Malignant Lymphoma in the Psoas Major Muscle by Nobuhiro Akuzawa, Takashi Hatori, Aya Takase, Jun Aoki, Shinji Sakurai, Masahiko Kurabayashi

“…An 84-year-old Japanese man taking warfarin to prevent cerebral infarction secondary to atrial fibrillation was admitted to our hospital for evaluation of a painless right back mass. Magnetic resonance imaging (MRI) showed an oval-shaped mass in the right psoas major muscle. …”
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