Tuesday, January 29, 2008

Labyrinthitis


http://www.emedicine.com/ent/topic409.htm This is an image that depicts Labyrinthitis ossificans in the right cochlea. The superior image is prior to giving contrast. The inferior image is post contrast. The inferior image shows enhancement of the right cochlea showing inflammation.
Labyrinthitis is inflammation of the inner ear. The inner is ear is made up of 3 semicircular canals that help control balance. When the inner ear becomes inflamed it can cause vertigo, nausea, vomiting, ear loss (usually temporary), and/or roaring sounds in the ear. The vertigo begins suddenly often one to two weeks after the flu, cold, viral, or bacterial infection. The cause for this inflammation is not clear. It is often triggered by an upper respiratory infection, middle ear infection, or rarely, by bacterial infection. Labyrinthitis is usually diagnosed with medical history and physical examination. If the cause for vertigo is unclear the doctor may request additional tests such as a CT or MRI exam. The inflammation usually goes away on its own in several weeks. If its cause is bacterial you will need antibiotics to cure it.

Sunday, January 20, 2008

Glioblastoma Multiforme


This image is of a glioblastoma multiforme in a fifteen year old boy's brain. These tumors are grade four astrocytomas. They are the most common and most aggressive type of primary brain tumors. They make up 52% of all brain tumors. These types of tumors have a survival rate of about five years. This is a very low survival rate, and usually only occurs in patients that receive treatment. This treatment can consist of surgery, radiation treatments, steroids, or chemotherapy. After seeing the tumor on a CT or MRI scan the tumor can be diagnosed by either stereotactic biopsy or craniotomy. If diagnosed during craniotomy a partial resection of the tumor can also be done then. These tumors can cause seizures, nausea, vomiting, headaches, hemiparesis, or progressive memory, personality, or neurological deficits.(Editors Encyclopedia Wikipedia Online, last modified Jan. 2008) I have seen glioblastomas on MRI of the brains several times in my work and clinical environment. From my experience it is the most common brain tumor I have seen.
Editors Encyclopedia Wikipedia Online. (modified Jan. 2008) Glioblastoma Multiforme.Wikimedia Online. Retrieved Jan. 20, 2008, from http://en.wikipedia.org/wiki/Glioblastoma_multiforme