Adrenal myelolipoma is a rare, benign, non-functioning mass that occurs in the adrenal gland. It is composed of an admixture of hematopoietic elements and mature adipose tissue, similar to bone marrow. Even at large sizes, adrenal myelolipomas are usually asymptomatic and often incidentally found by ultrasonography or computed tomography (CT) scan. This paper describes an unusual case of adrenal myelolipoma presenting as flank pain.

中文翻译：

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肾上腺骨髓脂肪瘤自发性破裂引起急性腰痛：病例报告。

肾上腺骨髓脂肪瘤是一种罕见的、良性的、无功能的肿块，发生在肾上腺中。它由造血成分和成熟脂肪组织的混合物组成，类似于骨髓。即使是大尺寸，肾上腺髓质脂肪瘤通常也没有症状，并且经常通过超声检查或计算机断层扫描 (CT) 扫描偶然发现。本文描述了一个不寻常的肾上腺骨髓脂肪瘤病例，表现为腰痛。