title: Normal roentgen variant: cortical tunneling of the distal ulna.
abstract: Marked tunneling of the distal ulnae was discovered in a 7-year-old boy who had injured his wrist at play. No pathological process could be found and the boy remains asymptomatic. Similar examples from the literature are discussed.
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D008297:Male; D010522:Periostitis / Q000209:etiology; D011859:Radiography; D014457:Ulna / Q000000981:diagnostic imaging / Q000293:injuries*; D014954:Wrist Injuries / Q000000981:diagnostic imaging*