Medicolegal autopsies show a great incidence of sphenoiditides (63.3%) with a prevalent chronic atrophy (48%). Frontal and asymmetric presentation of the posterior cribrate cells about the sphenoid sinuses proved an unfavorable regional anatomic factor underlying dysfunction of the shunt drainage. Sphenoiditides are also promoted by digestions of the Vidian nerve canal producing harbours at the base of the sphenoid pterygoid process. Identification of anatomical factors of risk and characterization of the mucosal defects can be conducted at additional x-ray examination.
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