Lung - nontumor
Bacillary angiomatosis

Author: Elliot Weisenberg, M.D. (see Authors page)

Revised: 23 February 2017, last major update September 2011

Copyright: (c) 2003-2017,, Inc.

PubMed search: bacillary angiomatosis [title]

Cite this page: Bacillary angiomatosis. website. Accessed November 15th, 2018.
Clinical features
  • Mainly occurs in immunodeficient patients, especially in AIDS, but also with transplantation and chemotherapy
  • Caused by Bartonella henselae, B. quintana
  • Pseudoneoplastic vascular proliferation affecting skin, soft tissue, lungs, bronchi, and other sites; known as peliosis in the liver and spleen
  • See also Lymph nodes - not lymphoma chapter
Case reports
  • Erythromycin, other macrolides or doxycycline are very effective
Microscopic (histologic) description
  • Vascular proliferation with neutrophils and mononuclear cells with smudgy basophilic material representing bacteria
  • Prominent endothelial cells with nuclear atypia and mitotic figures
Positive stains