Table 4.

Comparison of the frequency of cancer in children* in Mexico City and in four selected countries

Diagnostic Group	Mexico City 1980–19919/		Mexico City 1992–199310/		Mexico City 1996–2001		USA-SEER White 1983–19922/		German Federal Republic 1985–19902/		France 1983–19923/		Cuba 1986–19905/
	n	%	n	%	n	%	n	%	n	%	n	%	n	%
I. Leukemias	1706	34.9	78	39.2	784	46.1	1757	30.7	2422	34.4	746	29.4	454	30.7
II. Lymphomas**	888	18.2	34	17.6	194	11.4	616	10.7	781	11.1	310	12.2	271	18.3
Hodgkin disease	524	10.7	18	9.0	65	3.8	259	4.5	279	4.0	103	4.1	84	5.7
Non-Hodgkin lymphoma	364	7.5	16	8.6	129	7.6	357	6.2	502	7.1	207	8.1	187	12.6
III. CNST	496	10.2	25	12.6	197	11.6	1222	21.4	1392	19.8	538	21.2	223	15.1
IV. SNST	133	2.7	6	3.0	39	2.3	469	8.2	552	7.8	244	9.6	104	7.0
V. Retinoblastoma	420	8.6	5	2.5	73	4.3	172	3.0	208	2.9	61	2.4	40	2.7
VI. Renal Tumors	279	5.7	9	4.5	71	4.2	366	6.4	464	6.6	152	5.9	69	4.7
VII. Hepatic Tumors	70	1.4	1	0.5	30	1.8	83	1.5	82	1.2	23	0.9	21	1.4
VIII. Bone Tumors	321	6.6	9	4.5	97	5.7	267	4.7	359	5.1	129	5.1	87	5.9
IX. Soft Tissue Sarcomas	238	4.9	10	5.0	89	5.2	387	6.8	492	7.0	154	6.1	91	6.2
X. Germ Cell Tumors	256	5.2	17	8.6	110	6.5	165	2.9	222	3.2	71	2.8	34	2.3
XI. Carcinomas	55	1.1	3	1.5	18	1.1	193	3.4	55	0.8	108	4.3	55	3.7
XII. Nonspecific	18	0.4	0	0	0	0.0	21	0.4	7	0.1	2	0.1	29	2.0
Total	4880	100	198	100	1702	100	5718	100	7036	100	2538	100	1478	100

Note: Numbers in circles indicate the five highest frequencies, in descending order *Children 0–14 years **40 cases of histiocytosis were not included CNST: central nervous system tumors SNST: sympathetic nervous system tumor References 2,3,5,9,10.