partial agenesis of inferior rectus muscle: a case report

purpose: to report a case of partial agenesis of the inferior rectus muscle in a child who was presented because of ocular misalignment and a deficient depression of the right eye. patient and findings: the patient was a 4-year-old girl. preoperative ct scans confirmed the clinical diagnosis of inferior rectus agenesis. the patient underwent augmented transposition of horizontal recti muscles with good post-operative results. conclusion: congenital absence of the inferior rectus muscle is a possible cause of inferior rectus muscle palsy. although rare, agenesis deserves attention in the absence of another identifiable causes for inferior rectus palsy. muscle transposition procedures in conjunction with intramuscular botulinium toxin injection or other weakening procedures of the superior rectus muscle have had appreciable functional and cosmetic results in these patients.