Dermal cylindroma

Micrograph of a dermal cylindroma. H&E stain.

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

Multiple cylindromas may grow together in a "hat-like" configuration, sometimes referred to as a turban tumor.[3] Cylindromas are uncommon dysplasias of skin appendages.[4]

Dermal cylindroma of the scalp.

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.

* 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[edit | edit source]

* Spiradenoma
* Malignant acrospiroma

## References[edit | edit source]

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. Archived from the original on 8 October 2017. Retrieved 21 July 2022. `{{cite journal}}`: Cite journal requires `|journal=` (help)
4. ↑ Cylindroma at eMedicine

## External links[edit | edit source]

Classification|

* ICD-O: M8200/3
* MeSH: D003528

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External resources|

* eMedicine: derm/94

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Glandular and epithelial cancer

Epithelium|

| Papilloma/carcinoma|

* Small-cell carcinoma
* Combined small-cell carcinoma
* Verrucous carcinoma
* Squamous cell carcinoma
* Basal-cell carcinoma
* Transitional cell carcinoma
* Inverted papilloma

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Complex epithelial|

* Warthin's tumor
* Thymoma
* Bartholin gland carcinoma

Glands|

| Adenomas/
adenocarcinomas|

| Gastrointestinal|

* tract: Linitis plastica
* Familial adenomatous polyposis

* pancreas
* Insulinoma
* Glucagonoma
* Gastrinoma
* VIPoma
* Somatostatinoma

* Cholangiocarcinoma
* Klatskin tumor
* Hepatocellular adenoma/Hepatocellular carcinoma

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Urogenital|

* Renal cell carcinoma
* Endometrioid tumor
* Renal oncocytoma

Endocrine|

* Prolactinoma
* Multiple endocrine neoplasia
* Adrenocortical adenoma/Adrenocortical carcinoma
* Hürthle cell

Other/multiple|

* Neuroendocrine tumor
* Carcinoid
* Adenoid cystic carcinoma
* Oncocytoma
* Clear-cell adenocarcinoma
* Apudoma
* Cylindroma
* Papillary hidradenoma

Adnexal and
skin appendage|

* sweat gland
* Hidrocystoma
* Syringoma
* Syringocystadenoma papilliferum

Cystic, mucinous,
and serous|

| Cystic general|

* Cystadenoma/Cystadenocarcinoma

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Mucinous|

* Signet ring cell carcinoma
* Krukenberg tumor
* Mucinous cystadenoma / Mucinous cystadenocarcinoma
* Pseudomyxoma peritonei
* Mucoepidermoid carcinoma

Serous|

* Ovarian serous cystadenoma / Pancreatic serous cystadenoma / Serous cystadenocarcinoma / Papillary serous cystadenocarcinoma

Ductal, lobular,
and medullary|

| Ductal carcinoma|

* Mammary ductal carcinoma
* Pancreatic ductal carcinoma
* Comedocarcinoma
* Paget's disease of the breast / Extramammary Paget's disease

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Lobular carcinoma|

* Lobular carcinoma in situ
* Invasive lobular carcinoma

Medullary carcinoma|

* Medullary carcinoma of the breast
* Medullary thyroid cancer

Acinar cell|

* Acinic cell carcinoma

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Tumors and associated structures

Glands|

| Sweat gland|

| Eccrine|

* Papillary eccrine adenoma
* Eccrine carcinoma
* Eccrine nevus
* Syringofibroadenoma
* Spiradenoma

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Apocrine|

* Cylindroma
* Dermal cylindroma
* Syringocystadenoma papilliferum
* Papillary hidradenoma
* Hidrocystoma
* Apocrine gland carcinoma
* Apocrine nevus

Eccrine/apocrine|

* Syringoma
* Hidradenoma or Acrospiroma/Hidradenocarcinoma
* Ceruminous adenoma

Sebaceous gland|

* Nevus sebaceous
* Muir–Torre syndrome
* Sebaceous carcinoma
* Sebaceous adenoma
* Sebaceoma
* Sebaceous nevus syndrome
* Sebaceous hyperplasia
* Mantleoma

Hair|

* Pilomatricoma/Malignant pilomatricoma
* Trichoepithelioma
* Multiple familial trichoepithelioma
* Solitary trichoepithelioma
* Desmoplastic trichoepithelioma
* Generalized trichoepithelioma
* Trichodiscoma
* Trichoblastoma
* Fibrofolliculoma
* Trichilemmoma
* Trichilemmal carcinoma
* Proliferating trichilemmal cyst
* Giant solitary trichoepithelioma
* Trichoadenoma
* Trichofolliculoma
* Dilated pore

* Isthmicoma
* Fibrofolliculoma
* Perifollicular fibroma
* Birt–Hogg–Dubé syndrome

Hamartoma|

* Basaloid follicular hamartoma
* Folliculosebaceous cystic hamartoma
* Folliculosebaceous-apocrine hamartoma

Nails|

* Neoplasms of the nailbed

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