“Bilateral Giant Papillomas of the Breast- 15 Year Natural History” A Case Report and Literature Review Danon Garrido, MD, Lucy M. De La Cruz, MD, Alberto Zarak, MD, Beth-Ann Lesnikoski, MD. Department of Surgery,University of Miami Miller School of Medicine Regional Campus, Atlantis Florida Introduction/Background Intraductal papillary lesion of the breast belongs to a wide group of pathologic findings termed as papillary lesions of the breast. Diverse morphological appearance, clinical presentation, imaging findings, clinical behavior, and clinical significance characterize this group of lesions.1 Intraductal papilloma without atypia found on core needle biopsy remains a controversial issue in terms of surgical management, since some studies suggest that these lesions do not require excision due to low risk of developing further malignancy.2 Case Presentation A 63 year-old Haitian woman presents to clinic complaining of an enlarging right breast mass for the past two years which she initially noted a small mass under the nipple fifteen years ago and had previous negative mammograms in her home country. She denied personal or family history of breast/ovarian cancer; Multiparous, denied OCP use or hormonal replacement therapy. On clinical exam there was no erythema, no skin thickening and no peau d’orange in either breast. Nipples were everted without spontaneous discharge or retraction. Right breast had macro lobulated mass 20cm by palpation with the nipple areolar complex on the inferior surface of the mass. The left breast mass at the 3 o’clock subareolar position which appeared to be approximately 5.0 x 2.0 cm by palpation. Ultrasound showing 10.7 x 10.3 x 13.4 cm exophytic mass of the right breast and left breast 9.0x8.0x11.0cm mass at the 3 o’clock position in the subareolar region. Vacuum assisted biopsy of both lesions (left breast- intraductal papilloma and florid adenosis and right breast -intraductal papilloma with atypia ). An MRI 12 x 9 cm multiloculated cystic mass on the right with papillary type mural masses on the lateral cyst wall highly suggestive of malignancy; on the left there was a 6 x 1.5 cm cm tubular dilated ductal structure with an adjacent 6 mm enhancing lesion. Pathology reports were not felt to be concordant. Excision was recommended. Surgical treatment with wide local excision and batwing mastopexy of the right breast and simple wide local excision on the left. Pathology of the right mass revealed a low-intermediate nuclear grade ductal carcinoma in situ arising within, and extensively involving an 8cm intraductal papilloma. Pathology of the left mass revealed an intraductal papilloma with associated lactiferous duct ectasia. Post-operatively, the patient recovered without complications. Discussion The majority of current studies suggest intraductal papilloma has a risk of developing a concurrent high risk lesion and thus recommend resection. There is of course some controversy. Our patient presents a unique example of the natural course a papilloma can take. While this is only one patient, this example of such a slow and mostly benign course may cause us to re-consider mandatory excision in the management of asymptomatic intraductal papilloma diagnosed on core needle biopsy.