Axillary node dissection in breast cancer.
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Biomedical subjects
Publications and source records attributed to J L Hayward.
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A consecutive series of 197 women under 70 years of age with operable breast cancer, randomised to treatment by a conservation technique in comparison to mastectomy, were assessed using structured interviews. The prevalence of cases of anxiety and depression was high before treatment commenced, there were fewer cases in the conservation group but no significant difference at 3 or 12 months in the number of new cases, social adjustment, or capacity to return to work. Attitudes to treatment showed significant differences between the groups, more women in the conservation group were able to wear their usual clothes and most women rated the cosmetic result highly. Patients were more likely to stop sexual intercourse completely after mastectomy. An effective conservation technique should be an attractive treatment choice available to selected women with early breast cancer.
Between 1968 and 1976 a total of 5162 women volunteers were enrolled into a prospective study conducted on the Island of Guernsey. Up to February 1990 145 women subsequently developed breast cancer. Blood samples were taken at the time of enrollment and prolactin levels were known for 85% of the volunteers. In calculating the relationship between blood prolactin levels and subsequent breast cancer risk, women were excluded if they had a hysterectomy or an oophorectomy or had cancer at any site before enrollment. The final analysis was based on 2596 premenopausal and 1180 naturally postmenopausal women and, of these respectively, there were 71 and 40 volunteers who subsequently developed breast cancer. The total follow-up for these two groups was 49,941 and 22,360 woman-years, respectively. In assessing the relationship between blood prolactin levels and risk of subsequent breast cancer the cohort was divided into quintiles according to prolactin concentration and relative risks (RR) were estimated. In calculating these values possible confounding by age at entry, age at menarche, parity, age at first birth, years since menopause, body build, history of benign breast disease and family history of breast cancer were taken into consideration. There was no significant relation between risk of breast cancer and prolactin in either pre- or postmenopausal women. Hence prolactin appears not to be an important determinant of breast cancer risk.
The epidemiological characteristics of normal women and women with early breast cancer in Great Britain were prospectively compared with similar subjects from Japan. The study consisted of 204 women with early breast cancer and 792 normal controls from Great Britain and 200 breast cancers and 335 Japanese controls. The risk factors examined were age, height and weight, menopausal status, age at menarche and menopause, parity, age at first birth, use of oral contraceptives, and family history of breast cancer. The cancers and cases were divided into pre- and postmenopausal groups. There was a striking trend for a protective effect of multiparity in both countries and a weak but inconstant protective effect of age at first birth. In premenopausal British women increase in body mass was significantly associated with a decreased risk of breast cancer but this association was not found for postmenopausal women or in the Japanese women. The results showed that the classical risk factors did not fully account for the differences in breast cancer risk between Great Britain and Japan. The possibility that aetiological factors might be changing warrants investigation.
In a cross-sectional study, serum estradiol (E2) and sex hormone-binding globulin (SHBG) concentrations were not significantly related to age at menarche in premenopausal British women in the luteal or follicular phases of the cycle. In Japanese subjects in the luteal phase, a marginally higher concentration of E2 was observed in those who had undergone an early rather than a late menarche. In British women, previous oral contraceptive users had significantly lower luteal phase E2 concentrations than never users.
A prospective study of comparable Japanese and British breast cancer patients treated by radical mastectomy confirmed previously reported findings that sinus histiocytosis and germinal center hyperplasia are more frequently seen in axillary lymph nodes from Japanese than in those from British patients. In Japanese, but not British, cases of either of these two morphologic findings had favorable prognostic significance for recurrence. Sinus histiocytosis also had favorable prognostic significance in Japanese cases for five year survival. In a separate review of axillary nodes from Japanese autopsy cases sinus histiocytosis was absent, suggesting that this finding in Japanese breast cancer cases was related to presence of the disease.
Normal premenopausal Japanese women have significantly more favourable mammographic parenchymal patterns (Wolfe Grades) than comparable British women. This finding is unaffected when the women are stratified by age, Quetelet's Index, age at menarche, age at first birth, and parity.
