mucinous adenocarcinoma of the appendix. We have followed up the patient without adjuvant chemotherapy. No recurrence has been observed for four years and three months, and the patient retains a high quality of life. Even if mucinous cancer of the appendix is far advanced, we can expect long-term survival with curative resection. It is also possible to obtain a good quality of life by abdominal wall reconstruction, so we should try aggressive surgical treatment in cooperation with surgical doctors of other departments.