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B Ejlertsen

Publications and source records attributed to B Ejlertsen.

At least 19 recordsLinked to original sources

Combined epirubicin and vinorelbine as first-line therapy in metastatic breast cancer: a pilot study performed by the Danish Breast Cancer Cooperative Group.

This pilot study investigated the tolerability and efficacy of increasing doses of epirubicin and vinorelbine as first-line chemotherapy for metastatic breast cancer. Acute toxicity was manageable at all dose levels for combinations of epirubicin 60-90 mg/m2 on day 1 and vinorelbine 15-25 mg/m2 on days 1 and 8 repeated every 3 weeks. Myelotoxicity was the most frequent toxic event, with a significant increase in grade 4 leukopenia from 0% at dose level 1 (60+15 mg/m2) to 26% at dose level 6 (90+25 mg/m2). Signs of acute or chronic cardiotoxicity grades 2-4 were seen in 15% of the patients and included arrhythmia and decreased function. No significant association was established between dose and nonhematological toxicity. Objective responses were observed in 49 of the 99 evaluable patients (49.5%, 95% CI 39.9-59.2), 18 being complete and 31 partial responses. Responses were observed at all six dose levels. In conclusion, acute toxicity was manageable at all dose levels for combinations of epirubicin 60-90 mg/m2 on day 1 and vinorelbine 15-25 mg/m2 on days 1 and 8. In the treatment of advanced breast cancer, improvement of the antitumor efficacy by the addition of vinorelbine to epirubicin remains to be demonstrated in a randomized phase III trial.

Adult↗

BRCA1 and BRCA2 mutation status and cancer family history of Danish women affected with multifocal or bilateral breast cancer at a young age.

INTRODUCTION: A small fraction of breast cancer is the result of germline mutations in the BRCA1 and BRCA2 cancer susceptibility genes. Mutation carriers frequently have a positive family history of breast and ovarian cancer, are often diagnosed at a young age, and may have a higher incidence of double or multiple primary breast tumours than breast cancer patients in general. OBJECTIVES: To estimate the prevalence and spectrum of BRCA1 and BRCA2 mutations in young Danish patients affected with bilateral or multifocal breast cancer and to determine the relationship of mutation status to family history of cancer. SUBJECTS: From the files of the Danish Breast Cancer Cooperative Group (DBCG), we selected 119 breast cancer patients diagnosed before the age of 46 years with either bilateral (n=59) or multifocal (n=61) disease. METHODS: DNA from the subjects was screened for BRCA1 and BRCA2 mutations using single strand conformation analysis (SSCA) and the protein truncation test (PTT). Observed and expected cancer incidence in first degree relatives of the patients was estimated using data from the Danish Cancer Registry. RESULTS: Twenty four mutation carriers were identified (20%), of whom 13 had a BRCA1 mutation and 11 carried a BRCA2 mutation. Two mutations in BRCA1 were found repeatedly in the material and accounted for seven of the 24 (29%) mutation carriers. The mutation frequency was about equal in patients with bilateral (22%) and multifocal breast cancer (18%). The incidence of breast and ovarian cancer was greatly increased in first degree relatives of BRCA1 and BRCA2 mutation carriers, but to a much lesser degree in relatives of non-carriers. An increased risk of cancer was also noted in brothers of non-carriers. CONCLUSIONS: A relatively broad spectrum of germline mutations was observed in BRCA1 and BRCA2 and most of the mutations are present in other populations. Our results indicate that a diagnosis of bilateral and multifocal breast cancer is predictive of BRCA1 and BRCA2 mutation status, particularly when combined with information on the patients' age at diagnosis and family history of breast/ovarian cancer.

Adult↗

Tamoxifen in high-risk premenopausal women with primary breast cancer receiving adjuvant chemotherapy. Report from the Danish Breast Cancer co-operative Group DBCG 82B Trial.

