Lobular breast cancers lack the inverse relationship between ER/PR status and cell growth rate characteristic of ductal cancers in two independent patient cohorts: implications for tumor biology and adjuvant therapy

BACKGROUND: Although invasive lobular carcinoma (ILC) of the breast differs from invasive ductal carcinoma (IDC) in numerous respects - including its genetics, clinical phenotype, metastatic pattern, and chemosensitivity - most experts continue to manage ILC and IDC identically in the adjuvant setting. Here we address this discrepancy by comparing early-stage ILC and IDC in two breast cancer patient cohorts of differing nationality and ethnicity. METHODS: The clinicopathologic features of 2029 consecutive breast cancer patients diagnosed in Hong Kong (HK) and Australia (AUS) were compared. Interrelationships between tumor histology and other clinicopathologic variables, including ER/PR and Ki67, were analysed. RESULTS: Two hundred thirty-nine patients were identified with ILC (11.8%) and 1790 patients with IDC. AUS patients were older (p 0.7). Moreover, whereas IDC tumors exhibited a strongly negative relationship between ER/PR and Ki67 status (p 0.6). CONCLUSION: These data imply that the primary adhesion defect in ILC underlies a secondary stromal-epithelial disconnect between hormonal signaling and tumor growth, suggesting in turn that this peritumoral feedback defect could reduce both the antimetastatic (adjuvant) and tumorilytic (palliative) efficacy of cytotoxic therapies for such tumors. Hence, we caution against assuming similar adjuvant chemotherapeutic survival benefits for ILC and IDC tumors with similar ER and Ki67, whether based on immunohistochemical or gene expression assays.published_or_final_versio

Role of fine-needle aspiration cytology and core biopsy in the preoperative diagnosis of screen-detected breast carcinoma

Core biopsy (CB) has now largely replaced fine-needle aspiration cytology (FNAC) in the preoperative assessment of breast cancer in the UK. We studied the contribution of FNAC and CB in the preoperative diagnosis of screen-detected breast carcinoma. Data were prospectively collected on 150 840 women who underwent breast screening over a 4-year period from 1999 to 2003. Data on women who had both FNAC and CB taken from the same lesion preoperatively and in whom surgical excision of the lesion subsequently confirmed malignancy was analysed. In 763 cancers, FNAC was inadequate (C1) in 8% and benign (C2) in 10%. Most of these cases presented with microcalcification (25% were C1 or C2). Core biopsy was not representative (B1) or benign (B2) in 7%. The absolute and complete sensitivities were 65 and 82% for FNAC and 80 and 93% for CB in the diagnosis of cancer. Core biopsy was abnormal (B3 or above) in 86% of the cancers missed by FNAC and FNAC was abnormal (C3 or above) in 65% of those missed by CB. Core biopsy is better than FNAC at preoperative diagnosis of screen-detected breast cancer as it missed fewer cancers. However, combining FNAC resulted in a better preoperative diagnosis rate

Bilateral amyloid tumours of the breast

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Multidisciplinary approach to the management of breast cancer in Hong Kong

Introduction: Treatment of breast cancer has become more complex and sophisticated in recent years, and a multidisciplinary team approach to management is now recommended worldwide. The present study reviews the applicability of the multidisciplinary approach to the management of patients with breast cancer in a private hospital. Methods: Between September 2003 and April 2005, a total of 579 consecutive patients undergoing breast cancer surgery were studied. Patients receiving neoadjuvant chemotherapy or who had metastatic disease at presentation were excluded. Demographic and operative details, pathology, and recommended adjuvant therapy were discussed in the weekly multidisciplinary breast conference involving breast surgeons, pathologists, and radiation and medical oncologists. Results: The mean age was 48.6 years. A self-discovered breast lump (80%) was the most common presentation, whereas screening mammography accounted for only 12.2%. The accuracy of preoperative mammography, ultrasonography, fine-needle aspiration cytology, and core biopsy were 66.5%, 80.7%, 89.4%, and 98.9%, respectively. Mastectomy was performed in 49.3% of patients, of whom 22.0% underwent immediate reconstruction. Eighty-five percent of patients underwent concomitant axillary surgery, comprising either sentinel node biopsy (49.9%), sentinel node biopsy followed by axillary dissection (38.7%), or axillary dissection alone (11.4%). The mean size of invasive tumors was 2.3 cm, and lymph node metastases were detected in 40% of patients; stage 0, I, II, and III disease was present in 14.2%, 34%, 44.5%, and 7.2% of patients, respectively. Adjuvant hormonal therapy, chemotherapy and radiotherapy were recommended in 62.4%, 51.2%, and 64.9% of patients, respectively. Conclusions: Breast cancer in Hong Kong most often presents as a breast lump discovered by self-examination. The role of screening mammogram has to be reevaluated. Multidisciplinary teamwork is essential for optimizing decision-making about adjuvant treatment interventions in such patients. © 2006 Société Internationale de Chirurgie.link_to_subscribed_fulltex

Cholestin inhibits cholesterol synthesis and secretion in human hepatic cells (HepG2)

Conference Theme: Intersection and Integratio

Cholestin inhibits cholesterol synthesis and secretion in hepatic cells (HepG2)

Hyperlipidemia is a well-known risk factor for atherosclerosis and statins are widely used to treat patients with elevated levels of lipids in their plasma. Notwithstanding the proven benefits of statin drugs on both primary and secondary prevention of heart disease, the high cost of statin treatment, in addition to possible side effects such as liver function abnormalities, may limit their widespread use. We conducted a study on a natural product as an alternative to statin treatment. Cholestin, a dietary supplement, is prepared from rice fermented with red yeast (Monascus purpureus), which has been shown to significantly decrease total cholesterol levels in hyperlipidemic subjects. Our objective was to determine the cellular effect of Cholestin on cholesterol synthesis in human hepatic cells (HepG2) and the mechanism by which it caused a change in lipid metabolism. Cholestin had a direct inhibitory effect on HMG-CoA reductase activity (78-69% of control). Cholesterol levels in HepG2 cells treated with Cholestin (25-100 μg/mL) were significantly reduced in a dose-dependent manner (81-45% of control, respectively). This reduction was associated with decreased synthesis and secretion of both unesterified cholesterol (54-31 and 33-14% of control, respectively) and cholesteryl ester (18-6 and 37-19% of control, respectively). These results indicate that one of the anti-hyperlipidemic actions of Cholestin is a consequence of an inhibitory effect on cholesterol biosynthesis in hepatic cells and provide the first documentation of a biomolecular action of red yeast rice.link_to_subscribed_fulltex