Table 5.4

Breast Cancer in California

Table 5.4

Female breast cancer laterality: ratio of left- to right-sided tumors in selected locations, non-Hispanic white women with ductal carcinoma, NOS (ICD-O histology code 8500), unilateral tumors of known laterality, California, 1988-1992

		All Ages		Less than 50 Years Old		50 Years Old or Older
Primary Site (ICD-O) (1)		Cases	L/R Ratio	Cases	L/R Ratio	Cases	L/R Ratio
Central breast (174.1)
	In Situ	344	0.89	56	0.60	288	0.96
	Localized	1,740	1.02	265	0.96	1,475	1.03
Upper-outer quadrant (174.4)
	In Situ	1,799	1.07	265	0.96	1,475	1.03
	Localized	12,066	0.97	2,126	0.98	9,940	0.97
All locations
	In Situ	5,106	1.10	1,286	1.07	3,820	1.11
	Localized	30,484	1.02	5,358	1.02	25,126	1.02

Source: California Cancer Registry, November 1994. Excludes lymphohematopoietic neoplasms of the breast (ICD-O, Field Trial edition, histology codes 9590-9970) (2).

1 Numbers in parentheses are ICD-O, Field Trial edition, primary site codes (2). NOS=not otherwise specified.

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Go to Table 5.5

Breast Cancer in California

Table 5.4

Female breast cancer laterality: ratio of left- to right-sided tumors in selected locations, non-Hispanic white women with ductal carcinoma, NOS (ICD-O histology code 8500), unilateral tumors of known laterality, California, 1988-1992

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