TY - JOUR
T1 - A Comparison between Appendiceal and Nonappendiceal Neuroendocrine Tumors in Children and Young Adults
T2 - A Single-institution Experience
AU - Boston, Catherine H.
AU - Phan, Alexandria
AU - Munsell, Mark F.
AU - Herzog, Cynthia E.
AU - Huh, Winston W.
N1 - Publisher Copyright:
© 2015 Wolters Kluwer Health, Inc. All rights reserved.
PY - 2015/8/6
Y1 - 2015/8/6
N2 - Background: Pediatric neuroendocrine tumors (NETs) are rare tumors. The purpose of this study is to report the clinical characteristics and outcomes of pediatric patients treated for NET at a single institution. Procedure: A retrospective record review. Results: There were 33 evaluable patients with median age of 17.9 years (range, 9.9 to 21.9 y) and predominantly females (58%). There were 17 patients with well-differentiated appendiceal NET, whereas 16 were nonappendiceal. Most common nonappendiceal sites were unknown primary (N=6) and pancreas (N=4). Majority of tumors were low grade (N=24, 73%) and small (T1, N=22, 67%). Nonappendiceal tumors were more likely to be larger or high-grade tumors (5/16, 31%), or with metastasis. All appendiceal NET patients underwent curative surgery. All patients who experienced treatment failure had nonappendiceal NET, despite prior chemotherapy in 8 of 9 patients. The 5-year overall survival rates for patients with appendiceal and nonappendiceal NET were 100% and 66% (95% CI, 45%-95%; P=0.006); and 5-year relapse-free survival rate for patients with appendiceal and nonappendiceal NET were 100% and 41% (95% CI, 22%-75%; P=0.002). Conclusions: Well-differentiated appendiceal tumors were the most common pediatric NET and have an excellent prognosis. Better therapies are needed for patients with nonappendiceal NET.
AB - Background: Pediatric neuroendocrine tumors (NETs) are rare tumors. The purpose of this study is to report the clinical characteristics and outcomes of pediatric patients treated for NET at a single institution. Procedure: A retrospective record review. Results: There were 33 evaluable patients with median age of 17.9 years (range, 9.9 to 21.9 y) and predominantly females (58%). There were 17 patients with well-differentiated appendiceal NET, whereas 16 were nonappendiceal. Most common nonappendiceal sites were unknown primary (N=6) and pancreas (N=4). Majority of tumors were low grade (N=24, 73%) and small (T1, N=22, 67%). Nonappendiceal tumors were more likely to be larger or high-grade tumors (5/16, 31%), or with metastasis. All appendiceal NET patients underwent curative surgery. All patients who experienced treatment failure had nonappendiceal NET, despite prior chemotherapy in 8 of 9 patients. The 5-year overall survival rates for patients with appendiceal and nonappendiceal NET were 100% and 66% (95% CI, 45%-95%; P=0.006); and 5-year relapse-free survival rate for patients with appendiceal and nonappendiceal NET were 100% and 41% (95% CI, 22%-75%; P=0.002). Conclusions: Well-differentiated appendiceal tumors were the most common pediatric NET and have an excellent prognosis. Better therapies are needed for patients with nonappendiceal NET.
KW - carcinoid
KW - childhood cancer
KW - neuroendocrine tumors
UR - http://www.scopus.com/inward/record.url?scp=84938600390&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84938600390&partnerID=8YFLogxK
U2 - 10.1097/MPH.0000000000000350
DO - 10.1097/MPH.0000000000000350
M3 - Article
C2 - 25985239
AN - SCOPUS:84938600390
SN - 1077-4114
VL - 37
SP - 438
EP - 442
JO - Journal of Pediatric Hematology/Oncology
JF - Journal of Pediatric Hematology/Oncology
IS - 6
ER -