Orbital fine needle aspiration cytology: An effective diagnostic tool for orbital mucormycocysis

Primary orbital mucormycosis is rare and challenging to diagnose. We present a case of a 52-year-old diabetic COVID-19-recovered patient in whom orbital mucormycosis was missed on a preliminary computed tomography (CT) scan. The patient deteriorated with right-sided progressive visual loss and proptosis despite treatment. CT scan was reviewed and a mild collection was found in the right orbit prompting an intraorbital fine needle aspiration cytology (FNAC) that revealed fungal hyphae consistent with mucor. Thus, right eye exenteration was performed as a lifesaving procedure. FNAC is a quick and efficient method for diagnosis of fungal infection and may be applied for confirmation of suspected orbital mucormycosis.