epidemiology of oral and cervical cancer
TRANSCRIPT
By
sukumar.s
‘09 althean
One of the ten most common cancers in the world.
High frequency: in central and south east asiancountries like bangladesh,India,Sri lanka and Thailand.
In India, incidence is 12.48/lakh of males and 5.52/lakh of females.
Mortality: 3.48/lakh in males and 1.34/lakh in females.
1. Tobacco: approx. 90% cases in south east asia - linked to usage of tobacco.
During 1966-77, a epidemiological survey studied 30,000 individuals over 3 districts of ernakulam(kerala), srikulam(andhra) and bhavnagar(gujarat). Risk – 36 times higher.
2.Alcohol: high concentrations – increased incidence.
3.Pre cancerous stage: like erythroplakia, leukoplakia etc. which can be detected 15 yrs prior it changes to an invasive carcinoma.
4. High risk groups: include Tobacco chewers, bidi smokers, using tobacco in the form of betal quid and those sleep with tobacco quid in the mouth.
5. Cultural patterns: Indigenous forms of smoking are bidi, chutta(cigar), chilum, hookah(hubble,bubble).
In India, tobacco is chewed as betal quid – consists of betal leaf, arecanut, lime and tobacco.
Another type of cancer - in eastern coastal regions of Andhra pradesh – is epidermoid carcinoma of hard palate - Associated with reverse smoking of cigar.
2nd most common cancer among women.
5,24,000 cases all over the world in 1995 – In India, 80% of cases.
Higher incidence in Latin America, Sub-saharanAfrica and South east asia.
a. the disease :
b. causative agent : human papilloma virus. found in > 95 % of cases.
Age : in women 25 to 45 yrs. Genital warts : present or past occurrence. Marital status : in those who are single, more likely
widowed,divorced or separated and having multiple sexual partners.
Early marriage, early child bearing and repeated child birth – inc. the risk.
OCPs : inc. duration of use and high dose of estrogen.
Socio – economic status : in lower economic groups due to poor genital hygiene.