UCLA Radiological Sciences Proceedings

Tubular adenomas are rare, benign breast tumors primarily found in postmenarchal, premenopausal women. We report a case of tubular adenoma in a 56-year-old man with a history of alcoholic cirrhosis. The breast mass was incidentally discovered on computed tomography imaging performed as part of a patient liver transplant evaluation. Dedicated breast imaging and ultrasound-guided biopsy confirmed the diagnosis of tubular adenoma.

Osteoid osteoma is a benign bone-forming tumor with characteristic clinical and imaging features. Clinically, patients present with pain at the site of the tumor, worsening at night and relieved by nonsteroidal anti-inflammatory drugs. The typical imaging features of osteoid osteoma include a round or oval intracortical radiolucent lesion with surrounding cortical thickening and reactive sclerosis. However, intra-articular osteoid osteoma often has imaging and clinical features that deviate from those of osteoid osteoma, which may result in delayed diagnosis. We report a case of intra-articular osteoid osteoma in a 20-year-old woman with a history of ankle pain. The variant clinical and imaging characteristics of intra-articular osteoid osteoma and the important considerations for the treatment of patients with this condition are briefly discussed.

Tarlov cysts are cystic structures of neurogenic origin that arise most commonly in the roots of the sacrococcygeal nerves. Prompt and correct identification can prevent unnecessary biopsy of the cysts, a procedure which can cause significant pain because they contain nerve fibers and ganglion cells. We report two cases of Tarlov cysts mimicking adnexal masses on ultrasound evaluation. The first case was misidentified on an ultrasound before being diagnosed as a Tarlov cyst during follow-up magnetic resonance imaging. The second case was initially identified by the sonographer as an ovarian cyst but was properly identified through correlation with prior computed tomography imaging. In this case series, we discuss the pathologic and radiographic features, etiology, clinical considerations, and treatment of Tarlov cysts.