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A case of interdigitating dendritic cell sarcoma/histiocytic sarcoma--a diagnostic pitfall
Rebecca L Johnson1, Saskia Boisot2, Edward D Ball3
1Department of Pathology, University of California San Diego Health System La Jolla, CA 92093-0987.
This case report details a rare instance of histiocytic sarcoma (HS) potentially arising from interdigitating dendritic cell sarcoma (IDCS). Diagnosis challenges with limited biopsy samples are highlighted.
Area of Science:
- Hematopathology
- Oncology
- Rare Neoplasms
Background:
- Interdigitating dendritic cell sarcoma (IDCS) and histiocytic sarcoma (HS) are rare hematolymphoid neoplasms.
- Distinguishing between these entities can be challenging, especially with limited tissue samples.
Observation:
- A case of IDCS in a mesenteric mass was initially diagnosed via fine needle aspiration (FNA) and core needle biopsy.
- Following chemotherapy, the patient developed HS, diagnosed from an excised small intestinal specimen.
Findings:
- This represents a potential first report of HS derived from IDCS in English literature.
- The relationship is likely a transformation, though co-existence cannot be excluded.
Implications:
- Highlights diagnostic difficulties of rare sarcomas with limited biopsy material.
- Suggests a potential evolutionary pathway between IDCS and HS, impacting treatment strategies.
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