Following modified radical mastectomy, pre- and perimenopausal (amenorrhoea for < 5 years) patients with stage II or III breast cancer received CMF (cyclophosphamide 600, methotrexate 40, 5-fluorouracil 600 mg/m2 intravenously (i.v.) every 4 weeks, 9 cycles). The effect on recurrence-free survival (RFS) and overall survival (OS) of the addition of adjuvant tamoxifen (TAM) to adjuvant chemotherapy was examined by randomisation either to no additional treatment (n = 314), or concurrently TAM 30 mg daily for 1 year (n = 320). 40% had positive, 12% negative and 48% unknown receptor status. One year after surgery 21% versus 35% (CMF + TAM versus CMF) were still menstruating (P < 0.01). With a median follow-up of 12.2 years there was no difference in RFS (10-year RFS 34% versus 35%, P = 0.81) or OS (45% versus 46%, P = 0.73). In a Cox proportional hazards model, tumour size, number of metastatic lymph nodes, frequency of metastatic nodes in relation to total number of nodes removed, degree of anaplasia, age, and menostasia within the first year after operation were significant independent prognostic factors for RFS, and the same factors except age for OS. No significant interactions with TAM were seen. Thus, in this group of pre- and perimenopausal high-risk early breast cancer patients with heterogeneous receptor status given CMF i.v., concurrent TAM for 1 year did not improve the outcome. These results do not exclude that receptor positive patients may benefit from adjuvant TAM for longer periods given sequentially to chemotherapy.

Adult↗

Oral clodronate in breast cancer patients with bone metastases: a randomized study.

OBJECTIVES: To investigate the effect of the bisphosphonate clodronate on the occurrence of skeletal events (hypercalcaemia, fractures and radiotherapy) in breast cancer patients with bone metastases. DESIGN: Prospective, randomized, controlled, clinical trial. SETTING: A department of oncology in a university hospital. SUBJECTS: One hundred patients who received firstline systemic antineoplastic treatment for metastatic breast cancer with bone involvement were randomized to receive clodronate as two 400 mg capsules twice a day for 2 years or no additional therapy. RESULTS: In the clodronate group the number of skeletal events was reduced to 14 events in 48 evaluable patients as compared with 21 events in 51 evaluable control patients. The time to the first skeletal event was significantly longer in the clodronate group than in the control group (P = 0.015) and the most distinct difference was a lower occurrence of fractures in the clodronate group (P = 0.023). After 15 months the effect of clodronate tended to decline as the need for radiotherapy increased in the clodronate group compared with the control group (P = 0.069). Significant improvements in several quality-of-life aspects were seen in both groups during the first 6 months, but there was no significant difference between the groups. No effect was observed on time to radiologically evaluated disease progression in bone or on survival. The most frequent side-effects resulting in discontinuation of clodronate were nausea and diarrhoea. CONCLUSION: Oral clodronate is associated with a temporary reduction of morbidity related to bone metastases in breast cancer patients.

Adult↗

Survival in breast cancer patients after the first episode of hypercalcaemia.

OBJECTIVES: To investigate hypercalcaemia (serum ionized calcium (S-Ca2+) > 1.35 mmol L(-1)) in breast cancer patients before and after the introduction of bisphosphonates and the effect of disease- and treatment-related factors on survival. DESIGN: Prospective and retrospective registration of covariates. SETTING: A department of oncology in a university hospital. SUBJECTS: A consecutive cohort of 212 hypercalcaemic patients never treated with bisphosphonate was identified prospectively (period 1) and 193 patients with metastases were classified into three groups: mild (S-Ca2+ < 1.48: n=102). moderate (1.48 < or = S-Ca2+ < or = 1.60; n=41). and severe hypercalcaemia (S-Ca2+ > 1.60 mmol L(-1); n=50). Fifty-one patients with severe hypercalcaemia all treated with bisphosphonate except one were identified retrospectively (period 2). RESULTS: For period 1 median survival was 6.7 months. Survival was significantly decreased in the two groups with the highest initial S-Ca2+ (P < 0.0001). Median survival times in severely hypercalcaemic patients from periods 1 and 2 were 1.4 (9 5(% confidence interval 0.8-2.1) and 2.2 (95% confidence interval 1.3-3.1) months, respectively. In a Cox model for period 1 significant covariates were: WHO performance, extent of metastases, whether systemic anticancer treatment could be given, and haemoglobin, but not S-Ca2+. CONCLUSION: Prognosis is poor in hypercalcaemic breast cancer patients with WHO performance 3-4 and advanced metastatic disease when effective systemic treatment can no longer be offered. Bisphosphonate treatment does not seem to improve survival in severe hypercalcaemia. Antihypercalcaemic treatment of mild malignancy-associated hypercalcaemia appears not to be vital. Therapeutic efforts should be aiming at patients with moderate hypercalcaemia.

