A 65-year-old woman presented with an elongated, painless soft-tissue swelling involving the ulnar aspect of the right forearm and a few erythematous, nontender, and nonpruritic papules on both thighs and trunk. She denied any fever, chills, or night sweats. Her history was significant only for asthma and hypothyroidism. On evaluation, the mass was firm but mobile with no discoloration of the overlying skin (Fig 1). There were no associated motor or sensory impairments and no history of trauma. The rest of the history and physical examination were noncontributory. MRI of the right forearm revealed an elongated mass extending approximately 14 cm along the ulnar aspect of the forearm. The mass had low signal intensity similar to muscle on the T1-weighted image shown below (Fig 2) and high signal intensity on the T2-weighted image. The lesion was enhanced with gadolinium (Fig 3). The mass was removed, and the biopsy specimens showed noncaseating granulomas without acid-fast bacilli, fungi, other organisms, or foreign-body particles. A chest radiograph revealed bilateral hilar adenopathy (Fig 4.