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Published on: October 14, 2021
Mast cell sarcoma: a rare and potentially under-recognized diagnostic entity with specific therapeutic implications
Russell J H Ryan1, Cem Akin, Mariana Castells
1Pathology Service, Massachusetts General Hospital, and Harvard Medical School, Boston, MA 02115, USA.
Summary
Mast cell sarcoma is a rare, aggressive cancer. This study details its pathological features and suggests it may be under-recognized, potentially aiding targeted therapy development.
Area of Science:
- Oncology
- Pathology
Background:
- Mast cell sarcoma is a rare, aggressive neoplasm of malignant mast cells.
- Pathologic features are not well-established due to limited case reports.
Observation:
- Three new cases of mast cell sarcoma are presented.
- Morphology includes medium-to-large epithelioid cells and multinucleated cells, distinct from normal mast cells or systemic mastocytosis.
- One case had a history of infantile cutaneous mastocytosis.
Findings:
- None of the three cases were initially diagnosed correctly, indicating potential under-recognition.
- Molecular testing did not reveal the KIT D816V mutation.
Implications:
- Accurate diagnosis is crucial for appropriate patient management.
- Absence of KIT D816V mutation suggests alternative targeted therapies may be effective.
- Further research is needed to fully characterize mast cell sarcoma.
