| 1. |
- Brandt, Andreas, et al.
(författare)
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Risk of incident and fatal melanoma in individuals with a family history of incident or fatal melanoma or any cancer.
- 2011
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Ingår i: British Journal of Dermatology. - : Oxford University Press (OUP). - 1365-2133 .- 0007-0963. ; 165, s. 342-348
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Tidskriftsartikel (refereegranskat)abstract
- Background: A family history of melanoma is associated with an increased risk of melanoma and probably of other, discordant cancers. Limited data are available on familial mortality in melanoma. If fatal forms of melanoma were associated with fatal forms of melanoma or of some other cancers, only studies on familial mortality rather than on familial incidence might be able to detect them. Furthermore, estimates on familial aggregation based on mortality are free from bias of overdiagnosis. Objectives: The aim of this study was the estimation of familial aggregation of concordant melanoma and of melanoma and any other cancers both based on incidence and mortality. Methods: We used the nation-wide Swedish Family-Cancer Database to calculate standardized incidence ratios (SIR) for incident melanoma for relatives of any cancer patients and standardized mortality ratios (SMR) for death in melanoma for relatives of individuals who died from any other cancer. Similar risks were determined for any common cancer when relatives were affected by melanoma. Results: For concordant melanoma, familial incidence equalled familial mortality, SIR=SMR. Familial clustering (SIRs increased) of melanoma and esophageal, colorectal, breast, prostate, kidney, nervous system and connective tissue cancers and myeloma and leukaemia was observed. The SMRs for pancreatic and nervous system cancers were increased in relatives whose parents had died from melanoma. Conclusions: These data should encourage search for fatal subtypes of familial cancer, which may eventually have clinical implications.
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| 2. |
- Hemminki, Kari, et al.
(författare)
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Does the Breast Cancer Age at Diagnosis Differ by Ethnicity? A Study on Immigrants to Sweden
- 2011
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Ingår i: The Oncologist. - : Oxford University Press (OUP). - 1083-7159 .- 1549-490X. ; 16:2, s. 146-154
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Tidskriftsartikel (refereegranskat)abstract
- Background. Age-specific incidence rates for breast cancer in low-risk and high-risk ethnic populations differ by age at which the incidence maximum is reached: around 50 years in low-risk populations and over 60 years in high-risk populations. The interpretation of these differences remains unsettled, one line primarily referring to biological differences, the second one to cohort effects of rapidly increasing rates in young populations, and the third one to incomplete registration of cancer in the elderly. Methods. The nationwide Family-Cancer Database was used to analyze standardized incidence ratios (SIRs) and age at diagnosis of breast cancer in female immigrants to Sweden by their region of origin compared with women native to Sweden matched on birth year and other relevant factors. Results. We showed first that the SIRs for breast cancer were lower in many immigrant groups compared with natives of Sweden; women from Turkey had the lowest SIR of 0.45, followed by those from Chile (0.54) and Southeast Asia (0.57). Women from nine regions showed an earlier mean age at diagnosis than their matched Swedish controls, the largest differences being 5.5 years for women from Turkey, 5.1 years for those from Asian Arab and "Other African" countries, 4.3 years for those from Iran, and 4.0 years for those from Iraq. Conclusions. The results show that in many immigrant groups, the diagnostic age is earlier (< 50 years) than in natives of Sweden (> 50 years), suggesting that true biological factors underlie the differences. These factors may explain much of the international variation in breast cancer incidence. Identifying these factors should advance understanding of breast cancer etiology and prevention. The Oncologist 2011; 16: 146-154
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| 3. |
- Hemminki, Kari, et al.
(författare)
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Familial Mortality and Familial Incidence in Cancer.
