HI,Dear,Thanks for your query to HCM virtual Clinic.
I studied your query in all the details put forth by you.
I understood your health concerns about the cause of hard pea sized lump on upper left side of leg.
Cause of the hard lump on left top of leg-
The facts of your query indicates that you had ?hit in the past to left knee, and it is felt only when on right side-
these two facts indicate it to be left outer meniscal tear,which becomes prominent on right sideway position.
As many other causes need to be ruled out by
Second opinion from ER Ortho-Surgeon and hence your doctors second opinion is suggested.
Hope this reply would satisfy your query and would resolve the worry with it.
If you feel satisfied with this reply,don't forget to hit thanks and write excellent review comments,which would improve my rating for new needy visitors to HCM.
Welcome for any further query in this regard to HCM.
Have a good day.
With Regards,
Dr.Savaskar M.N.
M.S.Genl-CVTS,
Senior Surgical Specialist