The recently proposed diagnostic algorithm for progressive multifocal leukoencephalopathy underscores the importance of imaging and emphasizes the role of the radiologist in the diagnostic workup. We describe a case series of patients with visual symptoms and a typical pattern of brain involvement in definite progressive multifocal leukoencephalopathy, for which we have coined the term barbell sign.
From the *Department of Radiology, Beth Israel Deaconess Medical Center, Boston, MA;
†Department of Radiology, Bristol Royal Hospital for Children and the University of Bristol, Bristol, United Kingdom; and
‡Department of Radiology, Tygerberg Hospital, Stellenbosch University, Cape Town, South Africa.
Received for publication November 22, 2017; accepted November 27, 2017.
Correspondence to: Abraham Fourie Bezuidenhout, MD, Department of Radiology, Beth Israel Deaconess Medical Center, WCB90, 330 Brookline Ave, Boston, MA, 02215 (e-mail: email@example.com).
The authors declare no conflict of interest.