A backfire is when the ignition of fuel doesn't take place in the ignition/combustion chamber, it(a backfire) can take place in the intake or exhaust. It can â¦ be caused by a fuel to air ratio not being correct, also if the timing of the spark is not just right that could cause it to back fire.
Melanoma in the United States. From 2005 to 2009, the median age at diagnosis for melanoma of the skin was 61, and the median age at death was 68. The age-adjusted incidence rate was 21.0 per 100,000 men and women per year.
Median age at ovarian cancer diagnosis was 54.8 years, median age at brain metastasis diagnosis was 58.3 years, and 88% had stage III/IV disease at initial diagnosis. Fifty-six percent of patients had metastases in the cerebral hemisphere alone, 15% in the cerebellum alone, and 28% had metastases at both sites.