Description

Thompson and Smoker evaluated patients with hypoglossal palsy and correlated the segment of the hypoglossal nerve that was involved with the most likely causes. This can help the neurologist determine the optimum diagnostic strategy. The authors are from the Medical College of Virginia.


 

Segments of the hypoglossal nerve that can be identified on imaging studies:

(1) medullary

(2) cisternal

(3) skull base

(4) nasopharyngeal or oropharyngeal carotid space

(5) sublingual

Process

Medullary

Cisternal

Skull Base

Carotid Space

Sublingual

tumor

glioma

meningioma

metastasis, glomus tumor, nerve sheath tumor, NP carcinoma

lymph node metastases

carcinoma

vascular

infarction

aneurysm

 

dissection

 

other

hemorrhage, demyelination

rheumatoid arthritis, basilar ectasia

 

 

infection

 

where:

• NP = nasopharyngeal carcinoma

 


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