Rosai Dorfman disease (RDD) or sinus histiocytosis is a rare non-neoplastic idiopathic disease characterized by massive lymphadenopathy in young adults. Extranodal involvement is seen in 25%–43% cases. RDD is usually self-remitting. However, it mimics lymphoproliferatve disorders clinically as well as on imaging. We present the 18F-FDG PET/CT findings in a 46-year-old female patient with nodal RDD.
From the Department of Nuclear Medicine, All India Institute of Medical Sciences, New Delhi, India.
Received for publication November 26, 2012; revision accepted January 7, 2013.
Conflicts of interest and sources of funding: none declared.
Reprints: Rakesh Kumar, MD, PhD, Department of Nuclear Medicine, All India Institute of Medical Sciences, E-81, Ansari Nagar (East), AIIMS Campus, New Delhi 110029, India. E-mail: firstname.lastname@example.org.