PubMed Health⌕ Search

SEARCH · PubMed Health

Results for “RESPIRATORY TRACT NEOPLASMS”

Explore indexed PubMed citations for clinical trials, systematic reviews and public health research. Read source abstracts and follow each citation to its original PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 433 records · Page 24Linked to original sources
PubMed1992

[Incidence and prevalence of respiratory tumors in Italy. Estimation from mortality data].

This study estimates the incidence and prevalence of larynx and lung cancers using a mathematical model based on available data on specific mortality and survival. In Italy, larynx and lung cancers account for more than 95% of respiratory cancers. In this paper, estimates of age/sex-specific and age-standardized incidence rates and prevalence are presented for the years 1970 and 1987. Age and birth-cohort effects on incidence are also presented by sex and broad geographical area. The procedure was firstly validated using data from four cancer registries: Varese (Northern Italy), Parma (North-Central Italy), Florence (Central Italy), and Ragusa (Southern Italy). Estimates were then carried out at the national level and for each major geographical area (i.e. North, Center and South). Larynx cancer age-standardized incidence rates increased for men by about 25% from 1970 to 1987. Age-specific rates increased for ages greater than 44 years, but decreased for younger ages. Cohort effects are low for older cohorts; they steeply increase and plateau for the 1900-1905 cohorts, and then peak for the 1930 cohort. The risk for cohorts born after 1930 systematically decreases. We estimated that the 1930 birth cohort has a risk five times higher than the 1890 cohort. For women, the incidence rates increased by about 30% from 1970 to 1987, for all age classes. Cohort effects steadily increase from the 1886 birth cohort to the 1960 cohort. The estimated prevalence between ages 30 and 84 increased from about 24,400 cases in 1970 (23,000 males and 1,400 females) to about 51,400 cases in 1987 (48,600 males and 2,800 females). For men, 42% of the increase can be attributed to an increase in the incidence of the disease; 45% can be attributed to population aging, and only 13% to an increase in the survival probability. Corresponding figures for women are 42%, 48%, and 10%. For lung cancer, we estimated 32,000 incident cases for 1987 (28,000 men and 4,000 women), two times the corresponding figures for 1970 (14,000 men and 2,000 women). Looking at age-adjusted rates, the overall risk of lung cancer increased by about 60% for men and 52% for women during a period of 17 years. Age-specific incidence rates increased proportionally with age for ages greater than 50 years. By contrast, there was a slight but systematic risk reduction in younger age classes.(ABSTRACT TRUNCATED AT 400 WORDS)

Adolescent↗
PubMed1977

The effect of respiratory carcinogenesis on systemic humoral and cell-mediated immunity of Syrian golden hamsters.

The effect of intratracheal instillation of benzo(a)pyrene and its noncarcinogenic analog benzo(a)pyrene on the systemic humoral and cell-mediated immune response of Syrian golden hamsters was evaluated. Hamsters treated with the carcinogen had a transient suppression of the splenic plaque-forming cell response to sheep erythrocytes, compared with analog-treated controls. The numbers of direct (immunoglobulin M) and indirect (immunoglobulin G) plaque-forming cells were suppressed at the 9th week of treatment and then recovered to control levels. No suppression in the cell-mediated immune response, as assessed by the rejection of Chinese hamster skin grafts, was found.

Animals↗
PubMed1977

Multiple primary malignant neoplasms. The Connecticut experience, 1935-1964.

Results for non-simultaneously diagnosed malignant tumors from Connecticut indicate that individuals with one malignant neoplasm have 1.29 times the risk of developing a new independent primary tumor when compared to individuals who never had cancer (P less than 0.01). However, the increased risk of multiple primary tumors is highly selective on a site-specific basis. Table 135 presents Connecticut Registry data indicating the risk of a subsequent primary malignancy by anatomic site of the later primary in patients with a first primary cancer. Tables 136 and 137 present tabulations for anatomic sites with statistically significant excesses and deficiencies, with an analysis by time interval between the two malignancies. Finally, Table 138 presents figures showing histologic confirmation for site-group paris with significant excesses of observed-over-expected later primary malignant neoplasms. The reader should bear in mind that just as the risk of subsequent primaries varies with the anatomic site of the subsequent primary (Table 135), the risk is also highly dependent upon the anatomic site of the first primary cancer (Chapters 6-12).

Aged↗
PubMed1985

Second cancer following cancer of the respiratory system in Denmark, 1943-80.

A 10% increased risk of developing a second cancer was observed among approximately 36,000 persons reported to the Danish Cancer Registry with a cancer of the respiratory system during 1943-80. This estimate is markedly influenced by a striking tendency by physicians not to report or the Cancer Registry not to accept a report of a second lung cancer following a primary lung cancer (14 observed vs. 99 expected). A significant 30% excess of all second cancer was seen after laryngeal cancer (368 vs. 282), whereas the 22% excess following cancer of the nasal cavities and paranasal sinuses did not quite reach the level of statistical significance (95% CI = 0.9-1.6). For cancers of the lung and larynx, second cancers arose mainly in the buccal cavity, bladder, kidney (after lung cancer only) and lung (after laryngeal cancer only). These second cancers may be due to common carcinogenic factors, most likely tobacco. Elevated risks of second cancers of the breast, cervix uteri, and other female genital organs were found consistently. Radiotherapy may have contributed to the increased risk of breast cancer, but the excess risk of cancer of the female genital organs other than the cervix was unexpected. Although not significant, the risk of esophageal cancer following cancer of the larynx was below expectation (1 vs. 4.1), which was surprising because alcohol consumption and smoking are thought to be common risk factors for these 2 sites. Significant excesses of pancreatic cancer were observed following cancers of the lung, larynx, and nasal cavities, which might be due to more careful medical surveillance of these patients or to common risk factors such as cigarette smoking. Finally, the risk of a patient developing liver cancer after lung cancer was significantly elevated (22 vs. 11.6). This increase is unlikely to be due to misdiagnosed metastases from the lung, inasmuch as the risk was generally elevated throughout the observation period.

Denmark↗