Hirschsprung's disease: its aetiology, pathogenesis and differential diagnosis.

Anal Canal/abnormalities Biopsy Chagas Disease/diagnosis Colitis, Ulcerative/diagnosis Colon/abnormalities,anatomy & histology,innervation Colonic Diseases/diagnosis Congenital Abnormalities/diagnosis Diagnosis, Differential Environment Fissure in Ano/diagnosis Gastrointestinal Motility Humans Intestinal Obstruction/congenital Intestine, Large/blood supply Ischemia Megacolon/diagnosis,etiology,pathology Muscles/anatomy & histology Myenteric Plexus/abnormalities Parasympathetic Nervous System/anatomy & histology,embryology Rectum/abnormalities Spasm/diagnosis Spinal Dysraphism/diagnosis Sympathetic Nervous System/anatomy & histology Syndrome