Figueroa-Ramos Grecia, Gatica-Torres Michelle, López-López Karla, Domínguez-Cherit Judith
Department of Dermatology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City, Mexico.
Tec Salud, Instituto Tecnológico y de Estudios Superiores de Monterrey, Mexico City, Mexico.
Skin Appendage Disord. 2023 Aug;9(4):291-295. doi: 10.1159/000529724. Epub 2023 Apr 26.
Keratoacanthoma (KA) is a group of tumors of epidermal origin with controversial nature. Subungual keratoacanthoma (SUKA) is a rare and destructive variant with more aggressive behavior. SUKA appears as a rapidly growing, painful tumor beneath the nail plate that rapidly progresses to a mass that can measure up to 2 cm. The toe location is unusual. The diagnosis must be made based on the correlation of clinical, radiological, and histopathological findings.
We present two cases of patients diagnosed with SUKAs with different clinical presentations which ranged from very typical to uncommon one. Both cases were treated with simple excision without recurrences.
SUKA is a rare subungual tumor. Nail bed location represents a more difficult diagnostic challenge. SUKA should be suspected in the context of persistent and progressive pain on a finger or toe, once more frequent painful tumors have been ruled out.
角化棘皮瘤（KA）是一组起源于表皮且性质存在争议的肿瘤。甲下角化棘皮瘤（SUKA）是一种罕见的、具有侵袭性的破坏性变种。SUKA表现为甲板下迅速生长的疼痛性肿瘤，可迅速发展为直径可达2厘米的肿块。其发生于趾部的情况较为少见。诊断必须基于临床、放射学和组织病理学检查结果的相关性。
我们报告两例诊断为SUKA的患者，其临床表现各异，从非常典型到不常见。两例均采用简单切除术治疗，无复发。
SUKA是一种罕见的甲下肿瘤。甲床部位的诊断更具挑战性。在排除了更常见的疼痛性肿瘤后，若手指或脚趾持续渐进性疼痛，应怀疑SUKA。
