Introduction: Constipation is a gastrointestinal disorder that causes less frequent bowel movements, difficult stools, pain, and stiffness. Acute constipation can cause intestinal obstruction and may even require surgery. The pathogenesis is multifactorial and focuses on genetic predisposition, socioeconomic status, low fiber consumption, lack of sufficient fluid intake, lack of mobility, changes in hormonal balance, side effects of medications or body anatomy. Chronic constipation is a complex condition in older people characterized by difficulty defecating. In this sense, this situation is closely related to the patient's quality of life and the consumption of health resources. Clinical Case: male patient who reports chronic constipation for a year, presents for 24 hours a clinical condition characterized by vomiting of food content on 4 occasions, reports abdominal distension accompanied by flatulence and dyspepsia, during hospitalization an episode of hematochezia versus rectal bleeding is evident. Evolution: Chronic Constipation is diagnosed and Resection Technique of the extravertebral portion of the filum terminalis plus posterior internal sphincterectomy is used. Conclusions: The Resection Technique of the extravertebral portion of the filum terminalis plus posterior internal sphincterectomy has demonstrated excellent benefits in the management of pediatric patients with chronic constipation.