Primary Neuroendocrine Neoplasm of the Anterior Sacral Region Treated by Laparoscopic Resection

Abstract

Neuroendocrine neoplasm (NEN) located in the pelvis is very rare. In this study, we report a case of NEN in the anterior sacral region that was treated by surgical resection. The patient was a 69-year-old woman who had been diagnosed with a pelvic tumor in the anterior sacral region with a cystic component 7 years ago. Laparoscopic resection of the pelvic tumor was performed as diagnostic treatment because CT and MRI suggested a primary neurogenic tumor and malignancy could not be ruled out due to the slow growth trend. The histopathological diagnosis was NET G1 and the tumor was considered to be primary in the anterior sacral region. The patient is alive 1 year and 4 months after surgery without recurrence. NEN is known to be associated with lymph node metastasis and distant metastasis, and the recurrence rate after resection is relatively high. Therefore, NEN should be included in the differential diagnosis of tumors arising in the anterior sacral surface, and surgical resection should be considered.