Neuroendocrine tumors

Topic Completed: 1 September 2012

Minor changes: 19 March 2021

Copyright: 2003-2021,, Inc.

PubMed Search: tumorlet lung

Deepali Jain, M.D.
Page views in 2020: 4,366
Page views in 2021 to date: 1,689
Cite this page: Jain D. Tumorlet. website. Accessed May 8th, 2021.
Definition / general
  • Nodular proliferation of small spindle cells near bronchioles
  • May be associated with bronchiectasis or other causes of scarring
  • Almost always benign
  • By definition, 5 mm or less
Microscopic (histologic) images

Contributed by Andréanne Gagné, M.D., M.Sc. and Philippe Joubert, M.D., Ph.D.
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Salt and pepper chromatin

Positive stains
  • Same as carcinoid
Electron microscopy description
  • Same as carcinoid
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