Breast Neoplasms↗

Molecular cytogenetic analysis of a nontumorigenic human breast epithelial cell line that eventually turns tumorigenic: validation of an analytical approach combining karyotyping, comparative genomic hybridization, chromosome painting, and single-locus fluorescence in situ hybridization.

The immortalized, nontumorigenic human breast epithelial cell line HMT-3522 has been used as a model for premalignant and, eventually, malignant development. During cultivation, the karyotype evolution was followed. At an early stage, a very long constant phase showed a near-diploid karyotype, with only five marker chromosomes. DNA from this phase was used for comparative genomic hybridization (CGH) analysis, confirming a previously known MYC amplification, and the integration sites were subsequently determined by single-locus fluorescence in situ hybridization (FISH). Furthermore, gains of 5q22-qter and 20q11-qter and deletion of most of chromosome 6 (6p23-qter) were detected by CGH. Because of uncertainty about some of the indicated changes, including a deletion of Ip35-pter, the CGH findings were investigated more closely by chromosome painting, leading to a revision of the karyotype: 45,XX,del(I)(p35),-6,dup(8)(pter-->qter::qter-->q24),der(12) t(6;12)(p23; p13),der(14)t(5;14)(q22;q32.3),der(17)t(8;17;20)(17pter-->17q25 ::8qter--> 8q23::8q24-->8qter::8q24-->8qter:: 8q23-->8q24.1::20q11-->20qter). Some karyotypic changes were confirmed by CGH; others had to be revised; and, in the Ip35 region, classical cytogenetics seems superior to CGH. However, CGH revealed a karyotypically unsuspected dup(20q) that might be of special relevance to breast tumor initiation or progression. Our study confirms that CGH is supplementary to current technologies, e.g., karyotyping and Southern analysis, but cannot replace them. In addition, our cell line turned out to be an excellent model for comparison among the different methods. The results imply that future cytogenetic analyses of complex karyotypes should be based on a combination of karyotyping, CGH, and FISH.

Breast↗

Femoral fractures in postmenopausal breast cancer patients treated with adjuvant tamoxifen.

The anti-estrogen tamoxifen is the prevalent endocrine treatment in postmenopausal breast cancer patients. However, nothing is known about the long-term effects of the drug on the skeleton as assessed by the occurrence of fractures. We investigated the occurrence of fractures of the femur in patients from a Danish Breast Cancer Cooperative Group (DBCG) trial initiated in 1977 by a linkage of data from the Danish National Registry of Patients with data from the DBCG registry. 1716 postmenopausal women with high-risk breast cancer were randomized to local radiotherapy with or without tamoxifen, 30 mg daily for 1 year. Fifty-one patients in the control group had one femoral fracture and 64 tamoxifen treated patients had one femoral fracture. Eleven patients in the control group had one trochanteric fracture compared to 27 patients in the tamoxifen group (logrank = 5.28. P = 0.022; hazard ratio = 2.12, 95% CL 1.12, 4.01). The results could not be explained by a longer survival in the tamoxifen group nor by bone metastases with pathological fractures. In conclusion, our study suggests that tamoxifen does not seem to offer protection against fractures in old age and may even increase the risk of fractures at particular sites. This hypothesis needs to be disproved or confirmed in other trials.

Aged↗

Treatment of metastatic breast cancer with paclitaxel and doxorubicin.

