一位22歲年輕人，偶有抱怨下背痛，其不適在某一姿勢時較明顯。臨床理學及血液檢查正常, x光骨骼檢查亦無異樣，被轉介至核醫進行鎝-99m-MDP骨造影檢查進一步探究原因。骨造影則在兩側腎臟上方各出現，一活性增加區域，該活性異常部位在病人站立並走動10分鐘後，再造影即消失。腎臟超音波則在相對部位出現，有明顯血管影像，該血管壓迫上腎盂形成尿流阻塞可能造成腎性疼痛，此與Fraley氏徵候群一致。

A 22-year-old youth presented with occasional pain over low back region in sitting position. 99mTc_MDP bone scintigraphy showed two areas of increased radiouptake each in upper calyxes of bilateral kidneys， which resolved after 10 min stand-up and walk-around. Renal sonography showed a vascular pattern in the corresponding area seen on bone scan. The findings of upper cali ectases due to vascular compression consisted with Fraley's syndrome， a rare cause of nephralgia.