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Related Concept Videos

Knee Joint01:23

Knee Joint

The knee joint is the most complicated joint in the body. It consists of three articulations– two tibiofemoral and one patellofemoral. As is characteristic of synovial joints, the knee joint has a thin articular capsule that partially surrounds this joint cavity. Additionally, several ligaments, muscles, and cartilaginous structures support the movement of the knee.
A total of seven ligaments support the knee joint. The patellar ligament, which is also attached to the quadriceps femoris group...
Ankle Joint01:10

Ankle Joint

The ankle is formed by the talocrural joint (crural = leg). It consists of the articulations between the talus bone of the foot and the distal ends of the tibia and fibula of the leg. The superior aspect of the talus bone is square-shaped and has three areas of articulation. The top of the talus articulates with the inferior tibia. This is the portion of the ankle joint that carries the body weight between the leg and foot. The sides of the talus are firmly held in position by the articulations...
Venous Thrombosis II: Clinical Manifestations and Diagnostic Studies01:20

Venous Thrombosis II: Clinical Manifestations and Diagnostic Studies

The key difference between Superficial Vein Thrombosis (SVT) and Deep Vein Thrombosis (DVT) lies in their location and severity.Clinical ManifestationsSVT typically presents with localized pain, tenderness, and redness along the course of a superficial vein, often accompanied by a palpable, cord-like structure under the skin. This condition is usually less dangerous than DVT but can be uncomfortable and may lead to complications such as cellulitis or, rarely, a clot extension into the deep...
Nephrotic Syndrome I : Introduction01:24

Nephrotic Syndrome I : Introduction

Nephrotic Syndrome is a chronic kidney disorder defined by clinical findings such as severe proteinuria, hypoalbuminemia, hyperlipidemia, and edema. These symptoms result from damage to the glomeruli, the kidney’s filtering units, increasing their permeability to proteins.Definition and Meaning:Proteinuria, defined as the loss of more than 3.5 grams of protein per day in adults, is a crucial feature of nephrotic syndrome. This condition is often accompanied by edema, the accumulation of fluid...
Development of the Limb Synovial Joints01:07

Development of the Limb Synovial Joints

Joints form during embryonic development in conjunction with the formation and growth of the associated bones. The embryonic tissue that gives rise to all bones, cartilage, and connective tissues of the body is called mesenchyme.
The mesenchymal stem cells differentiate into chondrocytes that form the hyaline cartilage, and later the cartilaginous model of the bone. This model further transforms into a bone. This process is known as endochondral ossification.
During development, the limbs...
Bones of the Lower Limb: Femur and Patella01:16

Bones of the Lower Limb: Femur and Patella

The femur is the body's longest and strongest bone spanning the thigh region. Its head articulates with the acetabulum of the hip bone to form the hip joint. A minor indentation on the medial side of the femoral head, called the fovea capitis, serves as the site of attachment for the ligament of the head of the femur. This weak ligament spans the femur and acetabulum and supports the hip joint. The narrowed region below the head is the neck of the femur. The inclination angle between the neck...

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Updated: Jul 16, 2026

Tuina Intervention in Sodium Monoiodoacetate Injection-Induced Rat Model of Knee Osteoarthritis
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[Knee pain--localized pigmented villonodular synovitis].

Anton Kristensen Ulstrup1

  • 1Køge Sygehus, Ortopaedkirurgisk Afdeling. akulstrup@gmail.com

Ugeskrift for Laeger
|February 22, 2007
PubMed
Summary

Extraarticular localised pigmented villonodular synovitis (LPVS) in the knee can mimic infrapatellar bursitis. Accurate diagnosis requires histological verification after surgical treatment.

Area of Science:

  • Orthopedics
  • Pathology
  • Radiology

Background:

  • Extraarticular localised pigmented villonodular synovitis (LPVS) is a rare condition.
  • Accurate diagnosis of knee joint abnormalities is crucial for effective treatment.

Observation:

  • A case of extraarticular LPVS in the knee was initially misdiagnosed.
  • Clinical presentation and magnetic resonance imaging (MRI) suggested infrapatellar bursitis.

Findings:

  • Histological examination confirmed the diagnosis of LPVS.
  • Surgical treatment involved partial arthroscopic synovectomy and total excision.

Implications:

  • Highlights the importance of considering rare diagnoses in knee pathologies.

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Last Updated: Jul 16, 2026

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  • Emphasizes the role of histology in confirming diagnoses that may be ambiguous on imaging.
  • Underscores the need for careful clinical correlation with imaging findings.