The activity of single-agent paclitaxel (Taxol; Bristol-Myers Squibb Company, Princeton, NJ) against untreated and previously treated metastatic breast cancer (documented in anthracycline-resistant disease and in extensively pretreated patients as well) has prompted investigations of the optimal doses and schedules of paclitaxel/doxorubicin combinations. With one exception, paclitaxel has been administered in either a 24- or a 3-hour infusion, while the administration times for doxorubicin vary from bolus injection to a 72-hour infusion. Results of these completed phase I and II trials are reviewed. Also reported are two ongoing European trials that have achieved promising preliminary results. In Milan, a phase I trial has achieved a preliminary response rate exceeding 90% in 30 chemotherapy-naive patients treated with an alternating schedule of paclitaxel over 3 hours and intravenous bolus doxorubicin. At doses of paclitaxel 200 mg/m2 and doxorubicin 60 mg/m2, the dose-limiting toxicity is leukopenia and mucositis. Furthermore, congestive heart failure has occurred in six patients. We are conducting a phase I/II study in minimally pretreated patients, with a 30-minute doxorubicin infusion preceding a 3-hour paclitaxel infusion every 3 weeks. Of 24 patients evaluable for response, five have achieved partial responses and three complete responses. (Another five partial and two complete responses need confirmation.) Of the two dose levels now given, all responses occurred at the higher paclitaxel/doxorubicin level, 175 and 60 mg/m2, respectively. Despite grades 3 and 4 neutropenia in 31% and 60% of courses, respectively, only six patients have been hospitalized for febrile neutropenia. Of concern, the left ventricular ejection fraction has decreased to below normal in six patients and two have developed symptomatic congestive heart failure. Whether lowering the peak doxorubicin concentration will preclude this effect, which has been observed only in the studies using short infusions of both drugs, is under investigation.

Antibiotics, Antineoplastic↗

Tamoxifen and bone metabolism in postmenopausal low-risk breast cancer patients: a randomized study.

PURPOSE: This trial was undertaken to evaluate the effect of adjuvant tamoxifen on bone metabolism in postmenopausal women undergoing surgery for low-risk breast cancer. PATIENTS AND METHODS: In an open trial, 25 women were randomized to receive tamoxifen 30 mg/d for 2 years, and 25 women constituted the control group. Twenty women treated with tamoxifen and 23 women in the control group provided data for the analysis. Inclusion criteria were operation for low-risk breast cancer and cessation of menstruations for more than 1 year. Exclusion criteria were presence of metastases, disorders of bone metabolism, contraindications against tamoxifen, use of drugs with influence on bone metabolism, ailments that made bone mineral measurements impossible, and age greater than 65 years. Repeated measurements of bone mineral density and content at the lumbar spine and forearms, serum alkaline phosphatase, phosphate, and ionized calcium were performed in all patients. RESULTS: Lumbar spine bone mineral density increased during the first year in women treated with tamoxifen and then stabilized, compared with decreased bone mineral density in the control group (P = .00074). Bone mineral content at the forearms remained almost stable in tamoxifen-treated women compared with a decrease in the control group (P = .024). Serum alkaline phosphatase, phosphate, and ionized calcium decreased in the tamoxifen group (P < .00001, P = .002, and P = .002, respectively). CONCLUSION: Tamoxifen has estrogen-like effects on bone metabolism that result in an increase and stabilization of bone mineral density in the axial skeleton and a stabilization of bone mineral content in the appendicular skeleton.

Absorptiometry, Photon↗

Decreased efficacy of cyclophosphamide, epirubicin and 5-fluorouracil in metastatic breast cancer when reducing treatment duration from 18 to 6 months.

The impact of treatment duration on survival and progression-free survival is uncertain in metastatic breast cancer. In this trial 359 patients were randomised to receive cyclophosphamide, epirubicin and 5-fluorouracil (CEF) once every 3 weeks for a maximum of 18 months or identical chemotherapy for a maximum of 6 months. Following progressive disease (PD) or severe toxicity CEF was discontinued before the scheduled maximum duration. A second series of CEF continued for a maximum of 12 months was offered to patients with PD more than 3 weeks after completing a maximum of 6 months of CEF. Both groups received tamoxifen (30 mg daily) until PD, and premenopausal patients also received ovarian irradiation. After 6 months 254 evaluable patients were unprogressive. Survival and progression-free survival were significantly longer in 127 patients continuing CEF than in 127 patients interrupting CEF at 6 months (chi 2 = 17.6, P = 0.00003 and chi 2 = 4.7, P = 0.03, respectively). The results of the second series of CEF were discouraging with only one complete response in 44 evaluable patients. In conclusion, prolonged chemotherapy for 18 months is superior to identical chemotherapy for 6 months in the treatment of metastatic breast cancer.

Antineoplastic Combined Chemotherapy Protocols↗

Prednisolone in the treatment of severe malignant hypercalcaemia in metastatic breast cancer: a randomized study.

