What condition is characterized by the medial collateral ligament issue leading to knees that stick together?

The condition that is characterized by the medial collateral ligament issue leading to knees that stick together is genu valgum, also known as "knock-knees." In this condition, the alignment of the knees causes them to angle inward, which can lead to the knees coming together while the feet remain apart. This abnormal alignment affects the biomechanics of walking and can create a characteristic appearance.

Genu valgum often arises in childhood and may be associated with various factors such as genetics, obesity, or certain diseases. It can lead to increased stress on the medial ligaments and compressive forces on the lateral aspect of the knee joint, which may cause pain and functional limitations over time. Understanding the mechanics of genu valgum is crucial for treatment options, including physical therapy, orthotics, or surgical interventions if necessary.

Other conditions listed, such as genu varum, osteoarthritis, and patellar tendonitis, do not specifically explain the knee alignment described in the question. Genu varum refers to bow-leggedness, while osteoarthritis is a degenerative joint disease and patellar tendonitis is an inflammation of the patellar tendon. These conditions have distinct characteristics and implications that differ from the alignment issues presented in genu valgum.