In Gradenigo's syndrome, which symptom is not typically included?

Gradenigo's syndrome is characterized by a specific set of symptoms that arise due to a complication of otitis media involving the petrous part of the temporal bone. The key symptoms associated with this syndrome are earache, otorrhea, and diplopia.

Earache is common due to the inflammation from the infection affecting the middle ear. Otorrhea, or discharge from the ear, results from the similarly affected middle ear. Diplopia, or double vision, occurs due to the involvement of cranial nerves, particularly the abducens nerve, which can become affected due to the proximity to the infections.

Vesicles, typically associated with viral infections such as herpes zoster, are not part of Gradenigo's syndrome. This symptom does not align with the underlying pathophysiology of the syndrome, which focuses more on ear-related infections and their complications rather than viral rashes or lesions. Thus, vesicles are correctly identified as not being a typical component of Gradenigo's syndrome.