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Arthritis

The smooth cartilage that lines a joint is not merely a protective layer but a vital component that allows bones to glide without friction, and when this layer is lost, the result is a grinding sensation that defines the condition known as arthritis. This mechanical failure transforms the body's movement from fluid to painful, often leading to bone-on-bone contact that can be felt in the hips, knees, shoulders, and fingers. The onset of this condition can be gradual, creeping in over years as a person ages, or it can strike suddenly with redness, warmth, and swelling that signals an inflammatory process. While the term arthritis is derived from the Greek words for joint and inflammation, the reality of the disease extends far beyond simple joint pain, affecting other organs such as the skin and causing systemic issues that can leave a person unable to carry out their work or complete daily activities. The condition is not a single disease but a general medical term describing a disorder where the protective cartilage is lost, resulting in bone grinding on bone during joint movement, a process that can be exacerbated by prior injury or long-term wear-and-tear.

The Silent Invaders

Rheumatoid arthritis is a disorder in which the body's own immune system starts to attack body tissues specifically the cartilage at the end of bones known as articular cartilage, turning the body's defense mechanism into a weapon against itself. This autoimmune attack is not only directed at the joint but to many other parts of the body, leading to severe progressive deformity in a matter of years if not adequately treated. The disease often affects joints in the fingers, wrists, knees, and elbows, appearing symmetrically on both sides of the body, and can lead to conditions such as ulnar deviation, swan neck, and boutonniere deformity of the hand. In children, the disorder can present with a skin rash, fever, pain, disability, and limitations in daily activities, while in adults, it is often associated with elevated erythrocyte sedimentation rate and C-reactive protein levels. The inflammation of the synovium, the lining of the joint capsule, is caused in part by the production of pro-inflammatory cytokines and receptor activator of nuclear factor kappa B ligand, a cell surface protein present in Th17 cells and osteoblasts. This complex biological process leads to bone erosion and can be directly induced by osteoblasts through the RANK/RANKL mechanism, creating a cycle of destruction that requires aggressive treatment to control.

The Crystal Storm

Gout is a form of arthritis caused by excessive uric acid production, resulting in urate crystals depositing in joints, particularly in extremities such as the toes, where the pain can be significant and potentially debilitating. During a gout flare, the affected joints often become swollen with associated warmth and redness, and the resulting pain can be so severe that it prevents one from doing activities that they would normally do as part of their daily routine. The condition is often associated with excessive intake of alcohol and food, such as red meat, and is also linked to body factors affecting urate clearance from the blood, a topic remaining under study. In the early stages of gout, usually only one joint is affected, however over time, many joints can become affected, and the condition can lead to the formation of tophi, which are deposits of urate crystals under the skin. Management of gout involves the use of anti-inflammatories, such as NSAIDs, colchicine, or glucocorticoids, and in between gout flares, it is recommended that patients take medications that decrease the production of uric acid or increase the elimination of uric acid from the body. There is also an uncommon form of gout that is known as pseudogout, which is caused by the formation of calcium pyrophosphate crystals in the joint, and unlike gout, no targeted treatments are currently available.

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Aging-associated diseasesInflammationsRheumatologySkeletal disorders

Common questions

What is the definition of arthritis based on cartilage loss?

Arthritis is a general medical term describing a disorder where the protective cartilage is lost, resulting in bone grinding on bone during joint movement. This mechanical failure transforms the body's movement from fluid to painful, often leading to bone-on-bone contact that can be felt in the hips, knees, shoulders, and fingers.

How does rheumatoid arthritis affect the body's immune system and joints?

Rheumatoid arthritis is a disorder in which the body's own immune system starts to attack body tissues specifically the cartilage at the end of bones known as articular cartilage. This autoimmune attack is not only directed at the joint but to many other parts of the body, leading to severe progressive deformity in a matter of years if not adequately treated.

What causes gout and how does it differ from pseudogout?

Gout is a form of arthritis caused by excessive uric acid production, resulting in urate crystals depositing in joints, particularly in extremities such as the toes. There is also an uncommon form of gout that is known as pseudogout, which is caused by the formation of calcium pyrophosphate crystals in the joint, and unlike gout, no targeted treatments are currently available.

When did the first known traces of human arthritis appear in history?

The first known traces of human arthritis date back as far as 4500 BC, making it one of the oldest known ailments of prehistoric peoples. Evidence of arthritis has been found throughout history, from Ötzi, a mummy found along the border of modern Italy and Austria, to the Egyptian mummies.

How many adults in the United States have doctor-diagnosed arthritis according to 2013 to 2015 data?

