Limited Sinonasal Rosai‐Dorfman Disease Presenting as Chronic Sinusitis

Efficacy of Radiotherapy in Patients with Relapsing Primary Rosai-Dorfman Disease of the Nasal Cavity

Rosai-Dorfman disease (RDD) is a rare proliferative disorder characterized by an overproduction of a type of immune cell called histiocytes, with unknown etiology. Although extranodal involvement is not uncommon, it is rarely seen within the nose. The available data are limited, and currently, there are no established guidelines for managing RDD. Different therapeutic options have been described, including corticosteroids, surgery, radiotherapy, or chemotherapy. This study aims to evaluate the potential benefit of radiotherapy in patients with nasal Rosai-Dorfman disease to improve the current diagnostic and therapeutic management. Herein, we report the case of a 54-year-old female patient with nasal RDD refractory to systemic corticosteroid therapy and transnasal endoscopic resection. She received fractionated low-dose radiotherapy with a total dose of 30 cGy administered in 2 cGy daily fractions. Complete remission was achieved, highlighting the potential role of radiotherapy as an effective therapeutic option for relapsing or steroid-refractory cases. This is one of the few well-documented cases reported with nasal Rosai-Dorfman disease treated with radiotherapy. Ongoing research on novel therapies offers hope for improved outcomes in relapsing cases that fail to respond to conventional treatments.

Uncommon Fibroinflammatory Sinonasal Tract Lesions: Granulomatosis with Polyangiitis, Eosinophilic Angiocentric Fibrosis, and Rosai-Dorfman Disease

Fibroinflammatory lesions of the sinonasal tract include inflammatory polyps (chronic rhinosinusitis), various infectious, sarcoidosis, and NK/T-cell lymphoma as examples of the most commonly encountered lesions. However, the differential diagnosis includes several less frequently encountered entities, such as granulomatosis with polyangiitis, eosinophilic granulomatosis with polyangiitis (Churg-Strauss), eosinophilic angiocentric fibrosis considered part of IgG4-related disease, and Rosai-Dorfman disease. This review focuses on these latter entities providing an update on clinical, laboratory, imaging, histology, and ancillary testing employed to reach an actionable diagnosis.

Uncommon presentation of Rosai-Dorfman disease: Nasal and nasopharyngeal involvement: A case report and discussion

This study presents a rare case of Rosai-Dorfman disease (RDD) with nasal and nasopharyngeal involvement, illustrating the complexities in diagnosing this enigmatic histiocytic disorder. RDD, characterized by massive, painless cervical lymphadenopathy, poses diagnostic challenges due to its diverse clinical presentations. In this case, a 38-year-old woman presented with a year-long history of neck swellings, nasal congestion, headaches, and sinusitis-like symptoms. Radiological imaging and histopathological examination revealed RDD involvement in the nasopharynx and paranasal sinuses. RDD diagnosis was confirmed through immunohistochemistry. The patient's unique symptoms emphasize the importance of considering RDD in the differential diagnosis of sinonasal masses with recurrent or unusual complaints. This case underscores the need for increased awareness, multidisciplinary management, and further research to enhance understanding and treatment of RDD, especially in extranodal presentations.