Hidano A, Mizuguchi M, Higaki Y
Ann Dermatol Venereol. 1984;111(12):1063-71.
We describe 23 cases of unusual brownish pigmentation occurring over the bony tissues such as clavicle, scapula or vertebrae. There were 19 females and 4 males. The age ranged from 18 to 59, mostly between 20 and 35 years. Since the first observation in 1977, cases gradually increased. The pigmentation usually showed ripple pattern on the upper back and clavicular region, zebra-like pattern over the ribs and postage-stamp-like macule over the vertebral column. Although there was no inflammatory sign such as itching or scaling, histology revealed postinflammatory melanin deposit in the upper dermis. Exceptional detection of amyloid deposit in the papillary layer in one case could be secondary to the slight epidermal damage actually disappeared. The general condition was not affected, and laboratory data remained within normal limits. This unique melanosis should be separated from other pigmentary disorders and macular amyloidosis. We would like to propose the name of friction melanosis, because this condition should be intimately related with the repeated friction by nylon towel or brush, widely used by young peoples in the bathroom.
我们描述了23例发生于锁骨、肩胛骨或椎骨等骨组织上的异常褐色色素沉着病例。其中女性19例，男性4例。年龄范围为18至59岁，多数在20至35岁之间。自1977年首次观察到以来，病例逐渐增多。色素沉着通常在上背部和锁骨区域呈波纹状，肋骨上呈斑马样，脊柱上呈邮票样斑疹。虽然没有瘙痒或脱屑等炎症迹象，但组织学显示真皮上层有炎症后黑色素沉积。1例在乳头层异常检测到淀粉样沉积物，可能继发于实际已消失的轻微表皮损伤。一般情况未受影响，实验室数据仍在正常范围内。这种独特的黑变病应与其他色素沉着障碍和斑状淀粉样变相鉴别。我们建议将其命名为摩擦性黑变病，因为这种情况应与年轻人在浴室广泛使用的尼龙毛巾或刷子反复摩擦密切相关。
