This is lesion are most commonly seen in which disease?

Ans. D. RAIn RA, Articular manifestations (Erosive arthritis) -a. Pain aggravated by movement is the most common manifestationi. Joint swelling, tenderness and limitation of motionii. The DIP joints rarely involved.iii. Baker's cyst - caused by extension of inflamed synovium into the popliteal space.iv. Axial involvement is limited to atlantoaxial joint (cervical spine)v. Characteristic deformities of hand include -b. Z deformity - Radial deviation of wrist with ulnar deviation of the digits, Ulnar deviation of fingers is Pathognomic.c. Swan - neck deformity - Extension contracture of PIP joints with compensatory flexion of DIP jointsd. Boutonniere deformity - flexion of PIP joints with extension of DIP joints.e. Eversion at hindfoot (subtalar joint), plantar subluxation of metatarsal heads, widening of forefoot, hallux valgus, and lateral deviation and dorsal subluxation of toes; hammertoe.f. Wind - sweep deformities of toes i.e. valgus deformities of toes in one foot and varus in other, (as wind sweeps all the structure in one direction).g. A hammer toe or contracted toe is a deformity of the proximal interphalangeal joint of the second, third, or fourth toe causing it to be permanently bent, resembling a hammer. Mallet toe is a similar condition affecting the distal interphalangeal joint.h. Claw toe is another similar condition, with dorsiflexion of the proximal phalanx on the lesser metatarsophalangeal joint, combined with flexion of both the proximal and distal interphalangeal joints. Claw toe can affect the second, third, fourth, or fifth toes.