A CDC survey based on data from 2013 to 2015 showed 54.4 million adults had self-reported doctor-diagnosed arthritis, and 23.7 million had arthritis-attributable activity limitation. Arthritis is the most common cause of disability in the United States, and more than 20 million individuals with arthritis in the United States have severe limitations in function on a daily basis.

What are the primary treatment options available for arthritis and joint replacement duration?

Treatment options vary depending on the type of arthritis and include physical therapy, exercise and diet, orthopedic bracing, and oral and topical medications. Joint replacement surgery known as arthroplasty can last anywhere from 15 to 30 years depending on the patient, and common joints that are replaced due to arthritis include the shoulder, hip, and knee.

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The Ancient Bones

Evidence of osteoarthritis and potentially inflammatory arthritis has been discovered in dinosaurs, and the first known traces of human arthritis date back as far as 4500 BC, making it one of the oldest known ailments of prehistoric peoples. It was noted in skeletal remains of Native Americans found in Tennessee and parts of what is now Olathe, Kansas, and evidence of arthritis has been found throughout history, from Ötzi, a mummy found along the border of modern Italy and Austria, to the Egyptian mummies. In 1715, William Musgrave published the second edition of his most important medical work, De arthritide symptomatica, which concerned arthritis and its effects, and Augustin Jacob Landré-Beauvais, a 28-year-old resident physician at Salpêtrière Asylum in France, was the first person to describe the symptoms of rheumatoid arthritis. Though Landré-Beauvais' classification of rheumatoid arthritis as a relative of gout was inaccurate, his dissertation encouraged others to further study the disease, and John Charnley completed the first hip replacement in England to treat arthritis in the 1960s, marking a significant milestone in the history of treatment.

The Cost of Movement

Arthritis is the most common cause of disability in the United States, and more than 20 million individuals with arthritis in the United States have severe limitations in function on a daily basis, making it a significant economic burden. Absenteeism and frequent visits to the physician are common in individuals who have arthritis, and it is estimated that the total cost of arthritis cases is close to 100 billion dollars, of which almost 50% is from lost earnings. Disability due to musculoskeletal disorders increased by 45% from 1990 to 2010, and among the many reports on the increased prevalence of musculoskeletal conditions, data from Africa are lacking and underestimated. In the United States, a CDC survey based on data from 2013 to 2015 showed 54.4 million adults had self-reported doctor-diagnosed arthritis, and 23.7 million had arthritis-attributable activity limitation, and with an aging population, this number is expected to increase. Adults with co-morbid conditions, such as heart disease, diabetes, and obesity, were seen to have a higher than average prevalence of doctor-diagnosed arthritis, and the condition is more common in women than men at all ages and affects all races, ethnic groups and cultures.

The Battle for Function

There is no known cure for arthritis and rheumatic diseases, and treatment options vary depending on the type of arthritis and include physical therapy, exercise and diet, orthopedic bracing, and oral and topical medications. Joint replacement surgery may be required to repair damage, restore function, or relieve pain, and a number of surgical interventions have been incorporated in the treatment of arthritis since the 1950s. The primary surgical treatment option of arthritis is joint replacement surgery known as arthroplasty, and common joints that are replaced due to arthritis include the shoulder, hip, and knee. Arthroscopic surgery for osteoarthritis of the knee provides no additional benefit to patients when compared to optimized physical and medical therapy, and joint replacement surgery can last anywhere from 15 to 30 years depending on the patient. Following joint replacement surgery, patients can expect to get back to several physical activities including those such as swimming, tennis, and golf, and people with hand arthritis can have trouble with simple activities of daily living tasks, such as turning a key in a lock or opening jars, as these activities can be cumbersome and painful.

The Invisible War

Lupus is an autoimmune collagen vascular disorder that can be present with severe arthritis, and in fact, about 90% of patients with Lupus have musculoskeletal involvement, with symptoms that can often mimic those of rheumatoid arthritis with similar stiffness and pain patterns. Joints in the fingers, wrist, and knee tend to be the most affected, and other features commonly seen in patients with Lupus include a skin rash, extreme photosensitivity, hair loss, kidney problems, and shortness of breath secondary to scarring that occurs in the lungs. The disease can also affect other organs, such as the skin, and can lead to a variety of symptoms including malaise and fatigue, weight loss, poor sleep, muscle aches and pains, and tenderness. The condition is a complex interplay of immune system dysfunction and inflammation, and while there is no cure, early diagnosis and appropriate aggressive treatment can lead to better control of symptoms and a better quality of life compared to those without treatment.