Welcome to the forum.
Well, without a clinical evaluation it would be difficult to determine the cause of the lump. Possibilities that may need to be considered include enlarged bursa, lipomas
, cysts, growths from underlying connective tissue
Sometimes, a fluid filled structure just above the knee cap called supra patellar bursa is chronically inflamed, with or without pain, due to some infection or trauma and the process causes fibrosis
and inflammation, making a lump like structure above the knee cap.
I would suggest getting this evaluated by an orthopedician for an accurate diagnosis and appropriate management. You may get the X-ray of the area affected and FNAC (fine needle aspiration cytology) of lump under his/her guidance.
I hope this information has been both informative and helpful for you.
You can consult me again directly through my profile http://www.healthcaremagic.com/doctors/dr-saurabh-gupta/64132
Dr Saurabh Gupta.