Anorectal malformations with good prognosis: variables affecting the functional outcome

Area of Science:

• Pediatric Surgery
• Colorectal Surgery
• Developmental Biology

Background:

• Anorectal malformations (ARMs) represent a spectrum of congenital conditions affecting the distal rectum and anus.
• While some ARMs are considered to have a good prognosis, underlying factors can influence patient outcomes.
• Identifying these factors is crucial for optimizing surgical and long-term management.

Purpose of the Study:

• To investigate the clinical and manometric outcomes of patients surgically treated for anorectal malformations with a presumed good prognosis.
• To identify specific factors associated with suboptimal outcomes in this patient cohort.

Main Methods:

• A cohort of 30 patients operated for ARM underwent clinical evaluation using the Rintala score.
• Anorectal manometry was performed to assess anal resting pressure (ARP), rectoanal inhibitory reflex (RAIR), and rectal volume (RV).
• Data were analyzed concerning sex, ARM type, surgical timing (posterior sagittal anorectoplasty - PSARP), neurospinal cord dysraphism (ND), neonatal colostomy, and surgical institution.

Main Results:

• Neurospinal cord dysraphism (ND) was identified in 20% of patients, even with a normal sacrum.
• ND and neonatal colostomy were significantly associated with poorer clinical (Rintala score) and manometric outcomes.
• Patients with ND or neonatal colostomy exhibited significantly lower anal resting pressure (ARP) and reduced rectoanal inhibitory reflex (RAIR) compared to controls.

Conclusions:

• Neurospinal cord dysraphism can be present in ARM patients without obvious sacral abnormalities.
• Patients with good prognosis ARMs may not achieve outcomes comparable to healthy children, especially when ND or neonatal colostomy is involved.
• Neurospinal cord dysraphism and neonatal colostomy are significant factors that appear to negatively impact both clinical and manometric outcomes in ARM patients.