Symptoms and Early Warning Signs

Recognizing the early signs of Multiple Epiphyseal Dysplasia (MED) is the first step toward proactive management. Because MED affects the structural “fit” of the joints, the symptoms are often mechanical—meaning they are triggered by movement and physical stress on the bones ^[1].

Early Childhood Signs

Symptoms usually become noticeable between the ages of 2 and 10 ^[1]. Because the condition is rare, these signs are sometimes mistaken for other childhood issues.

The “Waddling” Gait

One of the most common early signs is a change in how a child walks. This is often described as a waddling gait, where the hips shift more than usual from side to side ^[1]. In children, parents may also notice them walking with their toes pointed significantly inward or outward to compensate for hip or knee discomfort.

Activity-Induced Pain and Fatigue

Individuals with MED often experience pain in the hips, knees, or ankles. Unlike common “growing pains,” which typically occur at night and feel like a dull muscle ache, MED pain is usually:

• Joint-specific: Located directly in the joint rather than the large muscles of the leg ^[1].
• Worsened by activity: Pain tends to increase during or immediately after physical play or exercise ^[2].
• Linked to fatigue: Children may tire more quickly than their peers and ask to be carried or sit down during long walks, while adults may find their endurance for standing or walking is limited.

Mechanical Symptoms: Locking and Catching

As the irregular surfaces of the bone ends (the epiphyses) move against each other, mechanical issues can arise ^[3].

• Catching: This feels like a momentary “snag” or hesitation during movement, as if the joint is bumping over a small pebble.
• Locking: The joint (most often the knee) may get temporarily “stuck” in one position, making it difficult to fully straighten the leg ^[3][2]. This is often caused by the irregular shape of the joint or by small pieces of cartilage, known as loose bodies, that have detached and floated into the joint space ^[4].

Is it MED, Growing Pains, or Arthritis?

It can be difficult to tell MED apart from other conditions without imaging, but there are key differences:

Adulthood and Early-Onset Osteoarthritis

While childhood symptoms focus on gait and mechanical snags, the primary concern in adulthood is early-onset osteoarthritis ^[7].

Because the joints have been “mismatched” since childhood, the protective cartilage wears down faster than normal ^[1]. While the general population might experience osteoarthritis in their 60s or 70s, individuals with MED may begin to notice significant joint wear in their 20s, 30s, or 40s ^[7][8]. This progression is why long-term monitoring and joint-preserving strategies are so vital from an early age ^[1].