Skull Base Squamous Cell Carcinoma Presenting as Collet-Sicard Syndrome: A Rare Cause of Multicranial Nerve Dysfunction.

The lower cranial nerves (CNs) - IX, X, XI, and XII - are affected by lesions of the skull base that impact the hypoglossal canal and jugular foramen in Collet-Sicard Syndrome (CSS), a rare disorder. Loss of posterior tongue taste sensation (IX nerve), paralysis of the vocal cords and difficulty swallowing (resulting from the X nerve), weakness in the sternocleidomastoid and trapezius muscles (due to the XI nerve), and atrophy and weakness of the tongue muscles (caused by the XII nerve) are all signs of this condition. The purpose of this report is to describe a case of squamous cell carcinoma (SCC), presenting features of multiple CN palsies.