Hi there, welcome........sorry to hear that you are having so much problem with your knee. I certainly feel your pain as I am having pretty much the exact problem. I must add also this is not the first time with this problem for me..It's been an ongoing problem for me for years now and 6 past knee surgeries. I too have the lump on the outside of the left knee, when I push on it, it tends to move around and I am fine when I usually go to sitting, but standing and walking can be very painful to me. If I sit with my legs crossed in what is know as indian style sitting, It is extremely painful when I go to stand up....My last surgery was merely to just clean up broken and torn cartlidge caused by the wear in my knee and that was in 2005. I finally broke down and went to see the OS, he suggested and MRI to see what was going on.. Once I had that done and got the results, I found out that I had what was known as a Medial Subluxation. (Meaning that there is a partial dislocation) of my knee cap, and it is not tracking properly. I also have a decent amount of fluid in the knee which doesn't make it any better... He is also suspecting that there is more torn and damaged cartlidge in there. So I am going to have my 7th knee surgery on Monday, Jan.07, 2008.....He is going to do what is known as a lateral release. I had this exact same surgery back in 1999 on the same knee. Have you seen an OS yet? have you had an MRI done yet? that would be my first suggestion to finding your answers. Not everyone is the same, so even though ours sounds much alike, the problem may actually be very different. The OS tells me that the clicking is usually telling him there is bone rubbing on bone where cartlidge is broken or damaged in there. Anyways, welcome, good luck and keep us posted! I'll be thinking of you!