Salvo Nadia, Christakis Monique, Rubenstein Joel, de Sa Eric, Napolskikh Julie, Sinclair Emily, Ford Michael, Goh Philiz, Chow Edward
Department of Radiation Oncology, Sunnybrook Odette Cancer Centre, Toronto, Ontario, Canada.
J Palliat Med. 2009 Feb;12(2):195-8. doi: 10.1089/jpm.2008.0055.
Approximately 50% of patients with cancer will develop skeletal metastases, which often lead to significant pain. When a patient complains of pain, a bone scan and/or plain x-rays are ordered as investigations. X-rays necessitate a 1-cm diameter mass and 50% bone mineral loss at minimum for detection. Up to 40% of lesions will be unidentified by x-rays, presenting false-negative results. Computed tomography (CT) scans can recognize a bony metastatic lesion up to 6 months earlier than an x-ray. However, plain x-rays can also lead to rare false-positive results. We present a case with a false-positive result in a patient with lung cancer.
约50%的癌症患者会发生骨转移，这常常导致严重疼痛。当患者主诉疼痛时，会安排骨扫描和/或普通X光片作为检查手段。X光片检测至少需要直径1厘米的肿块以及50%的骨矿物质流失。高达40%的病灶X光片无法识别，会出现假阴性结果。计算机断层扫描（CT）能比X光片早6个月识别骨转移病灶。然而，普通X光片也可能导致罕见的假阳性结果。我们报告一例肺癌患者出现假阳性结果的病例。
