LAUSR

BACKGROUND Mesenteric lymphangioma (ML) in adults is a very rare disease. We report six hospitalized adult patients with ML in our hospital between January 2013 and July 2018 to investigate the characteristics and prognosis of ML in adults. CASE SUMMARY The male-to-female ratio was 3:3, and the median age at diagnosis was 55.2 years. Clinical manifestations varied; however, most were acute cases (5/6). No history of trauma was reported. None (0/6) of the patients were accurately diagnosed with ML in the emergency and outpatient departments. Mesenteric cysts were identified in four patients (66.7%) by abdominal ultrasound and in five patients (83.3%) by computed tomography. ML was postoperatively confirmed by pathology. Most MLs (4/6) were associated with infection of other systems. ML was located in the mesentery of the small intestine (n = 4), ileum (n = 1) and rectum (n = 1). Cyst fluid was clear (n = 4), chylous (n = 1) and bloody (n = 1). Surgical procedures included complete tumor removal and partial intestinal excision (n = 6). Recurrence and adhesive intestinal obstruction were not observed during the 3-12 mo follow-up period. CONCLUSION ML in adults is a rare benign acquired disease that can be cured by surgical treatment. Infection may be a cause of ML.