2021.2.24.basal_cell_carcinoma

Pigmented plaque on the thigh: Atypical location of a basal cell carcinoma

Samia Mrabat, Zakia Douhi, Sara Elloudi, Hanane Baybay, Fatima Zahra Mernissi

Department of Dermatology, University Hospital Hassan II, Fes, Morocco


Corresponding author: Samia Mrabat, MD

Submission: 28.08.2020; Acceptance: 31.10.2020

DOI: 10.7241/ourd.20212.24

Cite this article: Mrabat S, Douhi Z, Elloudi S, Baybay H, Mernissi FZ. Pigmented plaque on the thigh: Atypical location of a basal cell carcinoma. Our Dermatol Online. 2021;12(2):195-196.

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Basal cell carcinoma (BCC) is the most common type of skin cancer, usually occurring on sun-exposed areas, such as the head and neck [1]. Chronic sun exposure is the cause of most of its cases but it may also develop on unexposed areas. BCC on extrafacial sites accounts for 17% of all basal cell carcinomas [2]. In these cases, dermoscopy can be especially helpful in diagnosis.

A 43-year-old female presented herself with a slowly growing, slightly itchy pigmented lesion on the right thigh persistent for the past two years. A clinical examination revealed a 2-cm well-limited pigmented plaque with excoriations on the periphery (Fig. 1). Dermoscopy showed multiple maple-leaf–like areas, digitiform structures with rosettes (Fig. 2). The lesion was subsequently excised with 6-mm margins. A histopathological report confirmed the diagnosis of superficial basal cell carcinoma with clear margins.

Figure 1: Clinical image showing a 2-cm well-limited pigmented plaque with excoriations on the periphery.
Figure 2: Dermoscopic image showing multiple maple-leaf–like areas, digitiform structures with rosettes.

Consent

The examination of the patient was conducted according to the principles of the Declaration of Helsinki.

The authors certify that they have obtained all appropriate patient consent forms, in which the patients gave their consent for images and other clinical information to be included in the journal. The patients understand that their names and initials will not be published and due effort will be made to conceal their identity, but that anonymity cannot be guaranteed.

REFERENCES

1. Roh SG, Park J, Song KH, Nam KH, Yun SK, Kim HU. Clinical and histopathological characteristics of extra-facial basal cell carcinoma:Analysis of 35 patients at the Chonbuk National University Hospital in Korea. Australas J Dermatol. 2014;55:e65-8.

2. Scrivener Y, Grosshans E, Cribier B. Variations of basal cell carcinomas according to gender, age, location and histopathological subtype. Br J Dermatol. 2002;147:41-7.

Notes

Source of Support: Nil,

Conflict of Interest: None declared.

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