The rare presentation of a frontal mucocele complicated by a Pott's puffy tumor and an epidural-cutaneous fistula: illustrative case.

Background: Frontal mucoceles develop due to accumulation of mucoid secretions within the frontal sinuses. They can lead to serious consequences with further expansion and destruction of the surrounding bones or infection that might spread intracranially.

Observations: The authors present a case of a 37-year-old male with a frontal mucocele and the rare presentation of Pott's puffy tumor and an epidural-cutaneous fistula, as well as a literature review of previously reported cases of epidural cutaneous fistula and sinocutaneous fistula, their predisposing factors, and their management.

Lessons: A mucocele is a benign entity that can rarely present with potentially significant complications. Open surgery is required in patients who have frontal sinus posterior wall involvement, osteomyelitis, or intracranial involvement.