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A 13-year-old boy presented to his general practitioner, with right otalgia, mastoid tenderness and paresis of the right lateral rectus muscle. An MRI showed middle ear cleft opacification only and the patient was treated with oral ciprofloxacin, with resolution of symptoms.
Five months later, he developed a severe occipital headache and had difficulty flexing his neck, accompanied by fever and raised inflammatory markers. There were no signs of acute mastoiditis.
CT showing grossly abnormal appearances of the base of the skull, with areas of widespread erosive change particularly within the clivus (figure 1). There was minimal opacification of the right mastoid (figure 2). Inflammatory change was seen in the longus colli muscle. Trans-sphenoidal clivus biopsies showed granulation tissue only. Tests for tuberculosis and HIV, and a lumbar puncture, were negative. Organisms were seen neither on cytology nor on culture. The symptoms resolved completely after 14 days of intravenous ceftriaxone and metronidazole. The patient was discharged with 2 weeks of oral coamoxiclav. MRI 1 month after treatment showed regression of inflammatory changes, where clivus marrow signal was still affected but the prevertebral soft tissue changes had regressed.
Gradenigo's syndrome (GS)1 is mastoiditis that extends to the petrous apex causing dysfunction of the VI cranial nerve. Infective clivus erosions have been reported as a result of allergic fungal rhinosinusitis,2 but there are no reported cases of clivus erosions occurring in association with GS. This case is also unique because of the long interval between the initial presentation of GS and the indolent progression leading to extensive radiological changes seen at representation 5 months later.
Mastoid tenderness associated with a VI nerve palsy could be a presentation of Gradenigo's syndrome—petrous apicitis—as a result of spreading osteomyelitis.
Taking a thorough medical history of related specialties can be key in uncovering the underlying pathology behind rare presentations.
A presumed osteomyelitis of the clivus bone secondary to Gradenigo's syndrome responds to antibiotics both clinically and radiologically.
The authors thank the patient and his parents for consenting to the writing of this report.
Competing interests None declared.
Patient consent Obtained.
Provenance and peer review Not commissioned; externally peer reviewed.
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