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Clinical and Dermoscopic Patterns of Basal Cell Carcinoma and Its Mimickers in Skin of Color: A Practical Summary.
Medicina (Kaunas)
August 2024
Institute of Dermatology, Department of Medical Area, University of Udine, 33100 Udine, Italy.
Article Synopsis
- Diagnosing basal cell carcinoma (BCC) in individuals with darker skin tones (dark phototypes IV-VI) is difficult due to varied presentations and fewer identifiable clues; dermoscopy can aid in identifying BCC in these patients.
- This review provides a comparison of BCC's clinical and dermoscopic patterns in people of color to those in lighter-skinned individuals, identifying common mimickers like squamous cell carcinoma and melanoma.
- Key dermoscopic features of BCC in darker skin include blue, black, and gray dots, with arborizing vessels being the primary indicator, while unique conditions in darker skin such as dermatosis papulosa nigra are also considered in differential diagnosis.
Article Synopsis
- A patient with a decade-long history of blue-black skin lesions attributed to skin-lightening creams was diagnosed with exogenous ochronosis (EO), despite an inconclusive biopsy.
- EO is characterized by hyperpigmentation from hydroquinone products, commonly affecting Black populations due to widespread use.
- Accurate recognition of EO's clinical features by dermatologists is essential for early diagnosis and can prevent progression to more severe skin symptoms.
Blue-black hyperpigmented patches on the cheeks.
JAAD Case Rep
January 2022
Department of Dermatology, Georgetown University MedStar Washington Hospital Center, Washington, DC.
A case of ochronosis successfully treated with the picosecond laser.
J Cosmet Dermatol
October 2019
Clínica Dermatológica Isela Méndez, Ciudad de México, México.
Exogenous ochronosis is a cutaneous condition characterized by blue-black pigmentation resulting as a complication of long-term application of skin-lightening creams containing hydroquinone and other substances such as quinine, phenol and mercury derivatives. We report a case of a 55-year-old woman who developed exogenous ochronosis as a result of prolonged use of topical hydroquinone for 5 years, characterized by greyish hyperpigmented patches on the nose and cheeks. The diagnosis was confirmed histologically.
View Article and Find Full Text PDFThe limitations of dermoscopy: false-positive and false-negative tumours.
J Eur Acad Dermatol Venereol
June 2018
First Department of Dermatology, Aristotle University, Thessaloniki, Greece.
Dermoscopy has been documented to increase the diagnostic accuracy of clinicians evaluating skin tumours, improving their ability to detect skin cancer and better recognize benign moles. However, dermoscopically 'false-positive' and 'false-negative' tumours do exist. False-positive diagnosis usually leads to unnecessary excisions.
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