Showing posts with label inferior petroal sinus sampling. Show all posts
Showing posts with label inferior petroal sinus sampling. Show all posts

Wednesday, March 27, 2013

Early diagnosis of pediatric Cushing’s disease improved surgical outcomes


Lonser RR. J Clin Endocrinol Metab. 2013;93:892-901.

  • March 27, 2013
Early postoperative endocrine testing could predict lasting remission among pediatric patients with Cushing’s disease, according to recent study findings published in the Journal of Clinical Endocrinology & Metabolism. Other findings suggest early diagnosis has the potential to improve surgical outcomes due to an association with younger age, smaller adenomas and lack of dural invasion.
Researchers at the NIH included 200 pediatric patients (106 females, 94 males) with Cushing’s disease in the prospective observational study from 1982 to 2010. The mean age was 10.6 years (range; 4 to 19 years) at the time of symptom development and 13.7 years at the time of the NIH study. However, 27 (13%) patients underwent prior surgery at another institution, the researchers reported.
Using MRI, researchers identified adenomas in 97 patients (50%); when positive, the MRI accurately specified discrete adenoma in 96 of the 97 patients (99%). The researchers wrote that this was more accurate compared with adrenocorticotropic hormone (ACTH) ratios during inferior petrosal sinus sampling to influence adenoma lateralization (accurate in 72% of patients without prior surgery).
Moreover, 195 of the 200 patients (98%) demonstrated remission after surgery (189 [97%] were hypocortisolemic; six [3%] were eucortisolemic postoperatively). Factors associated with initial remission (P<.05) included identification of an adenoma at surgery, immunohistochemical ACTH-producing adenoma and noninvasive ACTH adenoma.
According to researchers, younger age, smaller adenoma and absence of cavernous sinus wall or other dural invasion were associated with long-term remission (P<.05). Finally, minimum morning serum cortisol of less than 1 mcg/dL after surgery also demonstrated a positive predictive value for a lasting remission of 96%, the researchers wrote.

Disclosure: The researchers report no relevant financial disclosures.

Saturday, November 3, 2012

A Quarter of a Century

I had my one, and only, pituitary surgery on this date in 1987.  Of course, I was trying to get a diagnosis for several years before that.

I know it's hard to get a diagnosis now - imagine how hard it was over 30 years ago - before the Internet, Facebook, Twitter, message boards, chatrooms.  No online support - no support anywhere. 

Finding any information possible at the Public Library.  Days that you feel like death warmed over, heading out to the library to Xerox medical articles you don't understand, poring over them at home, trying to find any kernel of hope for what you have.  Then trying to convince doctors when your family doesn't even believe you.

Finally, a doctor believes you...but he's the wrong kind of doctor so he sends you away.  Another year goes by.  The endo recommends surgery but there are only 3 possibilities anywhere.  NIH - close by and free, Montreal - they speak French - and San Francisco.  

After a diagnosis, 6 weeks of inpatient testing at the NIH.

From my bio at http://www.cushings-help.com/maryos_story.htm

 

There were about 12 of us there and it was nice not to be alone with this mystery disease. Many of these Cushies (mostly women) were getting bald, couldn't walk, having strokes, had diabetes. One was blind, one had a heart attack while I was there. Towards the end of my testing period, I was looking forward to the surgery just to get this whole mess over with. While I was at NIH, I was gaining about a pound a day!

The MRI still showed nothing, so they did a Petrosal Sinus Sampling Test. That scared me more than the prospect of surgery. (This test carries the risk of stroke and uncontrollable bleeding from the incision points.) Catheters were fed from my groin area to my pituitary gland and dye was injected. I could watch the whole procedure on monitors. I could not move during this test or for several hours afterwards to prevent uncontrolable bleeding from a major artery. The test did show where the tumor probably was located. Also done were more sophisticated dexamethasone suppression tests where drugs were administered by IV and blood was drawn every hour (they put a heplock in my arm so they don't have to keep sticking me). I got to go home for a weekend and then went back for the surgery - the Transsphenoidal Resection. I fully expected to die during surgery (and didn't care if I did) so I signed my will and wrote last letters to those I wanted to say goodbye to. During the time I was home just before surgery, a college classmate of mine (I didn't know her) did die at NIH of a Cushing's-related problem. I'm so glad I didn't find out until a couple months later!

November 3, 1987, the surgeon, Dr. Ed Oldfield, cut the gum above my front teeth under my upper lip so there is no scar. He used tiny tools and microscopes. My tumor was removed successfully. In some cases (not mine) the surgeon uses a plug of fat from the abdomen to help seal the cut. Afterwards, I was in intensive care overnight and went to a neurology ward for a few days until I could walk without being dizzy. I had some major headaches for a day or two but they gave me drugs (morphine) for those. Also, I had cotton plugs in my nostrils. It was a big day when they came out. I had diabetes insipidus (DI) for a little while, but that went away by itself - thank goodness!

I had to use a foam product called "Toothies" to brush my teeth without hitting the incision. Before they let me go home, I had to learn to give myself an injection in my thigh. They sent me home with a supply of injectible cortisone in case my level ever fell too low (it didn't). I was weaned gradually off cortisone pills (scary). I now take no medications. I had to get a Medic Alert bracelet. I will always need to tell medical staff when I have any kind of procedure - the effects of my excess cortisone will remain forever.

I went back to the NIH for several follow-up visits of a week each where they did all the blood and urine testing again. After a few years NIH set me free. Now I go to my "outside" endocrinologist every year for the dexamethasone suppression test, 24-hour urine and regular blood testing.

