Treatment consists of surgical drainage of the abscess and the frontal sinus and 6 weeks of intravenous antibiotic therapy directed at the isolated organisms. Trephination is carried out in the floor of the sinus. A drain placed through the trephine allows the drainage of sinus contents and can be used to irrigate with antibiotic solutions.
Sagittal and axial MRI cuts show fluid in the frontal sinus communicating with the subperiosteal abscess through a defect in the anterior table of the sinus
Trephination of the frontal sinus.
Axial CT scan showing a defect in the anterior table of the frontal sinus