Refractory Pseudomonas Osteomyelitis of the Skull Base With Gradenigos Syndrome: Early Dysphagia and Late Abducens Nerve Palsy

Fulvio Mammarella, Antonella Loperfido, Gianluca Velletrani, Francesco Casorati, Alessandro Stasolla, Stefano Di Girolamo, Gianluca Bellocchi

Abstract


Gradenigos syndrome (GS) is a rare entity characterized by otitis media, pain in the trigeminal nerve distribution and abducens nerve palsy. The classic triad is uncommon, making the diagnostic workup challenging. Specifically, the diagnostic approach includes medical history, a complete otorhinolaryngological examination, a pure-tone audiogram and radiological investigation such as contrast-enhanced computed tomography scan and magnetic resonance imaging of head and neck. Broad-spectrum antibiotics are the first-line treatment, such as intravenous (IV) ceftriaxone and IV metronidazole. Here, we present the case of a 71-year-old man with a previous history of otitis media and poorly controlled type 2 diabetes mellitus. He presented to our attention with facial pain, left hemilarynx paralysis, dysphagia and otorrhea. The patient was treated with broad-spectrum antibiotics without any clinical improvement. Imaging evaluations demonstrated the presence of wide and poorly defined pathological material with epicenter in the masticatory space, involving all nearby structures. The patient underwent multiple biopsies without obtaining a definitive tissue diagnosis of neoplasia. After 2 months, the patient developed delayed VI cranial nerve palsy, providing evidence of GS. Although incomplete, GS has been described in the literature; however, none of the cases exhibited a latent abducent deficit. To the best of our knowledge, this is the only case with a delayed onset of abducens nerve palsy.




J Med Cases. 2024;15(2-3):43-48
doi: https://doi.org/10.14740/jmc4191

Keywords


Gradenigo's syndrome; Abducens nerve palsy; Otitis media; Skull base osteomyelitis

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