In reading a picture of asymmetric testicular FDG activity, the possibility of unilateral atrophic testis that absorbs less radioactivity should be kept in mind.

• 在判读睪丸不对称之氟-18-去氧葡萄糖摄取活性时，须注意单侧萎缩睪丸导致摄取减少的可能性。