Regional lymph node involvement and outcomes in appendiceal neuroendocrine tumors

A SEER database analysis

Amir Mehrvarz Sarshekeh, Shailesh Advani, Daniel M. Halperin, Claudius Conrad, Chan Shen, James C. Yao, Arvind Dasari

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Background: Appendiceal neuroendocrine neoplasms are most often diagnosed incidentally during appendectomy. The need for subsequent right hemicolectomy (RHC) is determined based on the risk of regional lymph node (LN) involvement. Tumor size has historically been used as an indicator of this risk, but controversy remains regarding its cut off. Furthermore, the impact of RHC on survival is unclear. Methods: We used the SEER database to identify patients diagnosed with appendiceal neuroendocrine tumors. Results: Of 1731 patients, 38.0% had well-differentiated neuroendocrine tumors (WDNETs), 60.8% had mixed histology tumors (MHTs), and 1.2% had poorly differentiated neuroendocrine carcinomas (PDNECs). In patients with WDNETs and MHTs who had adequate lymphadenectomy, higher rates of LN involvement were noted for tumors size 11-20 mm than ≤10 mm (56.8% vs. 11.6%, p < 0.001; 32.9% vs. 10.4%, p=0.004, respectively). The type of surgery did not affect OS in cases with MHTs with LN involvement (HR 1.00; 95% CI, 0.53-1.89; p =0.99). Patients with regionally advanced WDNET showed excellent survival and only 3 patients (out of 118) died from cancer within 10 years. Conclusions: 10 mm appears to be a more appropriate cutoff than 20 mm for predicting LN metastasis in appendiceal NETs. Cases with WDNETs and nodal involvement demonstrate overall excellent prognosis irrespective of type of surgery (i.e. RHC may not improve outcome). In MHTs with LN metastases, survival is markedly worse in spite of RHC. The role of adjuvant therapy should be evaluated in this subset.

Original languageEnglish (US)
Pages (from-to)99541-99551
Number of pages11
JournalOncotarget
Volume8
Issue number59
DOIs
StatePublished - Jan 1 2017

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Neuroendocrine Tumors
Lymph Nodes
Databases
Histology
Neoplasms
Survival
Appendiceal Neoplasms
Neoplasm Metastasis
Neuroendocrine Carcinoma
Appendectomy
Lymph Node Excision

All Science Journal Classification (ASJC) codes

  • Oncology

Cite this

Sarshekeh, A. M., Advani, S., Halperin, D. M., Conrad, C., Shen, C., Yao, J. C., & Dasari, A. (2017). Regional lymph node involvement and outcomes in appendiceal neuroendocrine tumors: A SEER database analysis. Oncotarget, 8(59), 99541-99551. https://doi.org/10.18632/oncotarget.20362
Sarshekeh, Amir Mehrvarz ; Advani, Shailesh ; Halperin, Daniel M. ; Conrad, Claudius ; Shen, Chan ; Yao, James C. ; Dasari, Arvind. / Regional lymph node involvement and outcomes in appendiceal neuroendocrine tumors : A SEER database analysis. In: Oncotarget. 2017 ; Vol. 8, No. 59. pp. 99541-99551.
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Sarshekeh, AM, Advani, S, Halperin, DM, Conrad, C, Shen, C, Yao, JC & Dasari, A 2017, 'Regional lymph node involvement and outcomes in appendiceal neuroendocrine tumors: A SEER database analysis', Oncotarget, vol. 8, no. 59, pp. 99541-99551. https://doi.org/10.18632/oncotarget.20362

Regional lymph node involvement and outcomes in appendiceal neuroendocrine tumors : A SEER database analysis. / Sarshekeh, Amir Mehrvarz; Advani, Shailesh; Halperin, Daniel M.; Conrad, Claudius; Shen, Chan; Yao, James C.; Dasari, Arvind.

In: Oncotarget, Vol. 8, No. 59, 01.01.2017, p. 99541-99551.

Research output: Contribution to journalArticle

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T1 - Regional lymph node involvement and outcomes in appendiceal neuroendocrine tumors

T2 - A SEER database analysis

AU - Sarshekeh, Amir Mehrvarz

AU - Advani, Shailesh

AU - Halperin, Daniel M.

AU - Conrad, Claudius

AU - Shen, Chan

AU - Yao, James C.

AU - Dasari, Arvind

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Y1 - 2017/1/1

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