The Clinicopathological Aspects of Primary Presacral Neuroendocrine Neoplasms: One Center Experience.

Presacral neuroendocrine neoplasms (NENs) are rare entities that are found at the presacral space. We report our experience in the diagnosis, management, and outcomes of primary presacral NENs.

This was an institutional review board-approved retrospective review of medical records and surgical pathology specimens of patients with a diagnosis of NENs at Cedars-Sinai Medical Center between January 2000 and April 2016.

Ten patients were identified. The median age at presentation was 38 years (range, 20-77 years), and 8 were women. One patient presented with carcinoid-like symptoms, 2 were diagnosed incidentally, and 7 presented with symptoms related to mass effect. The median size of the tumor was 7.0 cm (range, 3-12 cm). On pathologic review, 3 of 10 were low-grade and well-differentiated, 5 of 10 were intermediate-grade and well-differentiated, 2 of 10 were grade 3 and classified as high-grade and poorly differentiated neuroendocrine tumors. Seven cases were metastatic on presentation with lymph node, liver, lung, or skeletal metastasis. Seven of 8 cases were detectable using Octreoscan. Eight patients were treated with a somatostatin analog and 5 patients were treated surgically.

Presacral NENs are clinically similar to gastroenteropancreatic tumors. Octreoscan imaging and somatostatin analog therapies were frequently applied. Further biologic characterization of this rare subtype is needed.