33yrs old man presents with recurrent pain and swelling of right knee. These symptoms started 4 yrs ago and are often precipitated by minor truma. The joint fluid has been tested during acute episodes and although clearly inflammatory there has been no evidence of irate crystals bacteria or blood. Clinical examination reveals a moderately swollen and tender joint. A CBC , PT , PTT and serum chemistried are normal . X ray films show spelling of the articular cartilage and increased joint space without marginal erosion. Which of the following is the most likely diagnosis?
- Hemophiliac arthritis
- Lyme arthritis
- Monarticular rheumatoid arthritis
- Osteoarthritis
- Pseudogout
- Psoriatic arthritis
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