Intestinal submucous fibrovascular hamartoma: A case report.

Intestinal submucosal fibrovascular hamartoma is considered as a rare intestinal lesion. We present the case of a 63-year-old female with abdominal symptoms, bleeding, and increased serum tumor markers. The abdominal ultrasound revealed that the left abdominal intestinal wall and mesentery were thickened with enlarged multiple lymph nodes, suggesting intestinal obstruction. Other imaging findings confirmed the ultrasound findings. Histopathology of the removed lesion provided the diagnosis of intestinal submucosal fibrovascular hamartoma with hemorrhage, inflammation, and amyloidosis. Intestinal submucosal fibrovascular hamartoma is a hemorrhagic lesion with macroscopic tumor due to the abnormal mixing of the organ's normal components, which still remains a challenge for clinicians and pathologists. We consider routine abdominal ultrasonography and contrast-enhanced ultrasonography (SICUS) to be safe and effective in the diagnosis of intestinal neoplastic lesions.