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Keratin cyst as a diagnostic pitfall in aspiration cytology of phyllodes tumor
Pranoy Paul1, Shruti Agrawal1, Kranthi Kumar1
1Department of Pathology and Laboratory Medicine, AIIMS Rishikesh, Rishikesh, India.
Background:
Phyllodes tumor (PT) is a fibroepithelial lesion of breast known for presence of a heterogenous stroma. However occurrence of a keratin cyst within PT is a rare incidence. An inadequate sampling during fine needle aspiration (FNA) of such lesions may result in an erroneous cytological diagnosis.
Case Report:
In the present case, ultrasound guided FNA smears from the breast lump in a 31-year-old lady with a clinical suspicion of malignancy, were repeatedly interpreted as an epidermal inclusion cyst, which was ultimately reported as a borderline PT on mastectomy.
Conclusion:
The case report aims at highlighting the importance of a diligent FNA technique keeping in mind the possibility of the various uncommon lesions especially while dealing with such a heterogenous tumor as phyllodes.
