Mantle Cell Lymphoma Presenting as a Subcutaneous Soft Tissue Mass With an Unusual Appearance
The patient is a 61-year-old man with a medical history of hypertension who originally presented for an ultrasound of a right lower-back mass, which had been growing for 2 weeks. A magnetic resonance imaging (MRI) was initially recommended based on the ultrasound appearance. However, before the MRI was performed, he presented to the emergency department with flank pain and weight loss. Physical examination showed diffuse lymphadenopathy, and laboratory tests showed elevated creatinine. He underwent a computed tomography (CT) of the chest, abdomen, and pelvis (Figs. 1 and 2).