Hi,Welcome with your query to HCM virtual Clinic.
I reviewed all the details of your query.
Based on the facts of your query,the cause of the hard lump seems to be-PrePatellar Bursitis(Housemaids Knee)/or it could be Fibrosed
Hematoma,formed due to hard hit ,as you don't deny having hard hit.
As I don't have direct information and as you haven't yet shown to any doctor except your cardiologist,I would suggest to take
Second Opinion from your Orthopedic Surgeon/ or
General Surgeon.He would investigate /check and treat it accordingly.
Hope this reply would help you to plan treatment with your doctors and resolve your worries.
Will appreciate writing excellent review and feedback comments to help the needy patient visitors like you at HCM.
Welcome any further query and information in this regard.
Contact at My HCM Clinic,with direct Premium question for further suggestions if need be.
Good Day!!
Dr.Savaskar M.N.
Senior Surgical Specialist
M.S.Genl-CVTS