Tuesday, September 29, 2009

Pituitary Macroadenoma

This topic is of personal interest to me because my ex-husband was diagnosed with one of these tumors at age 33. The diagnosis and surgery were one of the most stressful periods of my life. I thought I would share the story with all of you for my blog this week. (Note: He has given me permission to post this story on my blog).

I had just found out I was pregnant with our 4th child (something the surgeon was amazed by, since these tumors tend to diminish fertility) about 2 days prior to my ex-husband getting a really severe headache. The headache passed and he thought perhaps it was a migraine although he had never had one before. A few nights later he woke up in the middle of the night screaming in pain. He said he had the worst headache of his life and needed to go to the ER. We went to the ER where he spent 18 hours and had a lumbar puncture and head CT without contrast, both of which showed nothing. (Interestingly enough, we learned in class that MR is the modality of choice for pituitary adenoma and I lived through that. The head CT missed the pathology). He was sent home with a diagnosis of migraine and migraine medication. He spent the next two days taking the migraine medication with no improvement, unable to eat, and had to get IV fluids at our family doctor due to dehydration. I took him back to the ER two days later when he woke up with double vision. At that time he had a MR and the adenoma was found. We were told the extreme pain was from the tumor bleeding into his brain.

The surgery was done through his nose. The neurosurgeon went through his sinuses and removed the tumor and all of his pituitary gland. After surgery he looked remarkably like Jimmy Durante. His nose was about 3 times the normal size. He spent 1 night in the ICU and then was transferred to the regular floor. He immediately began having problems with urinary output (way too much, since the pituitary controls fluid balance and his had been removed). We spent a tense few days waiting on the final pathology report before he was told it was a benign tumor. Because the pituitary regulates the thyroid gland and his pituitary had been removed he had to start taking synthroid. It took a long time to get his synthroid dosage correct and over the years he had to have it adjusted several times. He also had some residual peripheral vision defects due to the tumor pressing on his optic nerve. He had sinus trouble where he had never had any previously – many more sinus infections and colds. He has been followed with regular MR, eye exams and endocrinologist visits.

This image is from the web and shows a pituitary macroadenoma pre and post removal.

Reference:

http://neurosurgery.ucla.edu/images/Pituitary%20Program/NF_giant_macroadenoma1.jpg



Wednesday, September 23, 2009

Week 2 - Cholesteatoma


A cholesteatoma is a benign cyst of the middle ear. It usually presents with symptoms of hearing loss, dizziness and ear drainage. It can be congenital but is more commonly caused by frequent ear infections. With frequent ear infections the eustachian tubes don’t work well. The negative pressure in the tube causes the eardrum to pull the wrong way. This causes a pocket to form, and that pocket fills with old skin cells and debris and that is how the cholesteatoma is formed. The risk of the cholesteatoma is that it will break down the delicate bones of the ear and result in permanent hearing loss. So they are removed surgically to prevent any additional damage to the ear.
We see a lot of patients in our office with cholesteatoma. Many of them have hearing loss and are being monitored for recurrence because once you have a cholesteatoma you are more likely to get one again. It is important that these patients be followed closely so hearing can be preserved.
This image is from the web. You can see the cholesteatoma eroding the mastoid air cells.

Reference:

Cholesteatoma (n.d). Accessed on September 23, 2009 at https://www.google.com/health/ref/Cholesteatoma

Web image from:
http://www.bcm.edu/oto/jsolab/tngallery/pages/cholesteatoma%20with%20erosion%20into%20the%20cochlea.htm

Tuesday, September 15, 2009

Skull Fractures












I decided to do my path log this week on skull fracture because I work weekend option shift at a large Indianapolis hospital and the CT techs see some head trauma. I thought it would be worthwhile to learn a bit about it.

There are two types of skull fractures – linear and depressed. The image on the left is of a linear fracture. The linear fracture is the most common type, making up about 75% of skull fractures. These fractures are most commonly seen in the temporal and parietal bones of the skull. In a depressed fracture (second most common type) the skull fragments are depressed below the skull and into the brain tissue (see image on right). If the depressed fracture goes deeper than the thickness of the skull bone then surgery is usually required to elevate the bone, as well as inspect the brain for signs of injury.

The patient with skull fracture may present with obvious trauma to the head. Patients lose consciousness only about half of the time with both types of fractures. Depending on where the fracture is the patient may also have neurological deficits (they tend to correspond with the area of brain injured). Obvious risks of a depressed skull fracture are foreign matter being pushed into the brain. This will leave the patient vulnerable to infection. Both linear and depressed skull fractures may result in bleeding between the layers of the brain (subdural, epidural hematomas) or bleeding into the brain (hemmorhage).

When imaging for skull fracture always look at the scan in the bone windows so you don't miss it!

Image (left) from Website: Introduction to Head CT. Accessed September 15, 2009 at http://www.med-ed.virginia.edu/courses/rad/headct/

Image (right) from Website: Downie, A. (2001). Tutorial: CT in Head Trauma. Accessed September 15, 2009 at http://www.radiology.co.uk/srs-x/tutors/cttrauma/tutor.htm

Joseph, R. (n.d.) Skull Fractures, Accessed September 15, 2009 at http://brainmind.com/SkullFractures.html



Tuesday, September 1, 2009

New Blog

Well, another semester begins. This is my new pathology blog. Stay tuned for weekly postings!