We conducted a retrospective and prospective study. In our study, we collected 35 cases of MAR, including 21 boys and 14 girls, over a period of 4 years, from January 2017 to December 2020. We recorded an average of 8.7 cases of ADR per year. They are more frequent in boys, with a sex ratio of 1.5. The majority of our patients came from the Mopti region and were of Dogon ethnicity. Most of the malformations were discovered by the parents, given that 54.3% of the mothers had given birth in a health centre and the malformed children were most often seen in a state of intestinal obstruction or sub-occlusion requiring an emergency colostomy. The diagnosis was made during the systematic examination of the newborn in the delivery room in 8.57% of our patients. Low forms were more frequent (48.6%). Invertograms were performed in 15 patients (42.9%). Abnormalities associated with MAR were dominated by spinal malformations in 4 cases (11.4%). In terms of treatment, the operative techniques used, in order of frequency, were: ASARP 8 cases (30.8%); Pena PSARP 15 cases (57.7%), YV Proctoplasty 2 cases (7.7%) and PENA PSARP plus MOLLARD AP 1 case (3.8%). Average follow-up was 12 months. Four (4) patients (15.4%) were lost to follow-up. Post-operative follow-up was favourable in 17 patients (65.4%); 4 cases of death and 1 case of anal stenosis.