Pott Puffy Tumor Secondary to Cranial Vault Reconstruction in a Patient With Metopic Craniosynostosis.

Pott puffy tumor (PPT) is defined as a subperiosteal abscess of the anterior wall of the frontal sinus associated with underlying frontal osteomyelitis. PPT affects all age groups but occurs predominantly in adolescents. The potential etiologies include rhinosinusitis, a history of direct trauma to the forehead, odontogenic disease, intranasal drug abuse, diabetes, or other immunocompromised states. We introduce a case of a 6-year-old boy with a medical history of anterior cranial vault remodeling presenting with localized forehead swelling. Computed tomography imaging demonstrated mucosal thickening and a region of dehiscence in the wall of the frontal sinus; the presence of midline subperiosteal abscess was consistent with a diagnosis of PPT. Due to concerns for intracranial involvement, we utilized removal and replacement of the anterior wall of the frontal sinus, complete removal of sinus mucosa, and frontal sinus obliteration with bilateral peri-cranial flaps. To the best of our knowledge, this is the first case description of a PPT secondary to cranial vault reconstruction in a patient with metopic craniosynostosis.