Suprapatellar bursitis is the kind of condition that sounds manageable until it isn't. The swelling above the kneecap, the stiffness when trying to fully flex the joint, the dull ache after sitting for too long — the standard playbook is straightforward: rest, ice, anti-inflammatory medication, maybe a cortisone injection if things persist.

If you are dealing with quadriceps contracture — whether it developed after an injury, a series of injections, a surgical procedure, or simply showed up as stiffness and limited knee flexion that refuses to resolve — you have likely received the standard advice: stretch more, do physical therapy, push through it.

There is a particular frustration in feeling pain at the back of your knee, especially when you cannot fully bend or extend without that deep, aching pinch. You may have been told to rest, apply ice, and do some generic stretching.

Posterior cruciate ligament mucoid degeneration is one of those diagnoses that tends to arrive quietly — picked up on an MRI ordered for unexplained posterior knee pain, creeping stiffness, or a slow loss of full flexion.