HistoryThis section has been translated automatically.
DefinitionThis section has been translated automatically.
Biphasic (epithelial-mesenchymal) adnexal tumour with differentiation towards follicular germ cells and the specific follicular stroma. Conventional tricheopthelioma (also: cribriform trichoblastoma) is included in the trichoblastoma group. It may be solitary and/or multiple. See also adnexal tumours with hair follicle differentiation. It is the predominant tumour type in Brooke-Spiegler syndrome. At present, the question as to what extent Brooke-Spiegler syndrome and the syndrome of multiple familial trichoepitheliomas belong to an identical group of diseases has not been completely clarified. Some authors also refer to the syndrome of multiple trichoepitheliomas as Brooke syndrome and distinguish Brooke-Spiegler syndrome as a syndrome with multiple trichoepitheliomas, cylindromas and spiradenomas.
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EtiopathogenesisThis section has been translated automatically.
Autosomal dominant inheritance in multiple familial trichoepitheliomas, see Brooke-Spiegler syndrome.
- In type I a heterogeneous mutation is found in the CYLD gene (16q12.1 - allelic: familial cylindromatosis, Brooke-Spiegler syndrome).
- In type II there is a mutation in a gene localized at 9p21.
ManifestationThis section has been translated automatically.
Often occurring in adolescence.
LocalizationThis section has been translated automatically.
Clinical featuresThis section has been translated automatically.
Mostly multiple, symmetrically arranged, completely painless and irritation-free, rough, hemispherical, 0.2-0.5 cm in size, usually glassy, skin-coloured, rarely red, firm nodules, the surface of which is sometimes covered with telangiectasias.
In case of multiple occurrence (which is the normal case), combinations with hemangiomas, dental cysts, cylindromas, spiradenomas (see also Brooke-Spiegler syndrome) and ovarian fibromas are possible.
HistologyThis section has been translated automatically.
Proliferation of basal cells, epithelial or prickly cells with basaloid strands, which occasionally show pilous formations, restricted to the dermis. The abundant connective tissue stroma resembles follicular papillae and the perifollicular binovular sheath. Focally, the stroma may dominate the histological picture. Immunohistology: Trichoepitheliomas in contrast to basal cell carcinoma show a diffuse staining by the antibody PHLDA1. Basal cell carcinoma: PHLDA1-negative.
Differential diagnosisThis section has been translated automatically.
Basal cell carcinoma: No symmetry in appearance, no preferential disseminated nasolabial involvement pattern. Histology: Basal cell carcinoma PHLDA1 negative.
Cylindromas: Either solitary or multiple occurrences. V.a. capillitium; nodules or nodes are significantly larger. Brooke-Spiegler syndrome should be distinguished from solitary cylindromas (multiple cylindromas possibly in combination with other adnexal tumors).
Syringoma: Mostly occurring in plural, barely 0.2 cm large skin-colored nodules, mostly localized in the eyelid region.
Adenoma sebaceum: Multiple reddish-brownish, rarely skin-colored, soft, 0.2-0 cm, asymptomatic papules. Acneiform picture.
Operative therapieThis section has been translated automatically.
Progression/forecastThis section has been translated automatically.
Favourable; development of basal cell carcinoma possible. Transformation into trichoblastic carcinoma is an absolute rarity (2 cases in the world literature, see case report).
Note(s)This section has been translated automatically.
According to the currently valid WHO classification, the "classical trichoepithelioma" is called cribriform trichblastoma or conventional trichoepithelioma.
Case report(s)This section has been translated automatically.
A 63-year-old man presented with an ulcerated nodular lesion over the glabella and multiple asymptomatic nodular lesions over the face, scalp, chest, and limbs. His father, grandfather and paternal cousins suffered from similar nlesions. Histopathological examination revealed trichoblastic carcinoma arising from trichoepithelioma over glabella. Thus, the diagnosis of Brooke's syndrome with malignant transformation of trichoepithelioma was made. A trichoblastic carcinoma arising from a trichoepithelioma in a patient with Brooke's disease is extremely rare, with only one case described in the literature (Jayalakshmy P et al 2018).
LiteratureThis section has been translated automatically.
- Ancell H (1842) History of a remarkable case of tumours developed on the head and face. Medico-Chirurgical Transactions (London) 25: 227-247
- Ardigo M et al. (2007) Dermoscopic and reflectance confocal microscope findings of trichoepithelioma.
- Dermatology 354:358.
- Braun-Falco M, Hein R, Ring J (2001) Cylindrospiradenomas in Brooke-Spiegler syndrome. Dermatologist 52: 1021-1025
- Brooke HAG (1892) Epithelioma adenoides cysticum. British Journal of Dermatology (Oxford) 4: 269-286.
- Clarke J et al (2002) Multiple familial trichoepitheliomas: a folliculosebaceous-apocrine genodermatosis. Am J Dermatopathol 24: 402-405
- Fordyce JA (1892) Multiple benign cystic epithelioma of the skin. J Cutan Genitourin Dis (Chicago) 10: 459-473.
- Hu G et al (2003) A novel missense mutation in CYLD in a family with Brooke-Spiegler syndrome. J Invest Dermatol 121: 732-734
- Jayalakshmy P et al (2018) Trichoblastic carcinoma arising in trichoepithelioma in Brooke-Spiegler syndrome. PMID: doi: 10.4103/IJPM.IJPM_639_17.
- Kanda A et al (2003) A case of multiple trichoepithelioma with an unusual appearance. Br J Dermatol 149: 674-675
- Korting HC, Konz B (1982) Coincidence of multiple cylindroma and trichoepitheliomas (Brooke-Spiegler syndrome). Dermatologist 33: 34-46
- Spiegler E (1899) On endotheliomas of the skin. Arch Dermatol Syphilis (Berlin) 50: 163-176.
- Winkelmann RK et al (1980) Trichoepitheliomas. Dermatologist 31: 527-530
- Yamamoto O et al (2002) Immunohistochemical and ultrastructural observations of desmoplastic trichoepithelioma with a special reference to a morphological comparison with normal apocrine acrosyringeum. J Cutan Pathol 29: 15-26
Incoming links (21)Adenoma sebaceum; Adnextumors of the skin (overview); Brooke's disease; Brooke-spiegler syndrome; Colloidalmilium; Cowden syndrome; Cyld; Epithelioma adenoides cysticum; Mantelom; Phlda1; ... Show all
Outgoing links (15)Adenoma sebaceum; Adnexal tumors with hair follicle differentiation; Basal cell carcinoma (overview); Brooke-spiegler syndrome; Co2 laser; Cryosurgery; Cutaneous vascular tumors (overview); Cylindrome; Dermabrasion; Erbium yag laser; ... Show all
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