title: The prognoses of metaplastic breast cancer patients compared to those of triple-negative breast cancer patients.
abstract: Metaplastic breast carcinoma (MBC) is a rare, heterogeneous breast cancer characterized by admixture of adenocarcinoma with metaplastic elements, low hormone receptor expression, and poor outcomes. The authors retrospectively reviewed the medical records of 47 MBC patients and 1,346 invasive ductal carcinoma (IDC) patients. Two hundred eighteen of the IDC patients were triple-negative (TN-IDC) for estrogen receptor, progesterone receptor, and human epidermal growth factor receptor-2 (ER-/PR-/HER2-). Patients were surgically treated at the Samsung Medical Center between 2005 and 2009. The MBC patients presented with a larger tumor size, lower lymph node involvement, higher histological and nuclear grades, higher triple negativity (ER-/PR-/HER2-) and higher p53, CK5/6, and EGFR expressions compared with those of the IDC group. However, there were no significant differences in clinicopathological characteristics between MBC and TN-IDC. During the follow-up period (median duration of 30.3 months, range 2.6-56.3 months), seven (14.9%) MBC patients, and 98 (7.1%) IDC patients had disease recurrence. The three-year disease-free survival (DFS) rate was 78.1% in the MBC group and 91.1% in IDC group (P < 0.001). The three-year DFS rate was not significantly different between the MBC and TN-IDC groups (78.1 vs. 84.9%, P = 0.114). However, in patients with lymph node metastasis who underwent adjuvant chemotherapy, the three-year DFS rate was 44.4% in the MBC group and 72.5% in the TN-IDC group (P = 0.025). The authors found that MBC had a poorer clinical outcome than did IDC. In breast cancer patients with nodal metastasis, MBC had a poorer prognosis than did TN-IDC, despite adjuvant chemotherapy.
authors.affiliation: Department of Surgery, Division of Breast and Endocrine Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Irwon-dong, Gangnam-gu, Seoul, 135-710, Republic of Korea.
authors.forename: Soo Youn
authors.initials: SY
authors.lastname: Bae
authors.forename: Se Kyung
authors.initials: SK
authors.lastname: Lee
authors.forename: Min Young
authors.initials: MY
authors.lastname: Koo
authors.forename: Sung Mo
authors.initials: SM
authors.lastname: Hur
authors.forename: Min-Young
authors.initials: MY
authors.lastname: Choi
authors.forename: Dong Hui
authors.initials: DH
authors.lastname: Cho
authors.forename: Sangmin
authors.initials: S
authors.lastname: Kim
authors.forename: Jun-Ho
authors.initials: JH
authors.lastname: Choe
authors.forename: Jeong Eon
authors.initials: JE
authors.lastname: Lee
authors.forename: Jung-Han
authors.initials: JH
authors.lastname: Kim
authors.forename: Jee Soo
authors.initials: JS
authors.lastname: Kim
authors.forename: Seok Jin
authors.initials: SJ
authors.lastname: Nam
authors.forename: Jung-Hyun
authors.initials: JH
authors.lastname: Yang
mesh_terms: D000328:Adult; D001943:Breast Neoplasms / Q000175:diagnosis* / Q000378:metabolism / Q000628:therapy; D018270:Carcinoma, Ductal, Breast / Q000175:diagnosis* / Q000378:metabolism / Q000628:therapy; D018572:Disease-Free Survival; D066246:ErbB Receptors / Q000378:metabolism; D005260:Female; D006801:Humans; D007633:Keratins / Q000378:metabolism; D019394:Ki-67 Antigen / Q000378:metabolism; D008207:Lymphatic Metastasis; D008875:Middle Aged; D018198:Mixed Tumor, Malignant / Q000175:diagnosis* / Q000378:metabolism / Q000628:therapy; D015999:Multivariate Analysis; D009367:Neoplasm Staging; D011379:Prognosis; D018719:Erb-b2 Receptor Tyrosine Kinases / Q000378:metabolism; D011960:Receptors, Estrogen / Q000378:metabolism; D011980:Receptors, Progesterone / Q000378:metabolism; D012189:Retrospective Studies; D016159:Tumor Suppressor Protein p53 / Q000378:metabolism
chemical_list: D066246:ErbB Receptors; D007633:Keratins; D019394:Ki-67 Antigen; D018719:Erb-b2 Receptor Tyrosine Kinases; D011960:Receptors, Estrogen; D011980:Receptors, Progesterone; D016159:Tumor Suppressor Protein p53; C495901:TP53 protein, human; C508053:ERBB2 protein, human