As I get further away from my surgery, I have less and less chance that my tumor will grow back. I have never lost all the weight I gained and I still have the hair on my chin but most of my other symptoms are gone. I am still and always tired and need a nap most days. I do not, however, still need to take whole days off just to sleep.

I consider myself very lucky that I was treated before I got as bad as some of the others on my floor at NIH but think it is crazy that these symptoms are not taken seriously by doctors.

 

 

Sunday, May 1, 2011

Spinning Out of Control

Unexplained symptoms left Shana Leslie feeling like an old woman trapped in a 30-year-old’s body.

By Susan Flynn

Throughout 2007, Shana Leslie* developed acne, experienced increasingly shorter menstrual periods and gained more than 20 pounds, mostly in her midsection. Her friends were not surprised. “I had just turned 30, was in the middle of a divorce and had recently been promoted at work,” says Ms. Leslie. “So everybody told me it was related to stress.”

The explanation seemed reasonable to Ms. Leslie, a single mom raising a young son in northeast Ohio. She bought larger clothes and visited a dermatologist. But by November, she noticed more changes. Hair sprouted on her upper lip and grew farther down her hairline. Ms. Leslie’s periods stopped completely, and her ankles swelled.

“The only other time my ankles had been so swollen was when I was pregnant, so I went to my obstetrician,” she says. After ruling out pregnancy, the doctor sent Ms. Leslie to an internist. Her blood pressure was very high — 170/110.

Like the young woman’s friends, the physician thought stress might be partly to blame, so he prescribed anti-anxiety drugs and medicine to reduce blood pressure. A month later, during a work seminar in North Carolina, the room seemed to spin. “I had heart palpitations, and I felt like I was going to faint,” Ms. Leslie recalls. At the local hospital, emergency room doctors confirmed her blood pressure was high but couldn’t find anything else wrong.

Back home in Ohio, her internist changed Ms. Leslie’s medication, but an adverse reaction landed her in a nearby hospital. She underwent a gamut of tests: a CT scan, an MRI and blood work. Still, physicians found nothing wrong. Ms. Leslie’s frustration grew.

“My body was spinning out of control,” she says. “I was shaking all the time, and I couldn’t sleep.” Bruises began to dot her legs and stretch marks lined her stomach. In February 2008, Ms. Leslie hit an unrelated snag when she lost one of her contact lenses. This hitch was the turning point for her.

She visited an optometrist, who noticed she had ocular hypertension — higher than normal pressure inside the eye. She mentioned her high blood pressure. After informing her that the two were unrelated, the optometrist listened to Ms. Leslie’s whole story. “He said I had to be my own healthcare advocate,” she says. “He really made me start thinking.”

Ms. Leslie turned to the Internet and began researching secondary hypertension, the only clear-cut condition diagnosed so far. A website mentioned that one cause was Cushing’s syndrome, a rare disorder triggered by prolonged exposure to elevated levels of the hormone cortisol. “Everything on the list of symptoms fit me to a T,” she recalls.

She returned to her internist, who ordered a blood test to check her cortisol levels. They were off the chart. An endocrinologist ran two additional screening tests for Cushing’s. Both showed high cortisol levels. The endocrinologist referred Ms. Leslie to Amir H. ­Hamrahian, MD, an endocrinologist at Cleveland Clinic with expertise in pituitary disorders. “At this point, I couldn’t walk up the stairs,” says Ms. Leslie. “I felt like an old woman stuck in a 30-year-old’s body.”

Dr. Hamrahian recalls first meeting Ms. Leslie, who showed him photos of her thin and vibrant self from just a year before. “You couldn’t recognize the same person,” he says. “She was really in need of help.” Cushing’s syndrome can be tricky to diagnose because weight gain and anxiety are common. Depression, obesity, diabetes and other conditions can also elevate cortisol levels. However, looking at Ms. Leslie’s whole clinical picture, Dr. Hamrahian diagnosed Cushing’s. Excessive cortisol causes skin atrophy, loss of collagen and insulin resistance, the reasons for Ms. Leslie’s stretch marks, bruising and weight gain.

Dr. Hamrahian ordered an MRI to check for tumors on the pituitary gland at the base of the brain. The pituitary controls the amount of cortisol produced by the adrenal gland. Pituitary tumors are the most common cause of Cushing’s. The MRI showed nothing, but he did not give up. He sent his patient to the National Institutes of Health (NIH) in Bethesda, Md., for a procedure called inferior petrosal sinus sampling (IPSS), in which doctors draw blood from the inferior petrosal sinuses, which drain the pituitary. Doctors at NIH compared the levels of adrenocorticotropin hormone, which spurs release of cortisol, from Ms. Leslie’s petrosal sinuses to levels from a vein in her arm. The IPSS revealed higher levels in the sinuses, indicating that a tumor in the pituitary gland was causing her Cushing’s syndrome.

On May 30, 2008, Cleveland Clinic surgeon Robert Weil, MD, of the Neurological Institute and the holder of the Melvin H. Burkhardt Chair in Neuro-Oncology Clinical Research, removed two 3-millimeter tumors. Since then, Ms. Leslie has gradually returned to health. Her cortisol levels and blood pressure are normal, the acne is gone, her menstrual cycle has resumed, and she has lost 40 pounds. “In experienced hands, there is a good chance of cure or long-term remission,” says Dr. ­Hamrahian. “Most symptoms resolve, but patients need to be monitored lifelong for any signs of recurrence.”

Ms. Leslie is grateful for this second chance. “I’m working out, playing with my son and living my life the way someone my age should be,” she says.

* The patient’s name was changed to protect her privacy.

From http://cchealth.clevelandclinic.org/diagnosis-challenge/spinning-out-control