Dermal Cylindroma

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Retrieved
2021-01-18
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In dermatologic pathology, a dermal cylindroma, also dermal eccrine cylindroma or cutaneous cylindroma:666) and (less specifically) cylindroma, is a benign adnexal tumor that occurs on the scalp and forehead.

Multiple cylindromas may grow together in a "hat-like" configuration, sometimes referred to as a turban tumor. Cylindromas are uncommon dysplasias of skin appendages.

Histology

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 cell 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

  • Micrograph of dermal cylindroma in H&E stain.

  • Dermal cylindroma. Puzzle-like distribution of tumour foci.

  • Dermal cylindroma. Hyaline droplets visible in lobules.

  • Dermal cylindroma, micronodular type.

See also

  • Spiradenoma
  • Malignant acrospiroma