Skull base tumor
Common Diseases
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Skull base tumor diagnosis
If you have symptoms that may be a tumor at the base of the skull, your doctor will examine you and ask you about your health and symptoms.
One or more of the following tests may be used to determine the presence of a skull base tumor and whether the tumor has spread.
Imaging examination
Imaging tests allow doctors to determine the presence and location of tumors. Imaging examination of skull base tumors is as follows:
CT or CAT (Computerized Axial Tomography) scan: A CT scan uses an X-ray machine to take several pictures from different angles, providing highly detailed images.
Magnetic resonance imaging, or MRI, uses magnetic fields and radio waves to produce pictures of the soft tissues and organs of the body.
PET (Positron emission Tomography) scan: In a positron emission tomography or PET scan, a small dose of radioactive sugar is injected into the patient. The scanner shows where the body distributes sugar, which creates an image. This image can help radiologists find cancer cells in the body.
Angiography: Angiography produces detailed images of blood flow and blood vessels in the human body
biopsy
During a biopsy, a small tissue sample is taken and examined under a microscope for the presence of cancer cells. Depending on the location of the tumor, some biopsies can be performed on an outpatient basis and require only local anesthesia. Other times, patients must undergo a surgical biopsy under general anesthesia. The following biopsies can be used for skull base tumors:
Fine needle aspiration: A fine needle is used to remove suspected cancer cells
Endoscopic biopsy: A long, thin tube with a camera and another tool at the end is inserted through the nose and sinuses. Doctors then find the tumor and remove a piece for examination.
Use a microscope from the ear
Surgical biopsy
Functional testing
Functional tests show how certain parts of the brain, head and neck work. These tests are selected based on your symptoms and the location of the tumor at the base of the skull. They may include:
Hearing test: Audiogram, auditory Brainstem response (ABR)
Balance test (video ophthalmography, rotating chair test)
Visual examination
Stroboscopic examination of vocal cord function
Swallowing tests, including modified barium swallowing
Neurocognitive assessments measure memory and cognitive changes
Hormone detection
Odor test
