False negative bone scanを呈した前立腺癌の1例

A CASE OF PROSTATIC CANCER OF FALSE NEGATIVE BONE SCAN

緒言

　進行した前立腺癌は高頻度に骨転移を来し，骨X線に変化が現れる以前に骨スキャンに変化が現れるので，早期診断として骨スキャンが用いられるが^1），最近われわれは骨X線が陽性を示すにもかかわらず骨スキャンにて変化を認めない症例を経験したので，若干の文献的考察を加え，報告する。

A 68-year-old male came to Saiseikai Utsunomiya Hospital with complaints of urinary retention and lumbago. Prostate was palpated hard and walnut in size. Bone X-ray showed osteoblastic metastases remarkably in all bones, although ^99mTc-diphosphonate bone scan revealed negative finding. The histological examination showed well differentiated adenocarcinoma. He was diagnosed as stage D prostatic cancer.

He underwent bilateral orchiectomy and had estrogen therapy. He is well two years postoperatively.