Wong Alex M, Toh Cheng-Hong, Lien Reyin, Chao An-Shine, Wong Ho-Fai, Ng Koon-Kwan
Department of Medical Imaging and Intervention, Chang Gung Memorial Hospital, Chang Gung University, Kwei-Shan, Tao-Yuan, Taiwan, Republic of China.
Pediatr Radiol. 2006 Nov;36(11):1208-11. doi: 10.1007/s00247-006-0294-z. Epub 2006 Sep 19.
Meconium pseudocyst results from a loculated inflammation occurring in response to spillage of meconium into the peritoneal cavity after a bowel perforation. Certain cystic lesions, such as abscesses and dermoid and epidermoid cysts, are known to show reduced water diffusion on DWI. MRI has recently become a valuable adjunct to ultrasonography for fetal gastrointestinal anomalies. Complementary to ultrasonography, prenatal MRI can help further characterize the lesion and can clearly demonstrate the anatomical relationship between the lesion and adjacent organs. We report a case of meconium pseudocyst that was prenatally imaged with ultrasonography and MRI, postnatally complicated by pneumoperitoneum, and proved by postnatal surgery and histopathology. We emphasize the MRI of the pseudocyst, particularly T1-weighted and diffusion-weighted imaging.
胎粪假性囊肿是由于肠穿孔后胎粪溢入腹腔引发的局限性炎症所致。某些囊性病变，如脓肿、皮样囊肿和表皮样囊肿，已知在扩散加权成像（DWI）上表现为水扩散受限。磁共振成像（MRI）最近已成为超声检查胎儿胃肠道异常的重要辅助手段。作为超声检查的补充，产前MRI有助于进一步明确病变特征，并能清晰显示病变与相邻器官之间的解剖关系。我们报告一例胎粪假性囊肿病例，产前通过超声和MRI成像，产后并发气腹，并经产后手术及组织病理学证实。我们重点介绍了假性囊肿的MRI表现，尤其是T1加权成像和扩散加权成像。