- 2011
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Ingår i: Journal of Clinical Oncology. - 1527-7755. ; 29, s. 712-718
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Tidskriftsartikel (refereegranskat)abstract
- PURPOSE An overwhelming majority of data on familial risk in cancer is based on incident cancer, whereas familiality in cancer mortality is largely unknown. If fatal form of cancer was a highly familial subtype, then familial risk for mortality may exceed that of incidence, which would be particularly relevant for clinical decision making and counseling. PATIENTS AND METHODS The individuals in the nationwide Swedish Family-Cancer Database were classified according to family history of fatal and nonfatal cancer. Familial risks of incident and fatal concordant cancer were calculated for offspring based on their parental family history using a Cox model with hazard ratio (HR); offspring without family history were the reference. Results Most HRs for offspring incident cancers were somewhat higher for fatal compared with nonfatal parental family history. For breast (HR, 1.87 fatal v 1.66 nonfatal; P < .001) and prostate (HR, 2.30 fatal v 1.84 nonfatal; P < .001) cancers, 51.0% of patients with familial breast cancer and 56.6% of patients with prostate cancer had fatal family history. HRs for death in offspring according to a fatal compared with nonfatal family history were significantly increased for colorectal (HR, 1.76 v 1.47, respectively; P = .02), breast (HR, 1.97 v 1.51, respectively; P = .002), and prostate (HR, 2.03 v 1.59, respectively; P = .002) cancers. TNM classification did not seem to differ between the family histories. We showed also that an overwhelming proportion of offspring were diagnosed after the parental death. CONCLUSION Familial breast, prostate, and colorectal cancers might have a yet unidentified genetic component associated with poorer survival. It may be useful to record survival data in family history records.
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| 4. |
- Hemminki, Kari, et al.
(författare)
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Incidence and mortality in epithelial ovarian cancer by family history of any cancer.
- 2011
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Ingår i: Cancer. - : Wiley. - 1097-0142 .- 0008-543X. ; 117, s. 3972-3980
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: Practically all data on familial risk in ovarian and other cancers are based on incident cancer, whereas familiality in cancer mortality is largely unknown. If fatal forms of cancer are a highly familial subtype, then familial risk for mortality may exceed that of incidence, which is relevant for clinical decision making and counseling. METHODS: Ovarian cancer patients in the nationwide Swedish Family Cancer Database were classified according to fatal and nonfatal (incident) family history. Familial risks for incident and fatal ovarian cancer were calculated for offspring based on their parental or sibling family history of any cancer using standardized incidence ratios (SIRs) for incidence and standardized mortality ratios (SMRs) for mortality. Offspring without family history were referents. RESULTS: The database included 24,757 mothers and 8138 daughters with ovarian cancer. When a mother had ovarian cancer, the SIR for incident ovarian cancer in daughters was 2.69, and when a sister had ovarian cancer it was 3.49. The SMRs for fatal cancer by fatal cancer in probands were 3.39 and 5.80, respectively. For fatal serous cancers among siblings, the SMR was 6.16, compared with 10.01 for the endometrioid type. Ovarian cancer was associated with maternal (SIR, 1.22; SMR, 1.56) and sororal breast cancer (SIR, 1.27). Another discordant association was between ovarian and paternal prostate cancer (SIR, 1.12; SMR, 1.66). CONCLUSIONS: Fatal familial risks were higher for concordant ovarian, ovarian-breast, and ovarian-prostate cancers than the corresponding incident risks. This may suggest that highly fatal subtypes exist for these cancers, calling for genetic dissection. Cancer 2011. © 2011 American Cancer Society.
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| 5. |
- Mousavi, Seyed Mohsen, et al.
(författare)
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Esophageal cancer risk among immigrants in Sweden.
- 2011
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Ingår i: European Journal of Cancer Prevention. - 1473-5709. ; 20, s. 71-76
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Tidskriftsartikel (refereegranskat)abstract
- Esophageal squamous cell carcinoma is linked to alcohol drinking, whereas esophageal adenocarcinoma risk is increased by overweight and obesity. Both histologies are directly related to tobacco smoking. We wanted to define the risk of esophageal cancer by histology and length of stay among immigrants in Sweden. The nationwide Swedish Family Cancer database (2010 version: data on cancers originate from the nationwide Swedish Cancer Registry) was used to calculate standardized incidence ratios (SIRs) for esophageal cancer among immigrants compared with the native Swedes. SIRs for lung cancer were also calculated as a proxy for smoking prevalence. The patient series covered 5930 male and 1998 female Swedes, and 410 and 198 immigrants. The risk of esophageal cancer was increased in female Finns (SIR=1.66), Britons (3.73), and Southeast Africans (5.26), whereas male Baltic (0.44), former Yugoslavian (0.47), other Europeans (0.58), and other Asians (0.52) showed a decreased risk. The risk of squamous cell carcinoma was increased among Finns (men=1.32, women=1.90) and Iranian women (3.80), whereas Danish men (1.66) had an increased risk of adenocarcinoma. No trend was observed for the risks in immigrants according to the length of stay. We found no covariation between the birth region-specific SIRs for squamous cell carcinoma and lung cancer. Early childhood exposures or preservation of original habits might be the main environmental exposures influencing squamous cell carcinoma risks in some immigrants. The increased risk of adenocarcinoma among Danish men may confirm the role of obesity in adenocarcinoma risk.
