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Sinus histiocytosis with massive lymphadenopathy. Multiple skull involvements
1Department of Pathology, College of Medicine, Kyung Hee University, Seoul, Korea. damia@chollian.net
Journal of Korean Medical Science
|September 19, 1998
Summary
Sinus histiocytosis with massive lymphadenopathy, a rare bone disorder, can present with unusual extranodal skull lesions. This case highlights the importance of considering this benign condition in differential diagnoses for bone lesions.
Area of Science:
- Oncology
- Pathology
- Radiology
Background:
- Sinus histiocytosis with massive lymphadenopathy (SHML) is a rare, benign proliferation of unknown etiology, typically affecting lymph nodes.
- While generally self-limiting, extranodal involvement, particularly in bone, is uncommon and presents diagnostic challenges.
Observation:
- A 45-year-old female presented with multiple, destructive skull lesions.
- Radiological imaging revealed masses within the skull's diploid space, showing specific signal intensities on MRI.
- Histopathological examination demonstrated characteristic histiocytic proliferation with features like lymphocytophagocytosis.
Findings:
- The skull lesions exhibited features consistent with SHML, including S-100 protein and lysozyme positivity in histiocytes.
- The findings underscore the potential for SHML to manifest with significant osseous involvement.
Implications:
- This case expands the known spectrum of SHML presentation, emphasizing the need for its inclusion in the differential diagnosis of lytic bone lesions.
- Accurate diagnosis is crucial to avoid misclassification as a malignant neoplasm, ensuring appropriate patient management.