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Hemiageusia from an ipsilateral multiple sclerosis plaque at the midpontine tegmentum
  1. ONOFRE COMBARROS,
  2. PASCUAL SÁNCHEZ-JUAN,
  3. JOSÉ BERCIANO
  1. Service of Neurology, University Hospital “Marqués de Valdecilla”, 39008 Santander, Spain
  2. Service of Clinical Neurophysiology
  1. Dr Onofre Combarros neuro{at}humv.es
  1. CARMEN DE PABLOS
  1. Service of Neurology, University Hospital “Marqués de Valdecilla”, 39008 Santander, Spain
  2. Service of Clinical Neurophysiology
  1. Dr Onofre Combarros neuro{at}humv.es

https://doi.org/10.1136/jnnp.68.6.796

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    The exact location of the pontine gustatory pathway has not yet been clarified, probably because there are so few studies of taste in patients with well localised brainstem lesions.1-3 Here we report on a patient with isolated hemiageusia and trigeminal sensory neuropathy from a single small pontine lesion.

    A 46 year old woman experienced a burning sensation on the left side of the tongue. The next day she discovered a loss of taste on the entire left half of her tongue and numbness on the left side of her face. Neurological examination was normal except for hypaesthesia to pain, touch, and temperature sensation in all three divisions of the left trigeminal nerve, with decreased left corneal reflex and no weakness of masseters. Taste sensation was tested using separate solutions of 1.2 …

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