MRI diagnosis of megarectum in pregnant women

Description

A 33-year-old pregnant woman presented at 9 weeks' gestation for a voluntary abortion after an unwanted pregnancy. She had a history of long-standing abdominal distension and childhood constipation, and also a non-complicated pregnancy with normal vaginal delivery few years ago. The clinical examination revealed a distended abdomen. Ultrasound showed a great non-characterisable pelvic abdominal mass repressing pelvic organs, pushing forward and to the right the bladder and to the left the uterus. It also shows an early viable intrauterine pregnancy and no other intra-abdominal abnormalities (figure 1). MRI with multiplanary acquisitions shows that the pelvic mass seen on ultrasound examination has been a large rectum containing a giant fecaloma revealing a megarectum (figure 2). Therapeutic discontinuation of pregnancy was realised then the patient was operated. She had a mucosal proctectomy associated to a sigmoidectomy with colorectal anastomosis.1 The operative sequences were simple. This entity...

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