Dermatology: Practical and Conceptual Dermatology Practical & Conceptual Image Letter | Dermatol Pract Concept. 2021;11(3): e 2021052 1 An Unexpected Shade of Yellow Ângela Roda1, André Oliveira2 1 Department of Dermatology, Hospital de Santa Maria, Centro Hospitalar Universitário Lisboa Norte, Lisboa, Portugal 2 Dermatology Center, Hospital CUF Descobertas, Lisboa, Portugal Key words: basal cell carcinoma, skin cancer, cholesterol, dermoscopy, histopathology Citation: Roda A, Oliveira A. An unexpected shade of yellow. Dermatol Pract Concept. 2021;11(3): e 2021052. DOI: https://doi.org/10.5826/dpc.1103a52 Accepted: December 10, 2020; Published: July 8, 2021 Copyright: ©2021 Roda and Oliveira. This is an open-access article distributed under the terms of the Creative Commons Attribution License BY-NC-4.0, which permits unrestricted noncommercial use, distribution, and reproduction in any medium, provided the original authors and source are credited Funding: None Competing interests: None Authorship: Both authors have contributed significantly to this publication Corresponding author: Ângela Roda, MD. Hospital de Santa Maria. Av. Prof. Egas Moniz, 1649-035 Lisboa, Portugal. Email: angela.neto. roda@gmail.com Case Presentation A 45-year-old woman presented with a history of a slowly growing asymptomatic solitary yellowish-red papule on the face. Dermoscopy revealed yellow globules over a yellow struc- tureless area at the level of the upper portion of the lesion, in addition to arborizing vessels (AV). The lower half of the lesion presented a large blue ovoid nest and red-purple areas suggesting traumatic hemorrhage (Figure 1). Histopathological examination of the skin lesion revealed a basal cell carcinoma (BCC) with cholesterol crystal deposition. Teaching Point When evaluating skin tumors, color is one of the most import- ant clues for diagnosis. In dermoscopy, the yellow color has been associated with the content of keratin, calcium, and lipids. Yellowish structures, including milia-like cysts and yellow lobular-like structures, have already been described in BCCs Figure 1. Basal cell carcinoma with cholesterol crystal deposition, dermoscopy. Yellow globules over a yellow structureless area and thin arborizing vessels are observed mainly in the upper half of the lesion. The lower portion of the lesion presents a large blue ovoid nest on the left side and a red-purple background, suggesting trau- matic hemorrhage. 2 Image Letter | Dermatol Pract Concept. 2021;11(3): e 2021052 [1]. Of particular interest, in our case, dermoscopic yellow structures corresponded histologically to cholesterol clefts. Cholesterol clefts have rarely been reported in cutaneous tumors other than lipid-rich tumors. However, cholesterol clefts may occur in BCC and have been associated with long-lasting disease or microtrauma [2]. References 1. 1. Bellucci C, Arginelli F, Bassoli S, et al. Dermoscopic yellow structures in basal cell carcinoma. J Eur Acad Dermatol Venereol. 2014;28(5):651-4. DOI: 10.1111/jdv.12092. PMID: 23332004 2. 2. Kim HJ, Park SH, Lee SK, et al. Cholesterol Clefts in Basal Cell Carcinoma: An Under-Recognized Association. Am J Dermatopathol. 2018;40(8):594-596. DOI: 10.1097/ DAD.0000000000001147. PMID: 29570130