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| 6. |
- Mousavi, Seyed Mohsen, et al.
(författare)
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Risks of papillary and follicular thyroid cancer among immigrants to Sweden
- 2011
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Ingår i: International Journal of Cancer. - : Wiley. - 0020-7136. ; 129:9, s. 2248-2255
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Tidskriftsartikel (refereegranskat)abstract
- Previous studies have indicated that ionizing radiation, particularly during childhood, is the main established risk factor for thyroid cancer. History of benign nodules/adenoma, goiter, iodine deficiency or high-iodine intake might be other associated factors. We wanted to define the histology-specific thyroid cancer risk in the first-generation immigrants to Sweden. We used the 2010 update of the nation-wide Swedish Family-Cancer Database (>12 million individuals; 1.8 million immigrants; histology code in force since 1958) to calculate standardized incidence ratios (SIRs) for histology-specific thyroid cancer among immigrants compared to the native Swedes. The patient series covered 2,604 male and 6,406 female Swedes, and 247 and 863 immigrants. The median age at immigration was 29 years, and the median age at thyroid cancer diagnosis was 46 years. Increased risks for female papillary carcinoma were observed for Finns (SIR = 1.63), former Yugoslavians (2.36), Russians (2.34), other East Europeans (2.14), Turks (3.16), Iranians (2.68), Iraqis (2.77), East and Southeast Asians (2.92), other Asians (1.69) and South Americans (2.23). Male Iranians (2.85), East and Southeast Asians (3.57) and other Asians (2.26) had an increased risk for papillary carcinoma. Only male East and Southeast Asians (2.93) had an increased risk for follicular carcinoma. The data might suggest that immigrant populations in Sweden from areas of low or high-iodine intake are at risk of papillary carcinoma, implicating iodine imbalance as a contributing factor to our findings. The increased risk of thyroid cancer among Asian immigrants may confirm the role of childhood-ionizing radiation on thyroid cancer risk.
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| 7. |
- Riihimaeki, Matias, et al.
(författare)
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What Do Prostate Cancer Patients Die Of?
- 2011
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Ingår i: The Oncologist. - : Oxford University Press (OUP). - 1083-7159 .- 1549-490X. ; 16:2, s. 175-181
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Tidskriftsartikel (refereegranskat)abstract
- Background. A recent rise in the incidence of prostate cancer and a more favorable outcome have increased the proportions of other causes of death in affected men. Extending the survival of prostate cancer patients thus requires knowledge of all causes of death. Methods. Data on the population, cancers, and causes of death were gathered from the nationwide Swedish Family-Cancer Database. A Cox regression model, comparing prostate cancer patients with all other men, was applied. Hazard ratios (HR) were calculated both for the underlying cause and for dying with a specific cause listed among multiple causes of death. Findings. Among 686,500 observed deaths, 62,500 were prostate cancer patients. For underlying causes other than prostate cancer, the highest cause-specific HRs were found for external causes (HR, 1.24; 95% confidence interval [CI], 1.16-1.31), diseases of the pulmonary circulation (HR, 1.22; 95% CI, 1.09-1.37), and heart failure (HR, 1.18; 95% CI, 1.11-1.24). For specific multiple causes, the highest HRs were found for anemia (HR, 2.28; 95% CI, 2.14-2.42), diseases of the pulmonary circulation (HR, 1.61; 95% CI, 1.55-1.68), and urinary system disease (HR, 1.90; 95% CI, 1.84-1.96). Interpretations. Prostate cancer patients have a higher risk for dying from various causes other than prostate cancer, including external causes and heart failure. Mechanisms have been proposed linking these elevated risks to both cancer and treatment. More attention should be paid to comorbidities in men with prostate cancer. The present study fulfills a gap in the knowledge of death causes in prostate cancer patients. The Oncologist 2011; 16: 175-181
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