A Case Report of Basal Cell Carcinoma in a Non-Sun-Exposed Area: A Rare Presentation Mimicking Recurrent Perianal Abscess.

Audrey V. Carr,Fouad R. Zakka,Steven Schechter,Edward Feller,Rogers C. Griffith

doi:10.1155/2018/9021289

Audrey V. Carr, Fouad R. Zakka + Show 3 more

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https://doi.org/10.1155/2018/9021289

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Basal cell carcinoma (BCC), a common malignancy, arises most often in sun-exposed areas but does rarely occur in non-sun-exposed sites. Prior tissue injury, especially sharp trauma and chronic inflammation, increases the risk of BCC. We describe a 66-year-old male patient with recurrent perianal abscesses who was found to have a large pigmented basal cell carcinoma. The mass was excised without recurrence at two-year follow-up. Perianal BCC is commonly larger at the time of diagnosis than tumors in sun-exposed sites, likely related to delay in diagnosis. Increased size can lead to increased surgical complexity and more pronounced effects on nearby structures. Early detection is important for optimal patient outcomes. In selected patients presenting with a perianal mass, basal cell carcinoma should be included on the differential diagnosis.

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Basal cell carcinoma (BCC) is the most common cutaneous malignancy and accounts for approximately 80% of all nonmelanoma skin cancers [1]
Three series including 81 cases of perianal BCC have been reported [5,6,7], and less than 15 individual case reports have been described in the literature [8,9,10,11,12,13,14,15,16,17]
Perianal BCCs are noted to be larger in size than those found in more typical, sun-exposed locations [8, 18]

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Introduction

Basal cell carcinoma (BCC) is the most common cutaneous malignancy and accounts for approximately 80% of all nonmelanoma skin cancers [1]. Sun exposure, and male gender [2] These tumors typically arise in sun-exposed areas; rarely, they occur in nonexposed areas and have been found on the trunk, genitals, nails, axilla, nipple, or sole of the foot [3, 4]. These tumors can occur in the perianal region. Treatment with surgical excision is typically curative These cancers rarely metastasize, basal cell carcinoma can invade nearby structures. We describe a case of basal cell carcinoma arising in a non-sun-exposed area to alert clinicians to consider BCC in the differential diagnosis when encountering soft tissue perianal masses

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