Mirowitz S A
Department of Radiology, Jewish Hospital, Washington University Medical Center, St Louis, MO.
Radiology. 1993 Sep;188(3):689-93. doi: 10.1148/radiology.188.3.8351334.
The occurrence of hematopoietic bone marrow within the axial skeleton and meta-diaphyseal regions of long bones is well known. However, it has been generally accepted that hematopoietic marrow is not present within the epiphysis of long bones in normal adults. This study involved evaluation of marrow patterns in 96 patients presenting for shoulder magnetic resonance (MR) imaging examinations. Residual hematopoietic marrow was present within the proximal humeral metaphysis in 99% of patients and extended into the epiphysis in 62%. Epiphyseal hematopoietic marrow was more prominent in female subjects (P = .015) and showed correlation with prominence of hematopoietic marrow within the proximal humeral metaphysis (P = .01). The most characteristic pattern was a curvilinear distribution of hematopoietic marrow involving the subcortical region of the medial humeral head, though in some patients more centrally located patchy or globular regions of hematopoietic marrow were observed. These findings indicate that when signal intensity variations are observed within the epiphysis on MR images, the possibility of residual or reconverted hematopoietic marrow should be considered.
造血骨髓出现在中轴骨骼和长骨的干骺端区域是众所周知的。然而，一般认为正常成年人的长骨骺内不存在造血骨髓。本研究对96例因肩部磁共振成像检查就诊的患者的骨髓模式进行了评估。99%的患者肱骨近端干骺端存在残余造血骨髓，62%延伸至骨骺。骨骺造血骨髓在女性受试者中更明显（P = 0.015），且与肱骨近端干骺端造血骨髓的明显程度相关（P = 0.01）。最具特征性的模式是造血骨髓呈曲线分布，累及肱骨头内侧的皮质下区域，不过在一些患者中观察到造血骨髓更集中于中央的斑片状或球形区域。这些发现表明，当在磁共振图像上观察到骨骺内信号强度变化时，应考虑残余或再转化造血骨髓的可能性。
