toremifene and Breast-Neoplasms--Male

HER2-positive breast tumors are found in 25-30% of patients with breast cancer and are characterized by aggressive course and reduced sensitivity to both chemotherapy and hormone therapy. The aim of the work was to study the possibilities of enhancing the therapeutic effect of anti-estrogen drug toremifene by combining it with biguanide, metformin, on the HER2-positive breast cancer model in FVB/N HER-2/neu transgenic mouse. Male FBV/N mice with intramuscularly transplanted HER2-positive mammary gland tumor from a female mouse of the same strain have been given toremifene (30 mg/kg, orally daily) or metformin (100 mg/kg, orally daily) that had a moderate antitumor effect (decrease the area under the kinetic curve of tumor growth by 1.6 and 1.5 times, respectively, when compared with intact control). Co-administration of these drugs in the same doses had a more pronounced effect (the area under the kinetic curve of tumor growth decreased by 3.1 times compared to intact control; p<0.05). After 10 days, in group receiving toremifene all 10 mice developed inguinal-scrotal hernias, and in group that received toremifene plus metformin - only 5 of 10 (p=0.0325). By the 15

Topics: Animals; Antineoplastic Agents; Breast Neoplasms; Breast Neoplasms, Male; Disease Models, Animal; Female; Male; Metformin; Mice; Mice, Transgenic; Receptor, ErbB-2; Toremifene

Male breast cancer (MBC) in China usually has been studied retrospectively with small sample size, and studies analyzing the prognostic factors are rare. This study was to investigate the prognostic factors of Chinese patients with MBC based on the data from a single institute with a relatively large sample.. Clinical data of 72 patients with histopathologically confirmed MBC who received treatment at Sun Yat-sen University Cancer Center between January 1969 and March 2009, were collected. Kaplan-Meier, log-rank test and Cox regression model were used for statistical analysis.. The 5-year overall survival rate was 72.4%, and the survival rates for stage I, II, III, and IV were 100%, 74.2%, 57.2%, and 0%, respectively. Univariate analysis showed that the tumor size (P < 0.001), axillary lymph node status (P = 0.001), TNM stage (P = 0.001), operation model (with vs. without: P < 0.001; classic radical resection vs. modified radical resection, P = 0.336) and endocrine therapy(P = 0.02) significantly influenced the survival. Multivariate Cox regression showed that TNM stage (P = 0.035), operation model (P = 0.021) and endocrine therapy (P = 0.019) were independent prognostic factors for MBC.. Early diagnosis and comprehensive treatment strategy consisting of surgery and endocrine treatment is essential to improve the survival of the patients with MBC, and TNM stage, operation and endocrine treatment are the significant prognostic factors for MBC.

Topics: Adult; Aged; Aged, 80 and over; Antineoplastic Agents, Hormonal; Bone Neoplasms; Breast Neoplasms, Male; Carcinoma, Ductal, Breast; Carcinoma, Intraductal, Noninfiltrating; Carcinoma, Lobular; Chemotherapy, Adjuvant; Follow-Up Studies; Humans; Lymphatic Metastasis; Male; Mastectomy; Middle Aged; Neoplasm Recurrence, Local; Neoplasm Staging; Proportional Hazards Models; Radiotherapy, Adjuvant; Retrospective Studies; Survival Rate; Tamoxifen; Toremifene; Tumor Burden

Female breast cancer is one of the major causes of death among women while male breast cancer is relatively uncommon and accounts for about 1% of all breast cancers in both sexes. Influencing factors are: gynecomasty, familiarity for male breast cancer, Jewish and African-American male population. From the histological point of view, it is not different from the female breast cancer, except for the infiltrant ductal carcinoma, but with a much severe prognosis. Breast cancer metastases to the jaws are rare, only 1%; the most common sites of metastases are: lungs(59-69%), liver (58-65%), bone (44-71%), pleura (23-37%), brain (9-22%) and kidney (4-17%). At present, based on a literature research (May 2006), there have been just two other case reports of male breast cancer metastasis to the maxillofacial region, both to the mandible. The case of a 69-year-old white man who in 2001 underwent a radical mastectomy due to ductal breast cancer is reported. In 2005 the patient was referred to our department by his oncologist for multiple oral fistula. A mandibular TC revealed osteolytic lesions and the patient underwent mandibular surgery to remove the lesions and clean up the area. The histological examination was consistent with that of a metastatic deposit of adenocarcinoma of the breast. In June 2006 the patient died due to worsening of the general clinical conditions, in particular due to ascites and hepatic insufficiency.

Topics: Aged; Androstadienes; Antimetabolites, Antineoplastic; Antineoplastic Agents, Hormonal; Antineoplastic Combined Chemotherapy Protocols; Bone Density Conservation Agents; Bone Neoplasms; Brain Neoplasms; Breast Neoplasms, Male; Carcinoma, Ductal, Breast; Cortisone; Cyclophosphamide; Diphosphonates; Docetaxel; Fatal Outcome; Fluorouracil; Furosemide; Humans; Imidazoles; Liver Neoplasms; Male; Mandibular Neoplasms; Mastectomy, Modified Radical; Methotrexate; Omeprazole; Osteolysis; Phenobarbital; Taxoids; Toremifene; Vinblastine; Vinorelbine; Zoledronic Acid