Sunday, September 27, 2009

Labyrinthitis


Labyrinthitis is an inflammation and irritation of the inner ear. Symptoms include dizziness, loss of balance, tinnitus, nausea, vomiting, hearning loss, and trouble focusing the eyes. The cause of labyrinthitis can be from upper respiratory infections, colds, flu, ear infections or other viral or bacterial infections. Allergies, trauma, and brain tumors can also cause inflammation of the inner ear. Over use of some medications or alcohol can be yet another cause. Diagnosis of labyrinthitis can be made with a physical and neurological examination. If further testing is done it is normally to rule out any other cause of the symptoms. These test may include CT, MRI, EEG, and hearing tests. Treatment of symptoms may be necessary during the few weeks until the inflammation decreases and symptoms subside. Treatments can include antibiotics and other medications depending on the patient's symptoms. Therapeautic movement of the head may also help decrease symptoms by moving the small stones within the labyrinth that cause dizziness back to the location they need to be. Both my parents as well as my grandma have all experienced labyrinthitis within the past year. Each had to have a different type of treatment, and after a few weeks the symptoms did subside. I have included an image of a T1 weighted MRI with and without contrast.

Sunday, September 20, 2009

Arachnoid Cyst



Arachnoid cysts are cerebrospinal fluid filled cysts located within the brain and/or spinal canal. Within the brain they are commonly found in the middle cranial fossa and rarely are found intracranially. They are more common in men, and normally appear on the left side of the brain. These cysts are typically asymptomatic. When symptoms do occur they can be headaches or seizures. Often arachnoid cysts are found accidentally with imaging. The best imaging to diagnosis arachnoid cysts is MRI; this is because special sequences such as FLAIR and diffusion weighted images can differienciate between arachnoid cysts and other types of cysts. Included are two T2 weighted MRI images of brains with arachnoid cysts.