Quenneville J G, Gossard D
Angiology. 1981 Jun;32(6):424-32. doi: 10.1177/000331978103200609.
Subungueal splinter hemorrhage (S.U.S.H.) has been reported in various conditions and may herald a serious systemic disease. It has been related to miscellaneous conditions such as: subacute bacterial endocarditis, severe rheumatoid arthritis, uninfected mitral stenosis, trichinosis, peptic ulcer, hypertension, neoplasm, trauma, and in some cases, is considered idiopathic. Some dermatologic conditions such as psoriasis, dermatitis, and fungal infections may also produce S.U.S.H. It consists of "a homogeneous mass of blood in a layer of squamous cells, adherent to the under surface of the nail, considered to be of embolic origin." In a brief review of pertinent medical literature on thromboangiitis obliterans, we were unable to find a description of its occurrence in this disease. The earliest lesions described in this condition are "painful vesicles on the pulp of digits with intense hyperemia and hypersensitivity of the surrounding skin." It is our opinion that S.U.S.H. is an earlier and quite useful sign of arterial involvement as seen in the following cases observed in our vascular disease section.
甲下裂片形出血（S.U.S.H.）已在多种病症中被报道，且可能预示着一种严重的全身性疾病。它与多种病症相关，如：亚急性细菌性心内膜炎、重度类风湿性关节炎、未感染的二尖瓣狭窄、旋毛虫病、消化性溃疡、高血压、肿瘤、外伤，在某些情况下，被认为是特发性的。一些皮肤病，如牛皮癣、皮炎和真菌感染也可能导致甲下裂片形出血。它由“一层鳞状细胞内的均匀血液团块组成，附着于指甲的下表面，被认为是栓塞性起源”。在对有关血栓闭塞性脉管炎的相关医学文献进行简要综述时，我们未能找到关于其在该疾病中出现情况的描述。该病症中最早描述的病变是“手指指腹上的疼痛性水疱，周围皮肤有强烈充血和超敏反应”。我们认为，如下在我们血管疾病科观察到的病例所示，甲下裂片形出血是动脉受累的一个较早且相当有用的体征。
