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rGB is a new entity which has not yet appeared in the WHO classification of central nervous system (CNS) tumors. Understanding its clinical and imaging features may help to distinguish it from other tumors of CNS.

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USA) is one of the most widely used free smartphone applications allowing two or more users to exchange messages, images, audio or video easily and quickly via an Internet connection (1). It has been used efficiently among pathologists to obtain a fast second opinion, share interesting aspects of daily cases, and increase the awareness and interest of students in pathology (2-5). This platform also serves as an alternative to the microscope-mounted digital cameras particularly for the ones in undeveloped countries devoid of these devices (6). Cytopathologists and those interested in cytopathology (CPs) have been increasingly using WhatsApp to take advantage of these benefits and more.