| Dermal cylindroma | |
|---|---|
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| Micrograph of a dermal cylindroma. H&E stain. |
In dermatologic pathology, a dermal cylindroma, also dermal eccrine cylindroma or cutaneous cylindroma) 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.
