Skin nonmelanocytic tumor
Vascular tumors
Hemangioma variants
Hobnail hemangioma
Author: Christopher S. Hale, M.D.
Last author update: 1 July 2012
Last staff update: 28 February 2023
Copyright: 2003-2023, PathologyOutlines.com, Inc.
PubMed Search: Hobnail hemangioma
Table of Contents
Definition / general | Case reports | Clinical images | Microscopic (histologic) description | Microscopic (histologic) images | Positive stains | Negative stains | Differential diagnosisCite this page: Hale CS. Hobnail hemangioma. PathologyOutlines.com website. https://www.pathologyoutlines.com/topic/skintumornonmelanocytichemangiomahobnail.html. Accessed May 29th, 2023.
Definition / general
- Endothelial cells protrude into vessel lumina
Case reports
- 7 year old boy with dark brown papule with ecchymotic halo on left upper back (Ann Dermatol 2011;23:539)
Clinical images
Contributed by Mark R. Wick, M.D.
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Microscopic (histologic) description
- Proliferation of irregular dissecting vascular channels lined by plump endothelial cells
Microscopic (histologic) images
Contributed by Mark R. Wick, M.D.
Hobnail hemangioma
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Targetoid hemosiderotic
Contributed by Asmaa Gaber Abdou, M.D. and Nancy Asaad, M.D.
Lower lip of female
Negative stains
Differential diagnosis
- Benign vascular tumors
- Kaposi sarcoma (patch stage)
- Progressive lymphangioma
