Fernbach S K, Feinstein K A
Department of Radiology, Northwestern University Medical School, Chicago, IL.
AJR Am J Roentgenol. 1991 Jun;156(6):1215-7. doi: 10.2214/ajr.156.6.2028870.
Towne-view skull radiographs of 38 infants with unilateral lambdoid synostosis were reviewed. The diagnosis of lambdoid synostosis was based on other plain film findings, CT findings, or clinical examination. All patients had deformity of the ipsilateral petrous bone, presumably because of pressure caused by redirected brain growth. Specific changes included flattening of the petrous ridge and depression of the roof of the mastoid portion of the petrous bone and adjacent structures such as the semicircular canals. Flattening of the petrous ridge and depression of the roof of the mastoid portion of the petrous bone are useful signs of lambdoid synostosis when sutural closure has produced sutural indistinctness rather than sclerosis.
回顾了38例单侧人字缝早闭婴儿的Towne位颅骨X线片。人字缝早闭的诊断基于其他平片表现、CT表现或临床检查。所有患者同侧岩骨均有畸形，推测是由于脑生长方向改变所致压力引起。具体改变包括岩骨嵴变平以及岩骨乳突部顶部和相邻结构如半规管凹陷。当缝合线闭合导致缝合线模糊而非硬化时，岩骨嵴变平和岩骨乳突部顶部凹陷是人字缝早闭的有用征象。
