Lung tumor
Carcinoid and related tumors

Topic Completed: 1 September 2012

Revised: 31 January 2019, last major update September 2012

Copyright: (c) 2003-2016,, Inc.

PubMed Search: tumorlet lung

Deepali Jain, M.D.
Page views in 2018: 3,578
Page views in 2019 to date: 2,888
Cite this page: Jain D. Tumorlet. website. Accessed October 14th, 2019.
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
Positive stains
  • Same as carcinoid
Electron microscopy description
  • Same as carcinoid
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