99mTc-methylene diphosphonate bone scintigraphy showing diffusely increased left rib cage uptake (anterior a, posterior b; arrows). Transaxial single photon emission computed tomography (SPECT) and SPECT/CT images (c, e; arrows) show diffusely increased radiotracer uptake involving the left-sided ribs. Transaxial CT (bone window, d) shows normal left-sided ribs with regular cortical outlines. Transaxial CT (soft tissue window, f) shows a pleural-based soft tissue density lesion in the left lung lower lobe (f, arrow head) with diffuse circumferential pleural thickening (f, arrow)
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