Abstract
INTRODUCTION AND IMPORTANCE: Mesenteric cysts are rare abdominal lesions that can present with varying clinical manifestations. Early diagnosis and management are crucial to prevent complications, especially in pediatric populations. CASE PRESENTATION: A 10-year-old female patient presented to our facility with a palpable abdominal mass localized in the periumbilical region. Her medical history was unremarkable, with no previous illnesses or surgical interventions. Imaging studies, including abdominal ultrasound, revealed a complex cystic structure behind the umbilicus, interconnecting multiple compartments, and extending adjacent to the bladder and both renal poles. A computed tomography scan confirmed the presence of mesenteric cysts measuring up to 75 mm, devoid of malignant features. CLINICAL DISCUSSION: Exploratory laparotomy was performed, resulting in the complete resection of the mesenteric cysts. The pathological examination indicated a cystic configuration characterized by thick-walled vascular spaces lined by collagen fibers. This case underscores the importance of thorough evaluation and timely intervention when dealing with mesenteric cysts, particularly given the potential for complications such as infection or rupture. CONCLUSION: This case contributes to the existing literature on mesenteric cysts in children, emphasizing the need for meticulous imaging and appropriate surgical management. Continued research is warranted to establish standardized protocols for diagnosis and treatment.