Types of Arthritis
There are over 100 types of arthritis, which can be broadly categorized into seven main groups based on their underlying causes and mechanisms.
Main Categories
- Osteoarthritis — a degenerative joint disease characterized by cartilage breakdown, joint pain, and stiffness, as seen in Knee Osteoarthritis, which affects the knee joint of former NFL player Joe Montana.
- Rheumatoid Arthritis — an autoimmune disease that causes inflammation and pain in the joints, distinguished by its symmetrical pattern of joint involvement, as exemplified by Seropositive Rheumatoid Arthritis, which affects actress Kathleen Turner.
- Psoriatic Arthritis — a type of arthritis that occurs in people with psoriasis, marked by joint pain, stiffness, and swelling, accompanied by skin and nail changes, as seen in Psoriatic Spondylitis, which affects musician Art Garfunkel.
- Gout — a type of arthritis caused by the buildup of uric acid crystals in the joints, characterized by sudden, severe attacks of pain, redness, and swelling, as exemplified by Tophaceous Gout, which affects former US President Grover Cleveland.
- Lupus — a chronic autoimmune disease that can cause arthritis, as well as inflammation in other parts of the body, such as the skin, kidneys, and brain, as seen in Systemic Lupus Erythematosus, which affects actress Selena Gomez.
- Ankylosing Spondylitis — a type of arthritis that primarily affects the spine, causing inflammation and stiffness in the vertebrae, as exemplified by Radiographic Axial Spondyloarthritis, which affects musician Mick Mars.
- Juvenile Idiopathic Arthritis — a type of arthritis that occurs in children and adolescents, characterized by persistent joint pain, stiffness, and swelling, as seen in Polyarticular Juvenile Idiopathic Arthritis, which affects child actress Chloe Perrin.
Comparison Table
| Type of Arthritis | Joint Involvement | Inflammatory Response | Treatment Options |
|---|---|---|---|
| Osteoarthritis | Asymmetrical, weight-bearing joints | Low-grade inflammation | Pain management, physical therapy, joint replacement surgery (e.g., Knee Osteoarthritis, which may require knee replacement surgery) |
| Rheumatoid Arthritis | Symmetrical, small and large joints | High-grade inflammation | Disease-modifying antirheumatic drugs (DMARDs), biologics, corticosteroids (e.g., Seropositive Rheumatoid Arthritis, which may require a combination of DMARDs and biologics) |
| Psoriatic Arthritis | Asymmetrical, small and large joints | High-grade inflammation | DMARDs, biologics, topical corticosteroids (e.g., Psoriatic Spondylitis, which may require a combination of DMARDs and biologics) |
| Gout | Acute, monoarticular | High-grade inflammation | Colchicine, nonsteroidal anti-inflammatory drugs (NSAIDs), uric acid-lowering therapy (e.g., Tophaceous Gout, which may require uric acid-lowering therapy) |
| Lupus | Variable, small and large joints | High-grade inflammation | Corticosteroids, immunosuppressants, antimalarial drugs (e.g., Systemic Lupus Erythematosus, which may require a combination of corticosteroids and immunosuppressants) |
| Ankylosing Spondylitis | Chronic, axial skeleton | High-grade inflammation | DMARDs, biologics, physical therapy (e.g., Radiographic Axial Spondyloarthritis, which may require a combination of DMARDs and biologics) |
| Juvenile Idiopathic Arthritis | Variable, small and large joints | High-grade inflammation | DMARDs, biologics, corticosteroids (e.g., Polyarticular Juvenile Idiopathic Arthritis, which may require a combination of DMARDs and biologics) |
How They Relate
The different types of arthritis can overlap, with some individuals experiencing symptoms of multiple conditions. For example, Psoriatic Arthritis and Rheumatoid Arthritis can both cause joint pain and inflammation, but they have distinct underlying mechanisms and require different treatment approaches. Ankylosing Spondylitis and Juvenile Idiopathic Arthritis can both affect the spine, but they have different age ranges and symptom profiles. Additionally, Lupus can cause arthritis, as well as other systemic symptoms, and may be confused with Rheumatoid Arthritis due to their similar joint involvement patterns. Gout can be distinguished from other types of arthritis by its sudden, severe attacks of pain and its association with uric acid buildup. Osteoarthritis can be differentiated from other types of arthritis by its degenerative joint changes and lack of systemic inflammation. Specific pairs of arthritis types that are commonly confused include Psoriatic Arthritis and Rheumatoid Arthritis, Ankylosing Spondylitis and Juvenile Idiopathic Arthritis, and Lupus and Rheumatoid Arthritis.