Cyclin D1 expression in Rosai-Dorfman disease: a near-constant finding that is not invariably associated with mitogen-activated protein kinase/extracellular signal–regulated kinase pathway activation

Sofía Garcés, L. Jeffrey Medeiros, Mario L. Marques‐Piubelli, Sheila Aparecida Coelho Siqueira, Roberto N. Miranda, Branko Cuglievan, Vathany Sriganeshan, Ana Maria Medina, Juan Carlos Garcés, Karan Saluja, Meenakshi B. Bhattacharjee, Joseph D. Khoury, Shaoying Li, Jie Xu, Fatima Zahra Jelloul, Beenu Thakral, C. Cameron Yin