Premalignant fibroepithelioma C44.L

Author: Prof. Dr. med. Peter Altmeyer

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Last updated on: 01.02.2022

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Synonym(s)

Basal cell carcinoma; basal cell carcinoma fibroepithelial; fibroepithelial; Fibroepithelial tumor; fibroepithelioma of pinkus; Fibroepithelioma Pinkus; Fibroepithelioma (Pinkus); Pinkus tumor; premalignant fibroepithelial tumor of the skin; Premalignant fibroepithelioma

History
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Pinkus, 1953

Definition
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Histologically and immunohistologically defined variant of superficial basal cell carcinoma with pronounced stromal development.

Recent studies suggest an intermediate stage between basal cell carcinoma and trichoblastoma. Both tumors originate from the same cell type but differ in differentiation.

Localization
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Mainly lumbosacral, lower abdomen, inguinal and inner thigh area.

Clinical features
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Single or several, usually flat raised, skin-coloured or delicately reddened, moderately rough, 0.5-2.0 cm plaques, rarely ulceration.

Histology
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Network of fine epithelial strands, only a few cell layers thick, filled with dense, connective tissue stroma. In numerous places bud-like epithelial outgrowths with palisade position of the marginal cells. Immunohistologically, the tumorous epithelial tumor parts do not express PHLDA1, an expression behavior characteristic of basal cell carcinoma.

Differential diagnosis
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Therapy
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Corresponding to superficial basal cell carcinoma. Excision in sano. If necessary also curettage and after-treatment with 5-fluorouracil ointment(e.g. Efudix) once/day for 3-5 days under occlusion.

Progression/forecast
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Inexpensive, curable by excision in sano.

Literature
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  1. Deichmann M et al (2003) Adhesion molecules CD171 (L1CAM) and CD24 are expressed by primary neuroendocrine carcinomas of the skin (Merkel cell carcinomas). J Cutan Pathol 30: 363-368
  2. Pinkus H (1953) Premalignant fibroepithelial tumors of the skin. Arch Dermatol Syph 67: 598-615.
  3. Sellheyer K et al (2012) Fibroepithelioma of Pinkus is a true basal cell carcinoma developing in association with a newly identified tumour-specific type of epidermal hyperplasia. Br J Dermatol. 166):88-97
  4. Tarallo M et al (2011) Fibroepithelioma of Pinkus: variant of basal cell carcinoma or trichoblastoma? Case report. G Chir 32:326-328
  5. Haddock ES et al (2016) Fibroepithelioma of Pinkus Revisited. Dermatol Ther (Heidelb). 6: 347-362
  6. Bowen AR et al (2005) Fibroepithelioma of pinkus is a fenestrated trichoblastoma Am J Dermatopathol 27:149-154.

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Last updated on: 01.02.2022