To determine the effect of prednisolone on severe hypercalcaemia in women with metastatic breast cancer, 30 patients with serum ionized calcium above 1.60 mmol l-1 (reference range 1.15-1.35 mmol l-1) entered a randomized trial. Performance status before entry to the trial and survival time after hypercalcaemia were also noted. All patients received 4 l of isotonic saline daily and 80 mg intravenous furosemide three times daily for 2 d; thereafter they received 3 l of isotonic saline daily and 80 mg furosemide twice daily for 6 d. Fifteen patients were randomized to receive prednisolone, 25 mg orally, three times daily for 8 d. Serum ionized calcium decreased significantly in both groups, but most markedly in the prednisolone group. The median difference was 0.28 mmol l-1 (95% confidence interval (CI), 0.09-0.52) on day 4 and 0.21 mmol l-1 (95% CI, 0.12-0.44) on day 8. In seven prednisolone-treated patients serum ionized calcium normalized, compared to none in the control group (Fisher's exact test; P = 0.028). No severe adverse effects were observed. Prior to detection of hypercalcaemia all patients were severely immobilized, primarily due to bone pain. Only 10 patients were still living after 3 months. Prednisolone, furosemide and rehydration is superior to furosemide and rehydration alone in severely hypercalcaemic patients with metastatic breast cancer in whom immobilization appears to be an early warning sign of life-threatening hypercalcaemia. The short survival time was not influenced by prednisolone.

Administration, Oral↗

Pattern of spread and progression in relation to the characteristics of the primary tumour in human breast cancer.

Characteristics of primary breast tumours were related to the extent of dissemination, the anatomical location of metastases, and the rate of progression in 863 patients with recurrent breast cancer. The following features were examined: tumour laterality, location within the breast, size, invasion of skin or fascia, presence of residual cancer tissue (RCT) in the mastectomy specimen, and number of positive lymph nodes. Increasing tumour size, increasing number of nodes, and the presence of local invasion and RCT were all associated with a short duration of survival both from initial diagnosis and from first recurrence. None of the factors were related to either the extent of dissemination or the rate of progression. Patients who had their primary tumours located in the medial or central part of the breast had an increased incidence of mediastinal and pleural recurrences respectively. Primary tumours greater than 5 cm, invasion of skin or fascia, and presence of RCT were all associated with an increased incidence of local recurrences. In addition, both RCT and fascial invasion were associated with increased occurrence of brain metastases. Most differences were explainable on the basis of local and regional lymphodynamics. Since the status of the features examined here all vary with time from tumour inception, it is suggested that the impact on prognosis is related to variations in tumour age from inception to primary diagnosis rather than to qualitative biological differences.

Bone Neoplasms↗

Imipramine treatment in diabetic neuropathy: relief of subjective symptoms without changes in peripheral and autonomic nerve function.

The effect of imipramine on symptomatic peripheral diabetic neuropathy in 9 patients was examined in a double-blind cross-over study against placebo. The dose of imipramine was adjusted to yield optimal plasma levels of imipramine plus desipramine of 300-750 nM. Imipramine had a clear beneificial effect on the symptoms of the neuropathy, whereas no changes in a range of neurophysiological measurement was detected. Despite some adverse effects, especially of an anticholinergic nature, the patients generally preferred imipramine to placebo.

Adult↗

Peripheral nerve function during hyperglycemic clamping in insulin-dependent diabetic patients.

The influence of hyperglycemia on peripheral nerve function was studied in 9 patients with long-term insulin-dependent diabetes. Blood glucose concentration was raised 13.5 +/- 0.5 mmol/l (mean +/- SEM) within 15 min and kept approximately 15 mmol/l over basal level for 120 min by intravenous glucose infusion. Hyperglycemia was accompanied by increased plasma osmolality. Sensory and motor nerve conduction and distal motor latency in the ulnar nerve were determined before, immediately after induction of hyperglycemia, and again after 120 min hyperglycemia. Distal (5th finger - wrist) and proximal (wrist - elbow) sensory nerve conduction showed an insignificant increase as hyperglycemia was induced. During hyperglycemia mean distal sensory conduction decreased from 53.1 m/s to 50.4 m/s (P less than 0.05) and mean proximal sensory conduction decreased from 56.0 m/s to 54.2 m/s (P less than 0.01). A mean of distal and proximal sensory conduction increased (53.5 m/s vs 54.6 m/s) (P less than 0.05) as hyperglycemia was induced and decreased (54.6 m/s vs 52.3 m/s) (P less than 0.01) during clamping. Motor nerve conduction decreased insignificantly throughout the study. Mean distal motor latency decreased from 3.1 ms to 2.8 ms (P less than 0.005) immediately after induction of hyperglycemia. During hyperglycemia it increased from 2.8 ms to 3.1 ms (P less than 0.001). We conclude that acute induction of hyperglycemia in long-term diabetics seems to increase sensory conduction and decrease distal motor latency, while 120 min hyperglycemia seems to decrease sensory conduction and increase distal motor latency.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗

Body size and menopausal status in relation to the pattern of spread in recurrent breast cancer.

