Authors : Roshni P. S, Sudha Haridas, Chothisha Poovan
DOI : 10.18231/j.ijpo.2025.020
Volume : 12
Issue : 1
Year : 2025
Page No : 90-93
Rosai Dorfman disease (RDD) is a histiocytic disease, which usually involves the cervical lymph nodes in majority of the cases, though it can occur less commonly in extra-nodal sites like skin, orbit, upper respiratory tract and bones. As far as bone involvement is concerned, it usually involves the long bones and contribute to around 10% of cases. Rosai Dorfman disease presenting with primary involvement of spine is a very rare scenario, with less than 1% of cases according to literature. Here is the case of a 45-year-old female who presented with complaints of mid back pain. Radiological examination showed well defined expansile lytic lesion involving the right transverse process, lamina and pedicle of T7 vertebra causing mild narrowing of T7-8 neural foramina. Excision biopsy from spinal lesion showed features of Rosai Dorfman disease and this was confirmed on immunohistochemistry.