<prompt> The most common site of osteoma isMaxillary sinusEthmoidal sinusFrontal sinusSphenoidal sinus  <response>: The commonest site of osteoma in the PNS is frontal sinus.Commonest benign tumor of PNS is an osteomaMost common benign tumor of the nose is capillary hemangioma nasal septumGardners syndrome- Colonic polyposis, multiple soft tissue swellings, and facial osteomasAutosomal Dominant hereditary defect of connective tissueRef: Hazarika; 3rd ed; Pg 370 