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Malignant phyllodes tumor metastatic to the forearm: a case report
P S Rocha1, R G Pinto, N S Nadkarni
1Department of Pathology, Goa Medical College, Bambolim, India.
Diagnostic Cytopathology
|April 29, 2000
Summary
Malignant phyllodes tumor can metastasize, as seen in a forearm lesion diagnosed via fine-needle aspiration. Histologic stromal overgrowth is key to predicting this rare tumor's metastatic potential.
Area of Science:
- Oncology
- Cytopathology
- Surgical Pathology
Background:
- Malignant phyllodes tumors are rare breast neoplasms with unpredictable behavior.
- Metastasis from phyllodes tumors, though uncommon, necessitates accurate diagnostic methods.
- Understanding cytological features aids in predicting clinical outcomes.
Observation:
- A 40-year-old female presented with a right forearm swelling one year after mastectomy for malignant phyllodes tumor.
- Fine-needle aspiration (FNA) cytology diagnosed the forearm lesion as a metastatic malignant phyllodes tumor.
- Histologic review of the primary breast tumor revealed significant stromal overgrowth.
Findings:
- Cytological features of FNA can identify metastatic malignant phyllodes tumor.
- Stromal overgrowth in the primary tumor is a critical histologic predictor of metastatic potential.
- This case highlights the importance of correlating cytological and histological findings for rare tumors.
Implications:
- Accurate cytological diagnosis of metastasis is crucial for patient management.
- Identifying predictive histologic features like stromal overgrowth can guide treatment strategies.
- Further research into predictive markers for phyllodes tumor metastasis is warranted.