Hi! thanks for sharing your husband's health concerns with HCM!
After going through your description of a hard lump on the inside of his right knee right around the
meniscus area following kind of heavy exercises, I would like to comment that this is a benign and possibly degenerative or age-related condition and there is nothing to worry really!
This is a fairly common clinical situation in my clinic and I would like to consider following possibilities as per my knowledge of needle biopsies:
1. bursa or BAKER'S
cyst which is a degenerative or inflammatory pseudocyst-like condition; possibility 90%
2. throbmosed or dilated veins possibility 5%
3. loose bodies, synovial herniation or benign tumor-like conditions; possibility 5%
Therefore you need not be worried but please see a
general surgeon or orthopedic surgeon for a physical examination and the further needful....
Wishing your husband good health; Regards,