ICD-11 code : EK70.1;
Preferred Label : Trichilemmal cyst;
ICD-11 definition : A trichilemmal (pilar) cyst is a common, typically non-tender, intradermal or subcutaneous
cyst. The cysts are typically confined to the scalp and are often multiple. They usually
occur sporadically but may be inherited in an autosomal dominant manner. They are
derived from the outer root sheath of the hair follicle and as such contain keratin
or keratin degradation products. Rarely, they may undergo malignant transformation.;
ICD-11 synonym : Wen; Isthmus catagen cyst; Pilar cyst; Sebaceous cyst of scalp; Follicular isthmus cyst;
ICD-11 inclusion : Pilar cyst;
Origin ID : 150930710;
Automatic exact mappings (from CISMeF team)
- Currated CISMeF NLP mapping
- ICD-10 Mapping
A trichilemmal (pilar) cyst is a common, typically non-tender, intradermal or subcutaneous
cyst. The cysts are typically confined to the scalp and are often multiple. They usually
occur sporadically but may be inherited in an autosomal dominant manner. They are
derived from the outer root sheath of the hair follicle and as such contain keratin
or keratin degradation products. Rarely, they may undergo malignant transformation.
