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Clinicopathological characteristics of rectal carcinoids

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International Journal of Colorectal Disease Aims and scope Submit manuscript

Abstract

Purposes

Carcinoids are heterogeneous neuroendocrine tumors with malignant potential. The rectum is the third most common location for gastrointestinal carcinoids. We assessed the clinicopathological characteristics of rectal carcinoids.

Methods

A retrospective study of 203 patients treated for rectal carcinoids at the Asan Medical Center, Seoul, Republic of Korea from 1991 to 2007.

Results

The patients were on average 51 (18–83) years old. The male-to-female ratio was 1.48:1. Over half (62.1%) of the patients were asymptomatic. The most frequent symptoms in the symptomatic patients were abdominal pain (11.1%) and hematochezia (10.7%). Local excision was applied to 92.1%, low anterior resection to 4.9%, and biopsy only to 3.0% of total patients. Initially, 4.4% presented with distant metastasis. Distant metastasis rates for tumors ≤1 cm, >1 to ≤2 cm, and >2 cm were 1.7% (3/177), 15.0% (3/20), and 50.0% (3/6), respectively. In the follow-up period, three patients showed recurrences. The size, lymphovascular invasion, perineural invasion, and T and N stages were associated with distant metastasis. The overall 5-year survival rate was 94.0%. The TNM stage and presence of lymphovascular invasion were associated with lower survival.

Conclusions

The chance that a rectal carcinoid will develop distant metastases increases as the tumor increases in size, lymphovascular invasion or perineural invasion is present, and T and N stages increase. The TNM stage and presence of lymphovascular invasion were associated with lower survival. Treatment plan should be chosen carefully considering above factors.

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Correspondence to Jin Cheon Kim.

Additional information

Sang Nam Yoon and Chang Sik Yu equally contributed to this work.

This study was supported by a grant of the Korea Health 21 R&D Project, Ministry for Health, Welfare and Family Affairs, Republic of Korea (A062254).

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Yoon, S.N., Yu, C.S., Shin, U.S. et al. Clinicopathological characteristics of rectal carcinoids. Int J Colorectal Dis 25, 1087–1092 (2010). https://doi.org/10.1007/s00384-010-0949-y

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