Keratin cyst as a diagnostic pitfall in aspiration cytology of phyllodes tumor. Issue 10 (15th July 2021)

• Record Type: Journal Article
• Authors: Paul, Pranoy; Agrawal, Shruti; Kumar, Kranthi; Chaudhary, Mriganki; Rao, Shalinee; Ravi, Bina
• Is Part Of: Diagnostic cytopathology. Volume 49:Issue 10(2021)
• Page Start: E385
• Page End: E388
• Publication Date: 2021-07-15
• Subjects: epidermal inclusion cyst -- fibroepithelial lesion -- FNA breast -- keratin cyst -- phyllodes; Cytodiagnosis -- Periodicals; Pathology, Cellular -- Periodicals; Cytology -- Periodicals; 616.07582
• DOI: 10.1002/dc.24828
• Languages: English
• ISSNs: 8755-1039

Abstract

Abstract: 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.