Medical Advisory BoardAll articles are reviewed for accuracy by our Medical Advisory Board
Educational purpose only • Exercise caution as content is pending human review
Article Review Status
Submitted
Under Review
Approved

Last updated: September 6, 2025 • View editorial policy

Personalize

Help us tailor your experience

Which best describes you? Your choice helps us use language that's most understandable for you.

Differential Diagnosis for Swelling and Sensation of Pulling at Back of Knee when Knee is Extended

  • Single most likely diagnosis
    • Baker's Cyst: This condition is characterized by a fluid-filled cyst that causes a bulge and a feeling of tightness or pulling at the back of the knee, especially when the knee is extended. The cyst can become inflamed, leading to swelling and discomfort.
  • Other Likely diagnoses
    • Meniscal Tear: A tear in the meniscus, which is the cartilage that cushions the knee joint, can cause swelling and a sensation of pulling or catching at the back of the knee, particularly with extension.
    • Ligament Sprain: Sprains to the ligaments surrounding the knee, such as the posterior cruciate ligament (PCL), can lead to swelling and instability, potentially causing a pulling sensation at the back of the knee when extended.
    • Tendinitis: Inflammation of the tendons around the knee, such as the popliteus tendon at the back of the knee, can cause pain, swelling, and a sensation of pulling when the knee is extended.
  • Do Not Miss (ddxs that may not be likely, but would be deadly if missed.)
    • Deep Vein Thrombosis (DVT): Although less common, DVT can present with swelling and pain in the leg, including the back of the knee. It's crucial to consider DVT due to its potential for severe complications, such as pulmonary embolism.
    • Popliteal Artery Aneurysm: An aneurysm of the popliteal artery, which runs behind the knee, can cause swelling, pain, and a sensation of pulling due to compression or thrombosis. This condition requires urgent medical attention.
  • Rare diagnoses
    • Ganglion Cyst: A ganglion cyst is a lump under the skin that occurs when fluid leaks from a joint or tendon, forming a cyst. Although rare at the back of the knee, it could cause swelling and a pulling sensation.
    • Neurogenic Tumor: Tumors originating from the nerves, such as neurofibromas or schwannomas, can occur at the back of the knee, causing swelling and discomfort. These are rare and usually present with additional neurological symptoms.

Related Questions

What is the most effective method to decrease stone formation in a patient with hypercalcemia?
Is tapering prednisone (corticosteroid) from 50mg by 5mg every week until 10mg, then by 2.5mg every week until discontinued an appropriate regimen?
How to manage a patient with prolactin level of 3.0 on cabergoline (dopamine agonist) 0.25mg twice a week?
Is tapering prednisone (corticosteroid) from 50mg by 5mg every week until 10mg, then by 2.5mg every 3 days until discontinuation, an appropriate regimen?
What degree of leukocytosis (elevated white blood cell count) is expected in patients treated with corticosteroids (steroids)?
What are the best non-pharmacological interventions for acute mania?

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

Have a follow-up question?

Our Medical A.I. is used by practicing medical doctors at top research institutions around the world. Ask any follow up question and get world-class guideline-backed answers instantly.

Ask Question