ehealthyland.com

An x-ray may be helpful in diagnosing knee osteoarthritis. In a conventional x-ray the cartilage is invisible – how much cartilage has been lost is judged by the gap between the bones of the joint. A conventional x-ray can easily miss the early stages of knee osteoarthritis. And two radiologists may interpret the same x-rays differently. An MRI shows soft tissue (and bones) can also show the joint in motion

Diffraction Enhanced X-Ray Imaging (DEI) is a new type of x-ray that shows soft tissue as well as bone. The application of DEI to cartilage imaging was patented recently but is not yet in clinical use.

Diagnosis is made with reasonable certainty based on history and clinical examination.X-rays may confirm the diagnosis. The typical changes seen on X-ray include: joint space narrowing, subchondral sclerosis (increased bony formation around the joint), subchondral cyst formation, and osteophytes. Plain films may not correlate with the findings on physical examination or with the degree of pain. Usually other imaging techniques are not necessary to clinically diagnose osteoarthritis.

In 1990, the American College of Rheumatology, using data from a multi-center study, developed a set of criteria for the diagnosis of hand osteoarthritis based on hard tissue enlargement and swelling of certain joints. These criteria were found to be 92% sensitive and 98% specific for hand osteoarthritis versus other entities such as rheumatoid arthritis and spondyloarthropathies.

Related pathologies whose names may be confused with osteoarthritis include pseudo-arthrosis. This is derived from the Greek words pseudo, meaning “false”, and arthrosis, meaning “joint.” Radiographic diagnosis results in diagnosis of a fracture within a joint, which is not to be confused with osteoarthritis which is a degenerative pathology affecting a high incidence of distal phalangeal joints of female patients.

Your surgeon will take your medical history, gathering information about your general health and asking you about the extent of your knee pain and your ability to function, as well as a physical examination to assess your knee motion, stability and strength and overall leg alignment. X-rays to determine the extent of damage and deformity in your knee will be taken. Occasionally blood tests, an MRI (magnetic resonance imaging) or a bone scan may be needed to determine the condition of the bone and soft tissues of your knee.

Clinical History: The doctor begins by asking the patient to describe the symptoms, and when and how the condition started. Good doctor-patient communication is important. The doctor can give a better assessment if the patient gives a good description of pain, stiffness, and joint function, and how they changed over time. It is also important for the doctor to know how the condition is affecting the patient’s work and daily life. Finally, the doctor also needs to know about other medical conditions and whether the patient is taking any medicines.

1.Laboratory Tests: Laboratory tests may be recommended to help diagnose osteoarthritis by ruling out conditions with similar symptoms.

2.Other Tests: The doctor may order blood tests to determine the cause of symptoms. Another common test includes “joint aspiration,” where fluid is drawn from the joint for examination.

3.X Rays: Doctors take x rays to see how much joint damage has been done. X rays of the affected joint can show such things as cartilage loss, bone damage, and bone spurs. But there is often a big difference between the severity of osteoarthritis that the x ray shows and the degree of pain and disability the patient has. And x rays may not show early osteoarthritis damage (before much cartilage loss has taken place).

4.Physical Examination: The doctor will check the patient’s general health. Joints bothering the patient will be examined, including checking reflexes and muscle strength. The doctor will also observe the patient’s ability to walk, bend, and carry out activities of daily living.

5.Imaging Tests:X-rays are often helpful for tracking the status of osteoarthritis over time, but x-rays may appear normal during the early stages.

Other types of imaging tests, such as ultrasound and magnetic resonance imaging (MRI), may be used to detect damage to cartilage, ligaments, and tendons, which cannot be seen on x-ray.

Osteoarthritis is often visible in x-rays. Cartilage loss is suggested by certain characteristics of the images:

1.Bony projections, cysts, or erosions are visible.

2.There is an abnormal increase in bone density.

3.The normal space between the bones in a joint is narrowed.

If the doctor suspects other conditions, or if the diagnosis is uncertain, additional tests are necessary.

It is important to note that a negative x-ray does not rule out osteoarthritis. Likewise, some people may have minimal symptoms even though an x-ray clearly shows they have arthritis.

The diagnosis of osteoarthritis is largely made by obtaining a detailed history and conducting a complete physical examination. Ancillary diagnostic tests may occasionally be necessary when the diagnosis remains uncertain. The usual presenting symptom is pain involving one or only a few joints. Joint involvement is usually symmetric. Morning joint stiffness that usually resolves within 30 minutes or occurs with mild-to-moderate activity is also common. As the disease progresses, prolonged joint stiffness and joint enlargement are evident. Crepitus, or a grating sensation in the joint, is a late manifestation. Limitation of joint movement may be due to flexion contractures or mechanical obstructions.

Incoming search terms:

• subchondral cyst knee
• osteoarthritis knee xray sclerosis