Betti R, Inselvini E, Crosti C
Clinica Dermatologica IV, Ospedale San Paolo, Milan, Italy.
Am J Dermatopathol. 1994 Oct;16(5):554-6. doi: 10.1097/00000372-199410000-00019.
We report a case of speckled lentiginous nevus with extensive unilateral distribution in a 53-year-old man. The lesions involved the left back, extending from the midline anteriorly to the thorax, arm, and forearm. The background pigmentary patch covered only the back and upper arm. Histologic examination revealed a lentiginous pattern as well as a congenital nevocytic pattern, even in the areas where the background was nontanned skin. This combined clinical pattern in the same patient fits the descriptions for both the usual and unusual speckled lentiginous nevus. Cases with variants of extensive unilateral distribution are infrequent and pathologists should pay particular attention to them because of the possibility of their malignant transformation.
我们报告一例53岁男性的斑点状小痣，其具有广泛的单侧分布。病变累及左背部，从前中线延伸至胸部、手臂和前臂。背景色素沉着斑仅覆盖背部和上臂。组织学检查显示为雀斑样模式以及先天性痣细胞模式，即使在背景为未晒黑皮肤的区域也是如此。同一患者的这种联合临床模式符合常见和不常见斑点状小痣的描述。广泛单侧分布变异型的病例并不常见，病理学家应特别关注它们，因为它们有恶变的可能性。
