DEAR DR. GOTT: I’m concerned about my son and am hoping that you can help shed some light on what the problem might be. His right upper arm and shoulder have lost a lot of muscle mass, and the problem seems to be getting to the point where he can use that arm very little.He has had X-rays, CT scans and MRIs done by both a neurologist and a neurosurgeon, with no absolute cause for the muscle loss. The neurosurgeon said he saw fluid on the spine in the MRI but indicated he doesn’t believe it is the cause of the muscle loss.

My son is 45 now. In 1983, he was diagnosed with a pituitary tumour. He had operations in 1983 and 1984, and two operations in 1989 to remove as much of the tumour as possible, which kept growing back. The last MRI he had was in 2005 and revealed the tumour was the same size as it was in 1989 after the operations.

I’m hoping you can suggest a possible cause or who he should be going to for answers.DEAR READER: The combination of chronic, progressive muscle weakness in a person with a brain tumour (that appears to grow back repeatedly) suggests to me that the tumour may be pressing on certain neurons. I recommend a second opinion from another neurosurgeon, and I would certainly advise your son to consider another operation or, perhaps, radiation therapy to shrink the tumour.This is obviously a serious situation that should be dealt with by super-specialists. Has your son’s case been reviewed by experts in a teaching hospital? If not, that may be yet another option to consider before he suffers further neurological damage that could destroy his quality of life.

To give you related information, I am sending you a copy of my Health Report “Medical Specialists.” Other readers who would like a copy should send a long, self-addressed, stamped envelope and $2 to Newsletter, PO Box 167, Wickliffe, OH 44092-0167. Be sure to mention the title.>DEAR DR. GOTT: I’m writing about the 85 year-old man who is experiencing vomiting, pounding heart, tingling sensations in the hands and esophageal problems (gastroesophageal reflux disease and Schatzki’s ring). Shouldn’t this man have a barium swallow? All of these symptoms could be related to achalasia.The lower esophageal sphincter fails to relax properly, and food is regurgitated. The dilated esophagus produces pressure that often causes a pounding-heart sensation. Achalasia can be caused by systemic scleroderma. Tingling sensations in the hands could be Raynaud’s phenomenon, a sign of scleroderma.

My son was recently diagnosed with achalasia and underwent surgery on his lower esophageal sphincter. I had never heard of this condition before, and neither have most of the people we know. But it sounds like that man might have iB>DEAR READ<$> Thank you for reminding me of achalasia (the inability of a muscle to relax) as a cause of palpitations, heartburn and vomiting. In the case I reported, you are correct that an upper gastrointestinal series with a barium swallow would be an appropriate next step. Doctor Gott is a practising physician and the author of the new book “Dr. Gott’s No Flour, No Sugar Diet,” available at most chain and independent bookstor If readers would like to contact Dr. Gott, they may write him through your newspaper or send their mail directly to Dr. Gott c/o United Media, 200 Madison Ave., 4th fl., New York, NY 10016. However, if readers want to request a newsletter, they should write to the Ohio address.