Intracystic (encysted) papillary carcinoma of breast
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The ultrasound shows a 35 mm complex cyst with:
- posterior acoustic enhancement
- low-level internal echoes (intracystic debris)
- an ovoid hyperechoic nodule (10 x 5 mm) on inner wall, projecting into the cystic lumen.
In the operating theatre the lesion was partially aspirated (haemorrhagic fluid) to prevent an accidental rupture and then it was completely removed under local anaesthesia.
Final pathological diagnosis: intracystic papillary carcinoma, with positive estrogen and progesterone receptors , negative HER-2-neu receptor and a Ki-67 index of 8%.
The intracystic (encysted) papillary carcinoma is a rare carcinoma with incidence of 0.5% to 1% of all breast cancers, usually seen in elderly women.
It is considered as an in situ or minimally invasive neoplasm.