Sentence:  Mr. A. , her fellow townsman , also experienced a nervous breakdown just as soon as he discovered that he had been bilked of his life savings by the limited practitioner who had been treating his wife - a woman suffering from an incurable disease , <WSD>multiple</WSD> sclerosis - and himself . 
Meaning of the word marked with <WSD> tags:  a chronic progressive nervous disorder involving loss of myelin sheath around certain nerve fibers