1998 Report Index

MYELOMA
Incidence and Mortality Summary
Male Female Total
Age-adjusted incidence
rate per 100,000

# of new invasive cases
# of new in-situ cases
# of deaths
5.7

36
0
15
2.2

17
0
14


3.8

53
0
29

Total Cases by County
Ada
Adams
Bannock
Bear Lake
Benewah
Bingham
Blaine
Boise
Bonner
Bonneville
Boundary
Butte
Camas
Canyon
Caribou
 9
0
4
0
0
1
1
0
4
2
2
0
0
4
0
Cassia
Clark
Clearwater
Custer
Elmore
Franklin
Fremont
Gem
Gooding
Idaho
Jefferson
Jerome
Kootenai
Latah
Lemhi
 0
0
0
0
2
0
3
1
1
1
0
0
6
1
0
Lewis
Lincoln
Madison
Minidoka
Nez Perce
Oneida
Owyhee
Payette
Power
Shoshone
Teton
Twin Falls
Valley
Washington
Unknown
 0
0
0
3
1
0
0
3
1
0
0
3
0
0

Risk and Associated Factors
Age Multiple myeloma is an age-dependent cancer. It increases with age and rarely occurs before age 40.
Gender Rates for males and females are usually similar.
Race African Americans have a higher incidence rate, sometimes twice the rate for Caucasians.
Genetics Genetic factors play an important role in its development but how so is not completely understood. Familial factors and chronic antigenic stimulation have also been implicated.
Other Multiple myeloma has been associated with lymphomas such as Burkitt's, and non-Hodgkin's lymphomas. Studies have suggested several possible viral etiologies. Specific environmental exposures such as herbicides and radiation may also play an important role in the incidence of multiple myeloma.
Special Notes
Mean age-adjusted incidence rate across health districts:
95% confidence interval on the mean age-adjusted incidence rate:
Median age-adjusted incidence rate of health districts:
Range of age-adjusted incidence rate for health districts:
SEER rate (1991-1995): 		3.7
2.9-4.5
3.7
2.2-5.7
4.1

There were no cases of plasma cell tumors among persons less than 40 years of age. The age-specific incidence rates increased rapidly for both males and females after age group 65-69. The incidence rates for males were more than twice as high as for females after age group 75-79. No health districts had significantly more cases than expected based upon rates for the remainder of Idaho.

Stage at Diagnosis