Infectious arthritis is an important medical emergency with high morbidity. The most frequent causative organism of infectious
arthritis is Staphylococcus aureus, and Candida is an uncommon pathogen. Candida arthritis has been reported to occur in seriously
ill or immunocompromised patients and neonates. We report the first case of C. parapsilosis arthritis in a patient with ulcerative
colitis. A 52-year-old woman was diagnosed with ulcerative colitis 1 year previously and took balsalazide. Pain and swelling in the
right knee joint developed 6 months after diagnosis. She was diagnosed with enteropathic arthritis associated with ulcerative colitis
and took methotrexate, sulfasalazine, and prednisolone for 3 months, but the symptoms did not improve. We finally diagnosed her
with infectious C. parapsilosis arthritis by culturing the synovial fluid. The patient received amphotericin B for 6 weeks and
underwent arthroscopic synovectomy. She finally experienced improvement of inflammation in the right knee joint