Lymph nodes & spleen, nonlymphoma

Lymph nodes-vascular lesions

Angiomyomatous hamartoma



Topic Completed: 1 January 2014

Minor changes: 29 September 2020

Copyright: 2003-2021, PathologyOutlines.com, Inc.

PubMed Search: Angiomyomatous hamartoma


Patricia Tsang, M.D., M.B.A.
Page views in 2020: 3,069
Page views in 2021 to date: 2,545
Cite this page: Tsang P. Angiomyomatous hamartoma. PathologyOutlines.com website. https://www.pathologyoutlines.com/topic/lymphnodesangiomyomatoushamartoma.html. Accessed October 15th, 2021.
Definition / general
  • First described by Chan et al. in 1992 (Am J Surg Pathol 1992;16:335)
  • Rare and benign vascular disorder due to proliferation of blood vessels and smooth muscle in lymph nodes, often of long duration
Sites
Pathophysiology
  • Unknown etiology; may represent reparative reaction to previous nodal inflammation
Clinical features
  • Usually males, all ages
  • Benign clinical course
  • Local excision is curative
  • No known recurrence or metastasis
Case reports
Gross description
  • Enlarged and matted lymph nodes replaced by firm, white tissue
Gross images

AFIP images

Replacement by tan, firm tissue

Microscopic (histologic) description
  • Extensive and multifocal nodal involvement by thick walled hilar blood vessels, often with increased fibrous tissue
  • Nodal parenchyma has haphazard smooth muscle cells in sclerotic stroma
  • Starts in nodal hilum and extends toward cortex
  • May have admixed adipose tissue
  • No cellular pleomorphism, no necrosis, low mitotic rate
Microscopic (histologic) images

AFIP images

Various images



Case #118

CD3

CD20

Immunohistochemistry
Differential diagnosis
Back to top
Image 01 Image 02