Isolated cerebral Rosai-Dorfman disease presenting as a sole mass protruding into the fourth ventricle: A case report

Fourth Ventricular Rosai-Dorfman Disease Mimicking Intraventricular Tumor in Young Adult: A Rare Case Report

Rosai-Dorfman disease (RDD) or sinus histiocytosis with massive lymphadenopathy can present with or without systemic disease. It is a benign histioproliferative disorder characterized by generalized lymphadenopathy, weakness, anemia, and rarely extranodal involvement. While RDD most commonly affects lymph nodes, extranodal involvement of multiple organs has been reported, including the central nervous system (CNS). However, CNS involvement in RDD is rare and is not well characterized. Isolated involvement of the fourth ventricle is even rarer. Such lesions may be mistaken for intraventricular tumors such as ependymoma or medulloblastoma. This report highlights the necessity to consider RDD as a differential diagnosis in case of intraventricular space-occupying lesion.

A lesion of the patella: An unexpected location of Rosai-Dorfman disease: A case report

Introduction

Primary osseous Rosai-Dorfman disease (RDD) is a rare and benign disease that can pose diagnosis challenges.

Presentation of the case

We report the case of a 29-year-old woman who presented with pain in her left patellar region for the past 6 months with no other clinical sign especially no lymphadenopathy associated. A surgical excision was done. Histopathology confirmed the diagnosis of a primary RDD patellar disease. The patient was followed up for 2 months without any recurrence. The aim of this study was to present a rare case of RDD in a patellar location and to review clinicopathological features, therapeutic modalities, evolutionary aspects and prognosis of a primary patellar RDD.

Discussion and conclusion

The diagnosis of a primary osseous RDD without associated lymphadenopathy should be kept in mind when a sclero-lytic lesion is found. Excision of the lesion is the gold standard of the treatment.

•

Isolated patellar RDD is rare.

•

The diagnosis is made on histopathological examination of resected tissue

•

Prognosis is good and disease course is not aggressive

Intracranial Rosai Dorfman Disease Presented With Multiple Huge Intraventricular Masses: A Case Report

Introduction

Rosai-Dorfman disease (RDD) usually presents with painless cervical lymphadenopathy during the two first decades of life, with or without extranodal involvement. Exclusive extranodal manifestation, and especially central nervous system (CNS) involvement, is uncommon. The etiology remains unknown and definitive diagnosis is based on characteristic histopathological and immunohistochemical features showing S100(+) CD1a(−) RDD type histiocytes with emperipolesis. Most CNS cases are dural-based masses.

Case Presentation

Herein, we present a case of RDD in an 8-year-old boy, who presented with multiple huge intraventricular masses.

Conclusion

Regarding rare CNS involvement and lack of established evidence-based therapeutic approaches, reports of any individual case can supply further beneficial data concerning treatment approaches and long-term effectiveness of therapeutic strategies.