Spontaneous osteonecrosis of the knee (SONK) is an idiopathic condition that leads to the development of a crescent shaped osteonecrosis lesion, mostly commonly in the epiphysis of …

SONK should be considered together with differential diagnosis of osteoarthritis, tear of medial meniscus, and tibial plateau fracture. SONK usually has a sudden onset of knee pain, while …

Feb 28, 2024 · MRI findings in the subchondral bone marrow: a discussion of conditions including transient osteoporosis, transient bone marrow edema syndrome, SONK, and shifting bone …

Osteonecrosis of the knee is a painful condition that occurs when the blood supply to a section of the femur (thighbone) or tibia (shinbone) is disrupted. Because bone cells need a steady blood …

SONK is a joint condition affecting the knee. Learn about its causes, symptoms, risks, and the importance of early diagnosis and treatment.

Nov 4, 2025 · Terminology This entity subsumes what was previously known as spontaneous osteonecrosis of the knee (SONK/SPONK) or Ahlbäck disease.

However, SONK is a progressive disease and can gradually lead to deterioration of the structures in the knee if left untreated. Keep reading to find out more about SONK, and the possible …

Dec 6, 2024 · Spontaneous Osteonecrosis of the Knee (SONK) Spontaneous osteonecrosis of the knee is a condition where a part of the bone in the knee starts to die because it doesn’t get …

SONK is the most common form of osteonecrosis of the knee. The condition most commonly affects the medial femoral condyle; although it can also affect the patella, tibial plateau, …

Feb 21, 2025 · SONK happens when blood flow to a part of the knee bone gets cut off, leading to bone tissue death. This can result in severe pain, swelling, and difficulty walking.