Superficial fibrin thrombi … and other findings: a review of the histopathology of human scabietic infections

Journal of Cutaneous Pathology
Hillary ElwoodSara C Shalin

Abstract

Cutaneous infection with the mite Sarcoptes scabiei var. hominis is associated with epidermal and dermal changes. After noting superficial fibrin thrombi in two biopsies with scabies mites, we comprehensively reviewed the histopathologic findings in scabietic infections to determine the frequency of this finding. Twenty five biopsies of scabies infection were retrieved from the archives of our institution; only cases containing scabietic mite parts or scybala were included. The microscopic features were documented. Nearly half (40%) of the cases showed fibrin thrombi within vessels of the superficial dermis. Other frequent findings included dermal eosinophils (88% of cases), epidermal spongiosis (76% of cases), lymphocyte atypia (64%), a superficial and deep infiltrate (52% of cases), dermal neutrophils (52%) and endothelial cell swelling (52%). Half of the cases contained polarizable mite elements. Less commonly encountered features included extravasated erythrocytes (44%), dermal edema (32%), pink 'pigtails'(28%), intraepidermal pustules (24%), plasma cells (20%) and vasculitis (4%). The pathologic characteristics of scabietic infection are wide-ranging. Spongiosis, superficial and deep inflammation, and dermal eosinophils an...Continue Reading

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Citations

Aug 12, 2017·Parasites & Vectors·Sajad A BhatShelley F Walton
Nov 26, 2019·The American Journal of Dermatopathology·Toshiyuki YamamotoKo-Ron Chen
Mar 26, 2021·Transactions of the Royal Society of Tropical Medicine and Hygiene·Emmanuel Edwar Siddig, Roderick Hay
Dec 20, 2021·Parasite Immunology·Umut GaziKosta Y Mumcuoglu

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