MRI对先天性肛门直肠畸形的诊断价值

Magnetic resonance imaging in the diagnosis of congenital anorectal malformation

目的探讨MR I对先天性肛门直肠畸形手术前后的诊断价值。方法对5例正常对照组,14例先天性肛门直肠畸形病例均行盆腔、骶尾部MR检查。观察肛门内、外括约肌、耻骨直肠肌形态,肛门直肠本身发育缺陷以及骶椎、泌尿生殖系统等畸形。结果本组MR显示耻骨直肠肌、括约肌群发育好13例,发育较好3例,发育差3例,T1W I不抑脂序列为显示肛周肌群较好的序列。7例合并骶尾椎畸形,5例合并泌尿系统畸形。结论MR I对先天性肛门直肠畸形具有重要诊断价值,可从形态上了解盆底肌的发育,并能明确骶骨、椎管、泌尿系统等畸形,在确定手术方式及评价手术疗效方面具有重要意义。

Objective To investigate the magnetic resonance imaging （MRI） in the diagnosis of congenital anorectal malformation. Methods Fourteen patients with congenital anorectal malformation received pelvic and sacrococcygeal MRI scan with 5 normal controls. The morphological changes of puborectalis and anal sphincter, and the abnormalities of anus, rectum, sacral vertebra and genitourinary system were observed. Results The best developed puborectalis and anal sphincter were showed in 13 cases, the better developed in 3 cases, the least developed in 3 cases, respectively. There were 7 cases with abnormalities of sacral vertebra and 5 cases with abnormalities of genitourinary system.Conclusion MRI examination plays an important role in the diagnosis of congenital anorectal malformation. The morphological changes of puborectalis and anal sphincter, and the abnormalities of sacral vertebra and genitourinary system can be determined by the MRI examination, which is important in clinical therapy planning and accessing the curative effect.