Diffuse Leiomyomatosis Syndrome

**Semantic type:** Disease or Syndrome

**Definition:** A syndrome characterized by multiple, benign nodular smooth muscle neoplasms of the esophagus, tracheobronchial tree and the genitourinary tract. Clinical signs include dysphagia with retrosternal pain, dyspnea and genital hypertrophy. There is a strong association with Alport Syndrome in patients with deletions in the type IV collagen alpha chain genes COL4A5 and COL4A6.