Figure 7.

(a) CT of a patient with disseminated DLBCL showing diffuse enlargement of the left gluteus muscle (white arrow) with adjacent lytic destruction of the left iliac bone (white arrowhead). (b) Contrast-enhanced T1-weighted fat-saturated MR image of the same patient showing diffusely enlarged and enhancing left gluteus and erector spinae muscles. (c) CT of a different patient with Burkitt lymphoma of the colon (white arrowhead). There is diffuse involvement of the left gluteus and iliacus muscles (white arrows) with erosion of underlying iliac bone (black arrowhead). (d) Ultrasonograph of the abdomen of another patient with abdominal pain shows a hypoechoic right paravertebral mass. V indicates vertebral body. (e) Coronal CT of the same patient shows the ultrasonographic finding to be a diffusely enlarged right psoas muscle, subsequently diagnosed as marginal zone lymphoma on biopsy. (f) PET/CT with FDG showing avidity of the tumour (white arrow), which extends to the right erector spinae muscle (black arrowhead) as well as retroperitoneal lymphadenopathy (white arrowhead).