title: Isolated sphenoid sinus lesion: A diagnostic dilemma.
abstract: Isolated sphenoid sinus lesions are an uncommon entity and present with non-specific symptoms. In this case report, the patient presented with a history of headaches for a duration of one month without sinonasal symptoms. A computed tomography scan showed a soft tissue mass occupying the sphenoid sinus. An endoscopic biopsy revealed fungal infection. Endoscopic wide sphenoidotomy with excision of the sphenoid sinus lesion was then performed however, the microbiological examination post-surgery did not show any fungal elements. Instead, Citrobacter species was implicated to be the cause of infection.
authors.affiliation: Department of Otorhinolaryngology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia.
authors.forename: Sarmad
authors.initials: S
authors.lastname: Alazzawi
authors.affiliation: Department of Otorhinolaryngology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia.
authors.forename: Tengku
authors.initials: T
authors.lastname: Shahrizal
authors.affiliation: Department of Otorhinolaryngology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia.
authors.forename: Narayanan
authors.initials: N
authors.lastname: Prepageran
authors.affiliation: Department of Pathology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia.
authors.forename: Jayalakshmi
authors.initials: J
authors.lastname: Pailoor
keywords: Citrobacter; sinuses; sphenoid lesion; sphenoid sinusitis