FDG-PET/CTで高集積を呈した頸椎周囲の転移性石灰沈着の1例

Mass-forming metastatic calcification of the cervical spines with abnormal 18F-FDG uptake：a case report

慢性腎臓病ではミネラル代謝異常を原因として全身に様々な骨関節病変を引き起こす。その中でも転移性石灰沈着は骨以外の組織へリン酸カルシウムの沈着をきたすが，まれに腫瘤を形成することがある。今回我々は長期透析患者に生じた頸椎周囲の腫瘤様の転移性石灰沈着の1例を経験し，FDG-PET/CTで異常集積を呈したので，若干の文献的考察を含めて報告する。

A 77 year-old-man, who had been undergoing hemodialysis for 11 years, was referred to our hospital with a painful mass of the neck. Radiography and CT demonstrated multilobulated calcified lesions adjacent to the cervical spines. FDG-PET/CT showed abnormal ¹⁸F-FDG uptake in the mass, suggesting a malignancy. Incisional biopsy made a diagnosis of metastatic calcification. To our knowledge, it was a first case of metastatic calcification with abnormal ¹⁸F-FDG uptake.