Dermal cylindroma

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Dermal cylindroma
Dermal cylindroma intermed mag.jpg
Micrograph of a dermal cylindroma. H&E stain.
Classification and external resources
ICD-O M8200/3
eMedicine derm/94
MeSH D003528

In dermatologic pathology, a dermal cylindroma, also dermal eccrine cylindroma[1]:666) and (less specifically) cylindroma, is a benign adnexal tumor,[2] which occurs on the scalp and forehead.

Multiple cylindromas may grow together in a "hat-like" configuration, the so-called "turban tumor." Cylindromas are uncommon dysplasias of skin appendages.[3]


Dermal cylindromas are:

  • dermal lesions consisting of nests of cells that are surrounded by hyaline (i.e. glassy, eosinophilic, acellular) material and have:
    • hyperchromatic nuclei that may palisade (columnar nuclei arranged around the periphery of the cells nests - with their short axis tangential to the nest periphery), and
    • cells with lighter staining ovoid nuclei at their centre.

They lack of a significant number of lymphocytes; this differentiates them from spiradenomas.

Additional images[edit]

See also[edit]


  1. ^ James, William D.; Berger, Timothy G.; et al. (2006). Andrews' Diseases of the Skin: clinical Dermatology. Saunders Elsevier. ISBN 0-7216-2921-0. 
  2. ^ "Cylindroma" at Dorland's Medical Dictionary
  3. ^ Cylindroma at eMedicine