Kuftinec M M, Parson C E, Delivanis H P, Sothern R B
Chronobiologia. 1984 Oct-Dec;11(4):383-9.
We have studied nasopharyngeal adenoids on standardized cephalometric radiograms of 25 children in each season. While individual subjects showed changes ranging from 1-17% throughout the year, a synchronized circannual rhythm could be described for the girls only. Similar changes were observed in boys, although a synchronized group rhythm could not be ascertained. No clear explanation for this apparent sexual dimorphism is known at this time, but different hormonal influences are likely. Evaluation of the nasopharyngeal airway (NPA) patency is thus affected by the season in which a cephalogram is taken. It should be noted that due to the described circannual rhythmicity, a single determination of the adenoid masses may be an insufficient and misleading indicator of the NPA obstruction. Etiology and clinical significance of these rhythmic changes need to be explored further.
我们在每个季节对25名儿童的标准化头颅侧位X线片上的鼻咽腺样体进行了研究。虽然个体受试者在全年中显示出1%至17%的变化，但仅在女孩中可以描述出同步的年周期节律。在男孩中观察到了类似的变化，尽管无法确定同步的群体节律。目前尚不清楚这种明显的性别差异的明确解释，但可能存在不同的激素影响。因此，头颅侧位片拍摄季节会影响对鼻咽气道（NPA）通畅性的评估。应当注意的是，由于所述的年周期节律性，单次测定腺样体大小可能是NPA阻塞的不充分且具有误导性的指标。这些节律变化的病因和临床意义需要进一步探讨。
