Life-threatening hematochezia from a rectal venous malformation successfully treated with microfoam sclerotherapy: description of a new technique

Large Anorectal Venous Malformation Treated With Microfoam Therapy

Deficiency of smooth muscle cells can lead to dysfunction and engorgement of blood vessels termed as hemangioma, arteriovenous malformations, and venous malformations (VMs). Anorectal VM is a rare disease. It can present with massive hematochezia. An optimal treatment of anorectal VMs has not been defined. Surgery is an option if the lesion can be resected completely. Endoscopic injection sclerotherapy has been reported to be effective in treating small colorectal VMs. However, it has rarely been described in the treatment of large VMs. In this study, we describe a rare case of large anorectal VMs treated with microfoam sclerotherapy.

Clinical Characteristics and Management of Colorectal Vascular Malformation in Children: A Retrospective Study of 23 Cases

INTRODUCTION

 The objective of this study is to summarize the clinical characteristics and management of rare diseases of colorectal vascular malformation (CRVM) in children.

METHODS

 We retrospectively analyzed the clinical data of CRVM patients admitted to the Children's Hospital of Fudan University from 2004 to 2019.

RESULTS

 A total of 23 cases (16 males, 7 females) were enrolled. The median age of symptom onset was 1.4 years. Hematochezia and anemia were cardinal symptoms. Fourteen patients (60.9%) were misdiagnosed as anal fissures (n = 4), internal hemorrhoids (n = 3), rectal polyps (n = 2), inflammatory bowel disease (n = 2), portal hypertension (n = 2), and Meckel's diverticulum (n = 1), respectively. The average time from symptom onset to diagnosis was 4.5 ± 4.4 years. Other vascular malformations were detected in eight patients (34.8%). All patients showed a positive anomalous vascular image on contrast-enhanced computed tomography (CT) or magnetic resonance imaging (MRI). The sensitivity of colonoscopy in the diagnosis of CRVM was 82.6% (19/23). A total of 21 patients underwent a modified Soave procedure. The lesions were mostly restricted to the colorectum and showed transmural diffuse distribution, with an average length of 20 ± 5.4 cm. Two patients (9.5%) experienced surgical complications. Bloody stools reappeared in two patients (9.5%), and colonoscopy showed abnormal angiogenesis at the anastomotic site, which were cured by sclerotherapy and/or electrocautery. The median follow-up time was 78 months. Bloody stools were absent at the last time of follow-up, and hemoglobin was in the normal range for all patients.

CONCLUSION

 The identification of CRVM in children often is delayed. Colonoscopy, CT, and MRI are essential in making the correct diagnosis. The modified Soave procedure is safe and feasible to treat CRVM in children. Endoscopic sclerotherapy and/or electrocautery can be used for residual lesions.