Publications by authors named "Dudley Sinnett"

A case of ductal carcinoma in-situ (DCIS) associated with prolactinoma in a male patient is described. A 56-year-old gentleman presented with lethargy and loss of libido. His prolactin at presentation was 3680 mU/l and an MRI scan of the head revealed a pituitary tumour suggestive of prolactinoma.

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Purpose: Novel radiotracers could potentially allow the identification of clinically aggressive tumor phenotypes. As choline metabolism increases during malignant transformation and progression of human mammary epithelial cells, we examined the ability of [(11)C]choline (CHO) positron emission tomography imaging to detect clinically aggressive phenotype in patients with estrogen receptor (ER)-positive breast cancer in vivo.

Experimental Design: CHO positron emission tomography was done in 32 individuals with primary or metastatic ER-positive breast cancer.

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Background: Sentinel lymph node biopsy in women with operable breast cancer is routinely used in some countries for staging the axilla despite limited data from randomized trials on morbidity and mortality outcomes. We conducted a multicenter randomized trial to compare quality-of-life outcomes between patients with clinically node-negative invasive breast cancer who received sentinel lymph node biopsy and patients who received standard axillary treatment.

Methods: The primary outcome measures were arm and shoulder morbidity and quality of life.

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Objective: To review the mammographic and ultrasound appearances in patients who have invasive ductal carcinoma with a central acellular zone (ring carcinoma), as this feature has been reported to be associated with a poorer outcome.

Materials: Eight patients were identified with ring carcinomas. Two breast radiologists reviewed their mammograms and ultrasound images.

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Background: Some oestrogen-receptor (ER) positive breast cancers express epidermal growth factor receptor (EGFR), but whether inhibition of EGFR can suppress proliferation of breast cancer cells and ER function is not known.

Methods: In a double-blind, placebo-controlled randomised trial of 56 postmenopausal patients with ER-positive and EGFR-positive primary breast cancer, 27 women were randomly assigned to the tyrosine-kinase inhibitor of EGFR gefitinib (250 mg given orally once a day) and the aromatase inhibitor anastrozole (1 mg given orally once a day), and 29 women to gefitinib (250 mg given orally once a day) and placebo of identical appearance to anastrozole given orally once a day, all given for 4-6 weeks before surgery. Primary outcome was inhibition of tumour-cell proliferation, as measured by Ki67 antigen labelling index.

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We have previously developed a quantitative PCR (QPCR) technique for the detection of cytokeratin 19 (CK19) transcripts in blood and bone marrow and compared this to immunocytochemistry (ICC). Together, both have shown promise for monitoring therapeutic efficacy in patients with metastatic breast cancer. The aim of this study was to determine the feasibility and value of these assays for minimal residual disease (MRD) in monitoring efficacy of adjuvant therapy following surgery for primary breast cancer.

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Two recently seen patients presenting with large breast lumps that proved to be pure mesenchymal tumors arising from the underlying chest wall are presented. One tumor proved to be a giant cell tumor of soft tissue and the other an osteogenic sarcoma. It is suggested that these two cases may not be unique and that some mesenchymal breast tumors might have their origin in the chest wall.

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This study was aimed at investigating the relationship between serum prolactin levels and the morphology of operable female breast lesions. One hundred fifty-three consecutive patients with operable benign and malignant breast lesions in whom preoperative serum prolactin levels had been determined were stratified into five groups according to their serum prolactin levels. The histologic findings in these groups were analyzed and compared.

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Unlabelled: Multidrug resistance (MDR) due to expression of a membrane-associated permeability glycoprotein (P-glycoprotein [Pgp]) prevents successful cytotoxic chemotherapy for breast cancer. Identification of MDR would facilitate selection of chemotherapy regimens and MDR modulators. This study aimed to evaluate (99m)Tc-sestamibi imaging for predicting overexpression of Pgp in primary breast cancer and to measure the efficacy of toremifene, the MDR modulator, in vivo.

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