tore my acl when I was 22 yrs old. never had it fixed, instead using a lenox-hill brace and continued playing sports up until the last 5 years. I am now 56 yrs old and will need a replacement. my knee joints are not lining up correctly and recently started to develop a lump that is semi- hard although I can push on it and there feels like there is fluid in it
Dear sir/mam, the only way the treat the lining problems and the lump is to do a total knee replacement. Meanwhile if you don't have pain that seems to me a little difficult you should consider doing qua Chat Doctor.  I repeat only if you don't have pain.