What are common skeletal system pathologies?

Rheumatoid arthritis is a common pathology of the skeletal system characterized by chronic inflammation of the joints, leading to joint pain, swelling, and stiffness. This autoimmune condition occurs when the body's immune system mistakenly attacks the synovium, the lining of the membranes that surround the joints. Over time, rheumatoid arthritis can result in joint erosion and deformity, significantly affecting mobility and quality of life. Its prevalence as a systemic disease and its specific impact on the skeletal system make it a notable pathology.

In contrast, tendinitis primarily affects tendons, muscle cramping involves muscle tissues, and strains pertain to injuries of muscles or tendons, rather than the skeletal system itself. Hence, these choices do not directly relate to common skeletal system pathologies like rheumatoid arthritis does.