An Unusual Dural-Based Tumor

Course Authors:
Joren Keylock, MD

James Hempel, MD
Department of Pathology, Madigan Army Medical Center, Tacoma, WA

Elizabeth Rushing, MD
Department of Neuropathology and Ophthalmic Pathology, Armed Forces Institute of Pathology, Washington, DC

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

• describe the usual microscopic features of Rosai-Dorfman disease.
• formulate a differential diagnosis.
• understand the key morphological features and ancillary tests used to distinguish dural-based Rosai-Dorfman disease from other lesions.
• explain the natural history and clinical signifi cance of isolated central nervous system Rosai-Dorfman disease.

The ASCP designates this educational activity for a maximum of 1 AMA PRA Category 1 Credits™. Physicians should only claim credit commensurate with the extent of their participation in the activity.

ASCP designates this activity for a maximum of 1 CMLE credit. This activity meets CMP and state licensure requirements for laboratory personnel.