title: Posterior widening of the S1-S2 interspace in children: a normal variant of sacral development.
abstract: A lucency in the posterior S1-S2 area of the sacrum was seen in two pediatric patients. Bone scans in both and a myelogram in one case were normal. Follow-up has failed to show any clinical evidence of pathology. The lucencies are felt to represent normal variations in the development of the sacrum. A series of radiographs at different ages is presented to illustrate how normal developmental progresses in this area.
mesh_terms: D000293:Adolescent; D002648:Child; D006801:Humans; D008297:Male; D010012:Osteogenesis; D011859:Radiography; D012447:Sacrum / Q000000981:diagnostic imaging* / Q000254:growth & development