Ingerlisa W. Mattoch, MD
Department of Pathology, Stanford University Medical Center, Stanford, CA

Regan Fulton, MD, PhD
Department of Pathology, Kaiser Permanente Medical Center, San Francisco, CA

Youn Kim, MD
Department of Dermatology, Stanford University Medical Center, Stanford, CA

Richard Hoppe, MD
Department of Radiation Oncology, Stanford University Medical Center, Stanford, CA

Roger A. Warnke, MD
Department of Pathology, Stanford University Medical Center, Stanford, CA

Uma N. Sundram, MD, PhD
Departments of Pathology, and Dermatology, Stanford University Medical Center, Stanford, CA

Keywords: Peripheral T-cell lymphoma; B-cell lymphoma; Cutaneous; B cells; Epstein-Barr virus

Upon completion of this activity, you will be able to:

• recognize complex cases of cutaneous peripheral T-cell lymphoma associated with a proliferation of B-cells (cutaneous PTL-B).
• define the clinical and pathologic features of cutaneous PTL-B.
• discuss the diagnostic algorithm to arrive at a correct diagnosis of cutaneous PTL-B.