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Year : 2017  |  Volume : 1  |  Issue : 2  |  Page : 47-49

Lactational adenoma: A diagnostic pitfall on fine needle aspiration cytology

1 Department of Pathology, National University Hospital, Singapore
2 Department of Pathology and Laboratory Medicine, KK Women's and Children's Hospital, Singapore
3 Department of Anatomical Pathology, General Hospital, Singapore
4 Breast Department, KK Women's and Children's Hospital, Singapore

Correspondence Address:
Mihir Gudi
Department of Pathology and Laboratory Medicine, KK Women’s and Children’s Hospital, 100 Bukit Timah Road, Singapore 229899
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/ijcpc.ijcpc_16_17

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Pregnancy induces hormone-related breast changes which pose diagnostic challenges in the evaluation of a breast lump. In particular, fine needle aspiration cytology of a lactating adenoma may mimic malignancy. The authors present a case of a woman with a right breast lump. Fine needle aspiration cytology demonstrated the presence of numerous single-occurring epithelial cells with large round nuclei, discrete nucleoli, and ample vacuolated cytoplasm. Taken in isolation, this finding would be suspicious for malignancy. However, the clinical history of recent pregnancy was duly noted as was the presence of a granular vacuolated background on cytology. An accompanying core biopsy confirmed the lesion to be a lactating adenoma. This case highlights lactating adenoma as a potential diagnostic pitfall on fine needle aspiration cytology.

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