Zygomycosis of the Oral Cavity in a Main Referral Centre in Malaysia: A Case Series (1967-2021)

Abstract

Zygomycosis is a rare opportunistic fungal infection caused by fungi in the phylum Mucoromycota, subphylum Mucoromycotina and order Mucorales. Immunocompromised patients may harbour the disease by inhalation of the spores from the environment into the paranasal sinuses. Rhino-orbital-cerebral is the most common form which extends into the oral cavity, especially to the palate. We present twelve cases of zygomycosis diagnosed in the Stomatology Unit, Institute for Medical Research (IMR), Malaysia. Most of the patients are immunocompromised and presented as the rhino-orbital-cerebral form. Routine haematoxylin and eosin (H&E) staining were used for all cases while selected cases required additional special staining. The characteristic histological features of broad, non-septate, branched, amphophilic fungal hyphae are seen. We aim to report this rare occurrence to contribute to the literature and raise awareness about this condition among clinicians. To date, this is the first compilation of oral zygomycosis cases known to be reported in Malaysia.