CT scans can be used to detect lipomas in the internal auditory canal, as reported by Wang, Tien and Hsu (2001), who used it to diagnose the cause of progressive left side hearing loss in a patient. Characteristic CT findings of lipomas have been documented. Fat is hypointense on CT scanning, and this is reflected by the negative Hounsfield units.
Detecting synchronous tumors, either second primary tumors or metastases at a distance from the original tumor, in patients with head and neck carcinoma drastically affects their prognosis and may change how the patient is managed (Houghton et al, 1998). Performing computerized tomographic scanning (CT) of the chest is an effective screening investigation
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