Leiomyoblastoma causing acute gastric outlet obstruction in an infant

A 1-year-old boy had acute gastric outlet obstruction, the cause of which was a prepyloric submucosal mass. The mass and the ulcerated overlying mucosa were excised. The histological diagnosis was leiomyoblastoma with parenchymatous hemorrhage. Apparently, he is the youngest patient reported to have this disease.