My father had this, though it never became so bad that he could not cope with everyday life.

My brother has recently noticed the start of the same thing, as yet it is only mild.

I had to tell him that it was hereditory condition, as my sister insists that it was due to an injury to our dad's hand.

I could suspect Viking ancestry, as I was born in York.

Fortunately I have reached the age of 58 years and my hands are still fully flexible - I can not only place my hand flat but raise the heel of my hand the width of two fingers whilst keeping my fingers flat down.

I do have a defunct thyroid - connection with goiter there.

I will pass on the information about radio therapy to my brother, as he hates doctors and will put off going until it is too late, I know, if operations are at all possible.

Anne Croucher