A comparative study was undertaken at Guy's Hospital in the UK and the Aichi Cancer Center in Japan of the clinical picture of breast cancer in the UK and Japan. Target patients were 221 UK and 200 Japanese primary operable patients who were recruited from April 1979 through August 1980. No difference was seen between the two countries in the side and site of the lesion and the size of the lesion. The localized tenderness of the tumor site was higher in Japanese patients than in UK patients (25.5% vs 0%). Difference was observed in tumor characteristics: breast cancers of the UK patients were irregular, ill-defined, and not so mobile, whereas those of the Japanese patients were round or oval, well-defined, and mobile. Skin fixation was higher in Japanese patients (71.0% vs 44.8%). Clinical node involvement was higher in UK patients (32.5% vs 19.0%).
A prospective study was undertaken to compare the recurrent sites of breast cancer patients in Japan and the UK. The number of patients collected between April 1979 and August 1980 were 205 in the UK and 199 in Japan, of which those who had recurrence were 89 and 49 respectively. A comparison of the distribution of the first recurrence sites demonstrated that the Japanese patients had significantly higher rates of local recurrence in the supraclavicular fossa and distant metastasis to the lung than UK patients. When comparing the distribution of all recurrent sites seen in the study, Japanese patients showed a significantly higher incidence of metastasis to the supraclavicular fossa and the lung while the UK patients showed a significantly higher incidence of skin metastasis. Bone metastases were observed more often in Japanese patients and liver metastases in UK patients, but neither of the differences were statistically significant.
The biology of breast cancer in Japan appears to be changing in that, while post-menopausal Japanese patients have a better prognosis than comparable British women, no differences in recurrence or survival rates can now be found in pre-menopausal patients.
In a prospective study conducted on the island of Guernsey a cohort of 5162 ostensibly healthy women was enrolled between 1967 and 1976. Blood samples were drawn from each participant, who also completed a questionnaire, which provided information on established risk indicators in human mammary carcinogenesis. Plasma selenium levels were measured in 46 breast cancer cases diagnosed a mean of 11 (S.D. 4) years after entry into the study cohort and in an age-stratified sample of 138 women drawn from the study base. Plasma selenium level in the cases was 109 (28) micrograms/l and in the base sample 103 (22) micrograms/l (95% confidence interval for the overall difference, -2 to 14 micrograms/l). The adjusted relative risk of developing breast cancer in the different quartiles of the selenium distribution was 0.80, 0.79, 0.72 and 1.00, respectively. Thus, in the present study selenium was not a strong indicator of human breast cancer risk.
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A prospective study has been conducted on 4954 female volunteers from the Island of Guernsey between 1977 and 1985 to examine risk factors for breast cancer and their relationship to mammographic parenchymal patterns as assessed by Wolfe's method of grading. Up to September 1988, 69 women had developed breast cancer, 11 of whom were prevalent cases being diagnosed within six months of mammography. The remaining incident cases were diagnosed six to 126 months (median 65 months) after entry to the study. Univariate analysis showed that the distribution of Wolfe grades in the population was significantly associated with menopausal status, age, parity, adiposity, age at menarche, age at first childbirth and use of oral contraception, but not with a family history of breast cancer. Multivariate analysis of the data for these variables from either pre- and/or post-menopausal women indicated that age, parity and adiposity were significantly related to Wolfe grade pattern. Age had an opposite effect in pre- compared with postmenopausal women thus the probability of either a P2 or DY pattern increased with increasing age in premenopausal but decreased in postmenopausal women so that incidence peaked around the menopause. Other variables did not achieve significance in the multivariate analysis. Odds ratios (ORs) were calculated for women with P2 or DY patterns using those with N1 or P1 grades as the reference group. The ORs were determined at two censoring times; one at five years and the other to include the most recent follow-up of this cohort. The ORs were adjusted for years of follow-up, age and adiposity and in postmenopausal women adjustment was also made for age at menarche.(ABSTRACT TRUNCATED AT 250 WORDS)
399 patients with early breast cancer were randomly allocated to treatment by either modified radical mastectomy or lumpectomy and radiotherapy. 169 had histologically involved axillary nodes and were randomised to receive either adjuvant cytotoxic chemotherapy (76 patients) or no systemic adjuvant treatment (93 patients). Chemotherapy comprised a combination of oral cyclophosphamide and intravenous methotrexate and 5-fluorouracil (CMF) for 12 cycles over one year. Patients in the mastectomy group received a significantly higher percentage of the planned chemotherapy dose compared with those in the radiotherapy group (median 85% v. 71% p less than 0.05). Patients treated with radiotherapy were more frequently nauseated and developed more severe alopecia, but these differences were not statistically significant. At median follow-up of 37 months the relapse-rate and pattern of relapse were similar in both groups of patients receiving CMF.
