Pathology
Images
Atlas of dermatopathology
Josef Feit, Hana Jedličková, Günter Burg, Luděk Matyska, Spasoje Radovanovic et al.
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+ Introduction
+ Literature
+ Support
+ Skin biopsy
+ Non-tumorous skin diseases
+ Skin tumors
+ Cysts of the skin and subcutis
+ Soft tissue lesions
+ Some lesions of the oral cavity
+ Dermatovenerology
+ Collection of histological slides by prof. Günter Burg
+ Collection of histological slides by prof. Werner Kempf
+ Collection of histological slides of dr. Ram Chandra Adhikari
Trichilemmal cyst
Clinical signs
  • location: scalp, face, back, genital
  • round, soft nodules, size up to several centimeters, solitary or multiple
  • clinicians call this cyst (together with epidermal cyst) atheroma
  • contents: yellowish masses, sometimes calcified
Pictures

Trichilemmal cysts and comedones of the nose, actinic elastosis: Cyst, sebaceous, Clinical picture (695)

Histology

Cyst, often multiple, filled with homogenous, eosinophilic mass. Lining is trichilemmal with gradual keratinisation. Cornified layer nor granular layer are present. Hairs are not present. Sometimes inflammation, dystrophic calcifications, cholesterol crystals and foamy macrophages.

Trichilemmal cyst (2019)

Trichilemmal cyst (2020)