Abstract: A 71-year-old man presented with a progressive right knee pain which persisted for 6 months and was not relieved by pain medications. He had a history of lung squamous carcinoma 1 year ago. X-ray and magnetic resonance imaging (MRI) revealed hyperostosis, degenerative changes, and occupancy lesions of the right patella. The patient underwent 99mTc methylene diphosphonate (99mTc-MDP) bone scan and single photon emission tomography/computed tomography (SPECT/CT), which showed abnormal metabolism of the right patella with bone destruction and soft tissue swelling. Finally, patellectomy was taken and pathology confirmed patella metastasis from lung squamous carcinoma.
From the Department of Nuclear Medicine, Zhongshan Hospital, Fudan University, Shanghai, China.
Received for publication February 11, 2012; and revision accepted September 10, 2012.
Conflicts of interest and sources of funding: none declared.
Reprints: Hongcheng Shi, MD, PhD, Department of Nuclear Medicine, Zhongshan Hospital, Fudan University, Shanghai 200032, China. E-mail: firstname.lastname@example.org.