Abstract
A 67-year-old man of Chinese descent presented with a painless nodular lesion that had been present on his right forearm for the previous 3 months. A single, well-defined, dome-shaped, firm nodule with a central keratin plug surrounded by erythema was noted. Keratoacanthoma with secondary bacterial infection was suspected and the patient underwent an excision biopsy. Biopsy of the nodule and immunohistochemical staining supported a diagnosis of nodular malignant melanoma. It should be noted both that nodular malignant melanoma may present with a wide variety of clinical appearances, and that the lack of melanin pigment in nodular malignant melanoma may hinder the diagnosis of this aggressive tumour.
Publication details
- DOI
- 10.18295/2075-0528.1389
- Journal
- Sultan Qaboos University Medical Journal, 12(3), 360-363
- Publisher
- Sultan Qaboos University
- Open access
- Gold open access
- License
- CC BY-ND 4.0
Cite this article
APA 7
Muthupalaniappen, L., Das, S., Ali, N. M., & AM, S. (2025). Nodular Melanoma Mimicking Keratoacanthoma: Lessons to learn. Sultan Qaboos University Medical Journal, 12(3), 360-363. https://doi.org/10.18295/2075-0528.1389
MLA 9
Muthupalaniappen, Leelavathi, et al. "Nodular Melanoma Mimicking Keratoacanthoma: Lessons to learn." Sultan Qaboos University Medical Journal, vol. 12, no. 3, 2025, pp. 360-363. https://doi.org/10.18295/2075-0528.1389.
Chicago (author–date)
Muthupalaniappen, Leelavathi, Srijit Das, Norazirah Md Ali, and Siti AM. 2025. "Nodular Melanoma Mimicking Keratoacanthoma: Lessons to learn." Sultan Qaboos University Medical Journal 12 (3): 360-363. https://doi.org/10.18295/2075-0528.1389.
Harvard
Muthupalaniappen, L., Das, S., Ali, N. M. and AM, S. (2025) 'Nodular Melanoma Mimicking Keratoacanthoma: Lessons to learn', Sultan Qaboos University Medical Journal, 12(3), pp. 360-363. doi:10.18295/2075-0528.1389.
Vancouver
Muthupalaniappen L, Das S, Ali NM, AM S. Nodular Melanoma Mimicking Keratoacanthoma: Lessons to learn. Sultan Qaboos University Medical Journal. 2025;12(3):360-363. doi:10.18295/2075-0528.1389
IEEE
L. Muthupalaniappen, S. Das, N. M. Ali, and S. AM, "Nodular Melanoma Mimicking Keratoacanthoma: Lessons to learn," Sultan Qaboos University Medical Journal, vol. 12, no. 3, pp. 360-363, 2025, doi: 10.18295/2075-0528.1389.