Jung Eun-Jung, Lee Young-Joon, Park Soon-Tae, Ha Woo-Song, Choi Sang-Kyung, Hong Soon-Chan, Jeong Chi-Young, Joo Young-Tae, Na Jae-Bum, Ko Gyung-Hyuck
Department of Surgery, College of Medicine, Gyeongsang National University Hospital, 90 Chilarm-dong, Jinju, Gyeongsangnam-do, South Korea.
Surg Today. 2006;36(7):619-22. doi: 10.1007/s00595-006-3208-7.
We herein report a rare case of myositis ossificans originating from the abdominal rectus muscle, found in a 38-year-old woman who presented with a left upper abdominal mass. The mass was initially suspected to be a malignant neoplasm because no history of either operation or trauma existed for this patient. Moreover, the location of the mass was unusual and the enhancement patterns of the dynamic magnetic resonance images were similar to that of a malignant tumor. Based on the radiologic findings, a surgical exploration was performed. A well-circumscribed mass, which measured 3.2 x 2 cm, was found in the rectus muscle. Microscopic findings showed a typical zonal pattern with a fibroblastic central zone and a zone of ossification at the periphery. Although abdominal myositis ossificans is extremely rare, it is one of the causes of abdominal mass lesions and can be mistaken for a malignant tumor. Therefore, a thorough knowledge of the evolution of myositis ossificans is necessary and in cases with malignant suggestion on magnetic resonance imaging, like that seen in our case, we suggest that a surgical excision may be necessary for both the diagnosis and treatment.
我们在此报告一例罕见的起源于腹直肌的骨化性肌炎病例，患者为一名38岁女性，表现为左上腹肿块。由于该患者既无手术史也无外伤史，肿块最初被怀疑为恶性肿瘤。此外，肿块的位置不寻常，动态磁共振成像的强化模式与恶性肿瘤相似。基于影像学检查结果，进行了手术探查。在腹直肌中发现一个边界清晰的肿块，大小为3.2×2厘米。显微镜检查结果显示出典型的带状模式，中央为成纤维细胞区，周边为骨化区。尽管腹部骨化性肌炎极为罕见，但它是腹部肿块病变的原因之一，可能被误诊为恶性肿瘤。因此，有必要全面了解骨化性肌炎的演变过程，对于磁共振成像有恶性征象的病例，如我们报道的本病例，我们建议手术切除对于诊断和治疗可能都是必要的。
