Skin-nontumor / Clinical Dermatology
Reviewer: Mowafak Hamodat, MB.CH.B, MSc., FRCPC, Eastern Health, St. Johns, Canada (see Reviewers page)
Revised: 12 July 2011, last major update July 2011
Copyright: (c) 2002-2011, PathologyOutlines.com, Inc.
● Blister that forms due to damage to subepidermal vessels and tissue without disruption of epidermis
● Blood blister-like aneurysm: has thin wall, like a blood blister; usually arises in posterior wall of internal carotid artery
● Due to damage to subepidermal tissue and blood vessels, without piercing the skin; fluid is lymph and blood
● Usually due to physical injury
● Sudden appearance of lesions on oral mucosa may be diagnostic of angina bullosa hemorrhagica (Minerva Stomatol 2010;59:139, eMedicine)
● None or symptomatic (elevate, ice, soak)
● Subcorneal vesicular lesion with erythrocytes trapped beneath thick stratum corneum of toes or fingers
● Coagulation disorder
End of Skin-nontumor / Clinical Dermatology > Blistering disorders > Blood blister
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