Zygomatic Bone Osteomyelitis – A Complete Patient Guide

Overview

Zygomatic bone osteomyelitis is a rare, serious infection of the zygomatic (cheek) bone that results in inflammation, bone loss, and potentially necrosis. The condition follows the same pathophysiology as osteomyelitis elsewhere in the skeleton: bacteria (or, less commonly, fungi) invade bone tissue, provoke an immune response, and cause destruction of bone architecture.

Because the zygomatic bone sits just beneath the skin of the cheek and forms part of the orbit, infection can spread to adjacent soft tissues, the orbit, and the maxillary sinuses. Prompt recognition is essential to preserve facial contour, vision, and overall health.

Who It Affects

• Adults 30–70 years old are most frequently reported, but cases occur in children and the elderly.
• Men are slightly more affected than women (≈ 55 % vs. 45 %).
• Patients with underlying immunosuppression (diabetes, HIV, chemotherapy, chronic steroid use) have a markedly higher risk.

Prevalence

Osteomyelitis of the facial bones accounts for < 1 % of all osteomyelitis cases. Specific data on the zygomatic bone are scarce, but case series from tertiary centers report 10–15 % of facial‐bone osteomyelitis involve the zygoma. The overall incidence of osteomyelitis in the United States is about 12 per 100 000 people per year (CDC, 2022), with craniofacial locations representing a tiny fraction of that number.

Symptoms

Symptoms can develop gradually over weeks or present acutely after trauma or surgery. The most common manifestations include:

• Pain – deep, throbbing ache localized to the cheek; worsens with chewing or head movement.
• Swelling – a firm, often tender edema over the malar region; may become fluctuant if an abscess forms.
• Redness (erythema) – skin over the zygoma may turn pink or purplish.
• Fever & chills – systemic signs of infection are present in 40–60 % of patients.
• Drainage – purulent material may discharge through a sinus tract or after incision & drainage.
• Limited mouth opening (trismus) – pain in the muscles of mastication can restrict jaw movement.
• Altered sensation – tingling, numbness, or hypoesthesia in the cheek due to involvement of the infraorbital nerve.
• Vision changes – if the infection spreads to the orbit, patients may experience diplopia, ptosis, or decreased