Misplaced Pages

Dermal cylindroma
Dermal cylindroma treated with X-rays without recurrence

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 a dermal cylindroma in H&E stain.
• 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

References

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: Background, Pathophysiology, Epidemiology". 14 July 2021.
4. Cylindroma at eMedicine

External links

• Epidermal nevi, neoplasms, and cysts