Home > E. Pathology by systems > Skin > trichoepithelioma
trichoepithelioma
Friday 17 June 2011
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Definition : Trichoepithelioma is a benign neoplasm that shares both clinical and histological features with basal cell carcinoma.
Images
Trichoepithelioma
- https://twitter.com/RyanHickMD/status/720951675310047232
- https://twitter.com/mariaramir/status/714933405629198340
- https://twitter.com/JMGardnerMD/status/599210445744943104
- https://twitter.com/JMGardnerMD/status/599200913853587458
- https://twitter.com/juanbarcia/status/566378732622209024
- https://twitter.com/TheSagePatel/status/529712828757061632
- https://twitter.com/drshahinhameed/status/742390802496684033
stroma-stroma retraction in trichoepithelioma
small trichoepithelioma
desmoplastic trichoepithelioma : cords/nests basaloid cells, sclerotic stroma, horn cysts with keratin
- https://twitter.com/mariaramir/status/714933005920378882
- https://twitter.com/JMGardnerMD/status/539428205296640000
Trichoepithelioma CK20+ Merkel cells (usually absent in BCC)
Stromal hyaline droplets in a trichoepithelioma
Synopsis
multilobular basaloid tumor
palisaded nuclei
fibrocellular stroma
hair follicle tumor with basaloid cells in nests surrounded by dense fibrous stroma and spindle cells
mucin pools may be present within basaloid nests
lack of clefting distinguishes from basal cell carcinoma
Differential diagnosis
basal cell carcinoma (BCC)
- In Trichoepithelioma: CK20+ Merkel cells (usually absent in BCC)
- https://twitter.com/DermpathMGH/status/745579787800952832
Digital cases
UI:910 - Trichoepithelioma
See also
cutaenous tumors
References
Diagnostic utility of immunohistochemistry in distinguishing trichoepithelioma and basal cell carcinoma: evaluation using tissue microarray samples. Tebcherani AJ, de Andrade HF Jr, Sotto MN. Mod Pathol. 2012 Jun 8. PMID: 22684216