The prognosis and pattern of spread were related to body size and menopausal status in 863 patients with recurrent breast cancer. These patients were all enrolled in the adjuvant protocols of the Danish Breast Cancer Cooperative Group. The pattern of spread was illustrated by the number of metastases, the anatomical location of recurrence, and the rate of progression. Body size was estimated as height, weight, Quetelet index (QI), and body surface area (BSA). The body size was unassociated with both recurrence-free interval (RFI) and survival after recurrence (SAR). The groups of patients with different body size had both the same number and the same location of metastases. The tumour growth rates were estimated as clinical rates of progression (i.e. the time elapsed from a single distant metastasis until dissemination). The progression rate was unaffected by body size. Postmenopausal patients had a significantly shorter RFI and SAR compared to premenopausal patients. The number of metastatic sites, the anatomical location of metastases, and the rate of progression were similar in pre- and postmenopausal patients. The study could not confirm most findings from the literature which report a poor prognosis for patients with large body size. Moreover, the results do not suggest interactions between body size, menopausal status, and the clinical course of recurrent breast cancer.

Anthropometry↗

Adjuvant systemic treatment and the pattern of recurrences in patients with breast cancer.

The aim was to analyze the impact of adjuvant systemic treatment (AST) on the anatomical distribution, the number, and the temporal relationship of the first metastases in 635 patients (pts) with breast cancer. These patients participated in the prospective studies of AST of the Danish Breast Cancer Cooperative Group (DBCG) 77-program. All patients had primary high-risk breast cancer (i.e. node positive or local invasion or tumor size greater than 5 cm). The initial treatment was mastectomy with axillary sampling, followed by postoperative radiotherapy. The types of AST and the number of patients with recurrence were: chemotherapy (CT), 134 pts; levamisole (LEV), 96 pts; tamoxifen (TAM), 154 pts. The pattern of recurrence in these patients was compared with the pattern of recurrence in 251 pts who did not receive AST (controls). Although CT reduced the total number of metastatic sites (P = 0.04), the incidence of liver metastases was increased compared to untreated controls (P = 0.02). The median number of metastatic sites was equal in TAM- and LEV-treated pts compared to controls. The incidence of lung metastases was increased in TAM-treated pts (P = 0.03), and LEV-treated pts had a decreased incidence of lymph node (P = 0.01) and pleural recurrences (P = 0.01) compared to controls. The results may suggest that mechanisms of clonal selection during the metastatic process involve differences in sensitivity to antineoplastic treatments of metastases at various anatomical locations.

Antineoplastic Agents↗

Histological grade and steroid receptor content of primary breast cancer--impact on prognosis and possible modes of action.

The clinical course of breast cancer was related to degree of anaplasia (DA) and steroid receptor (SR) content of primary tumours in 743 patients (pts) with clinical recurrence, initially enrolled in the DBCG-77 protocols. The oestrogen receptor (ER) and the progesterone receptor (PgR) content was known in 110 and 67 pts. The recurrence-free interval, survival after recurrence, and the overall survival were all prolonged in patients with well differentiated tumours or with high SR content. The tumour growth rates were estimated as clinical rates of progression (i.e., the time elapsed from a single distant metastasis until dissemination). The progression rate was prolonged in relatively well differentiated as well as in receptor rich tumours. The extent of dissemination, as indicated by the number of metastatic sites, was not associated with either DA or SR content. However, the anatomical distribution of metastases varied with both DA and SR content: signs of poor prognosis (high DA or low SR content) were associated with occurrence of visceral metastases. In contrast, SR rich tumours had a propensity for recurrence in bone. The results suggest that the impact on prognosis of the features examined here includes both variations in growth rate and metastatic pattern.

Breast Neoplasms↗