Patients with locally advanced carcinoma of the breast were randomized to receive either radiotherapy alone, radiotherapy + endocrine therapy, radiotherapy + chemotherapy or radiotherapy + endocrine therapy + chemotherapy. In 363 evaluable patients, time to first progression was delayed significantly by both endocrine treatment and chemotherapy, the greatest effect being achieved by the combination of endocrine treatment and chemotherapy. This effect was almost entirely due to a major effect of systemic treatment on time to loco-regional progression, for which the result is highly significant, rather than time to distant metastasis in which only a non-significant trend was observed. For survival, a trend was seen in favour of the combination of hormone treatment and chemotherapy, but this effect did not achieve statistical significance. This trial suggests that current endocrine and cytotoxic treatments are only of marginal value in improving the prognosis in locally advanced breast cancer.
A new lump in the breast following conservation treatment for early breast cancer may represent a recurrence of the disease or may be a benign lesion. Clinical evaluation of these lumps is often extremely difficult and, potentially, mammography would seem to be of great importance in the assessment. Between November 1981 and March 1986, 214 patients with operable breast cancers of 4 cm or less in diameter underwent conservative treatment. The conservation technique comprised synchronous excision of the primary tumour without a wide margin, axillary clearance, interstitial irradiation with iridium 192 (2000 cGy), and subsequent external beam radiotherapy to the breast (4600 cGy). After an average follow-up of 26 months, 17 patients developed a new lump in the treated breast necessitating further biopsy. Seven of these were malignant and 10 benign. In the latter category the most frequent finding was fat necrosis. Clinically, the lesions were indistinguishable from each other. The mammographic signs, which best predicted malignancy, were either of a mass or of a malignant type of microcalcification. This study illustrates the problems associated with deciding the nature of a new lump in the breast following conservation treatment. Mammography is complementary to physical examination, and a base-line mammogram six months after completion of therapy is helpful. Despite the use of mammography, biopsy is the only definitive way of excluding recurrence.
In each of two population-based studies conducted on the Island of Guernsey between 1967-1976 and 1977-1984, respectively, single specimens of blood were taken from over 5000 normal women. From these two studies there were 1173 and 946 postmenopausal women in whom blood prolactin was determined and multivariate analysis was used to establish the association between blood prolactin concentration and possible determinants of risk of breast cancer. Since prolactin levels were log-normally distributed these analyses were done on log-transformed data. The age at menarche or menopause, age at first or last childbirth, length of reproductive life (i.e. time from menarche to menopause) or post-menopausal life (i.e. time from menopause to time of blood sampling), contraceptive use and history of breast cancer were not significantly associated with blood prolactin concentration. Of significance were age, parity, time of blood sampling and assay drift. Ponderosity (Quetelet's Index) was positively associated with prolactin concentration and this was significant using a one-tail criterion. Women with a mammographic pattern designated DY by Wolfe had significantly higher prolactin levels than those with N1 patterns. However, the main finding to emerge was that after standardizing for all the other variables increasing parity was related to a step-wise reduction in blood prolactin levels. Since this had occurred in women who had had their last child up to 35 years previously it implies this effect is permanent. It could therefore be that the protective effect on breast cancer risk of multiparity and early first pregnancy could be mediated by such a life-long reduction in blood prolactin levels.
A conservation technique has been developed for the treatment of early breast cancer which involved removal of the tumor, axillary clearance, tumor site implantation with Iridium-192 wires for a boost dose and subsequent treatment of the breast with radical megavoltage external beam therapy. Although the cosmetic results were satisfactory in the majority of the patients, for some it was rated as fair or poor. One variable factor which could have carried some morbidity was the dose of radiation received by the skin. In 51 patients, doses were measured at several points over the treated breast using Thermoluminescent Dosimetry (TLD) at the time of the iridium implant and during the subsequent external beam therapy. Development of skin pigmentation, oedema, and fibrosis were unrelated to the dose received by the skin but the findings suggested that doses greater than 50 Gy to the skin increased the possibility of late (greater than 24 months) telangiectasia over the boosted area. Treatment of tumors in the lower half of the breast, or in large breasts, was associated with a higher incidence of poor cosmesis. This may have been the result of varying posture on the interstitial dose distribution from the Iridium-192 wires and comparison of dose distribution in both supine and erect positions was carried out.