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Developmental Changes in the Antrum of a Child with Chronic Maxillary Atelectasis

INTRODUCTION Chronic maxillary atelectasis (CMA) is characterized by a persistent decrease in maxillary sinus volume due to inward bowing of one or more antral walls. It is an uncommon condition thought to develop when the medial infundibular wall (MIW) causes valvular occlusion of the natural ostium. We recently reported on the first confirmed case of pédiatrie CMA and were able to demonstrate that the same rhinoscopic and radiographie features found in adults were also diagnostic of CMA in a child. We documented the presence of negative antral pressure and, as in adult CMA, found evidence of valvular occlusion of the natural ostium by a laterally malpositioned and flimsy MIW.