One case report of sacroiliitis with P. P. P. was reported. The patient was a 35-year-old female. She felt severe pain in her right buttock and could not walk and sit on and her palmar and plantar areas showed dirty dermatitis. Blood examination showed inflammatory findings. Pathological findings of sacroiliac joint showed chronic nonspecific and nonsuppurative osteomyeritis. After open biopsy her pain and P. P. P. decreased slowly though we could not understand the cause.
