Preoperative diagnosis of pyoadenomyosis with 67Ga SPECT/CT.

: Abscess formation inside adenomyosis rarely occurred. A 49-year-old woman had adenomyosis for several years with the symptoms of menorrhagia and dysmenorrhea. She presented with fever of unknown etiology for 3 weeks. 67Ga SPECT/CT demonstrated increased tracer accumulation inside the uterus, which was confirmed as pyoadenomyosis after hysterectomy, and her fever subsided dramatically thereafter. For women with adenomyosis and fever of unknown origin, pyoadenomyosis is a rare but possible cause. 67Ga SPECT/CT is a valuable tool for accurate diagnosis.