Non-familial visceral myopathy: clinical and pathologic features of degenerative leiomyopathy.

Degenerative leiomyopathy (DL) is a distinctive form of acquired degenerative visceral myopathy of uncertain etiology that occurs largely in Africa and results in intestinal pseudo-obstruction (IP). In this review of 39 patients from the Western Cape region of South Africa, the mean age at presentation was 9.5 years (range 6 months to 16 years). Characteristic clinical features included a chronic, insidious history of repeated attacks of abdominal distension, abdominal pain, and vomiting. Marked gaseous distension with atony and IP, especially of the colon, was noted on X-ray films. Megacolon was the most common radiologic feature, but pseudo-obstruction extended proximally into the small intestine in some patients with advanced disease. In the majority of cases the condition was progressive and eventually affected the entire gastrointestinal (GI) tract.