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OBJETIVO: avaliar a história familial e as características dos tumores em dois grupos distintos por sua faixa etária, bem como questionar quanto à necessidade de colectomia estendida, baseando-se nestas características. MÉTODO: Em estudo retrospectivo analisaram-se 106 pacientes por meio do prontuário e de contato telefônico com o próprio doente e/ou familiares, operados no HC-UFPR. Foram divididos em 2 grupos: Grupo A (n=51) com 55 anos ou menos, e Grupo B (n=55) com mais de 55 anos. Avaliou-se o número de doentes com parentes de 1º. grau com câncer colorretal e em outros sítios; o número de parentes com CCR; o sítio do tumor; o estadiamento TNM; os óbitos no período e a presença de neoplasias associadas. RESULTADOS: No grupo A, 16 (31,4%) pacientes tinham parentes com câncer colorretal. No grupo B, sete (12,7%) (p=0,032). No grupo A houve 16 (31,4%) pacientes de familiares com outro tipo de neoplasia. No grupo B, 19 (34,5%) doentes (p=0,837). Ao incluírem-se apenas as neoplasias associadas à Síndrome do HNPCC, como endométrio e estômago, houve 5 (9,8%) pacientes no grupo A e 3 (5,9%) no grupo B (p=0,477). No grupo A, 3 (5,8%) doentes apresentaram neoplasias associadas ao CCR, sendo elas estômago, rim e bexiga. No grupo B, 3 (5,4%) doentes, mas os tumores eram de mama e próstata (p=0,624). Predominou no grupo A pacientes com estádio III (41,2%) e no grupo B, o estádio II (51,9%) (p=0,480). Houve 19,6% de óbitos no grupo A e 32,7% no Grupo B (p=0,185). CONCLUSÃO: Pacientes com idade = 55 anos possuem história familial mais representativa para o CCR que pacientes mais idosos, podendo fazer parte da síndrome do HNPCC. Possivelmente se beneficiem de colectomia estendida. AIM: To evaluate the family history and the characteristics of the tumors in two different groups of patients, divided by age, questioning the necessity of extensive colectomy for the adequate treatment. METHODS: One hundred and six patients were analyzed retrospectively by hospital chart review or phone contact either with the patient or a next of keen; all were operated at the University Hospital of the "Universidade Federal do Paraná" (Brazil).These patients were divided in Group A (n=51) below 55 years old, and Group B (n=55) with age above 55 years. All patients were analyzed for first degree relatives with history of colon and rectal cancer and cancer history in other organs; number of relatives with colon and rectal cancer; the location of the tumors in the colon; the TNM staging; the occurrence of other malignant neoplasias for each patient; and the death rate for the period of the study. RESULTS: On group A, 16 (31.4%) patients had relatives with colorectal cancer; on group B, 7 (12.7%) (p=0,032). On group A, 16 (31.4%) patients had relatives with other types of malignant neoplasias, and on group B, 19 (34.5%) (p=0.837). When it was considered only cancers related to the HNPCC syndrome, as endometrium and stomach, 5 (9.8%) patients were found on group A and 3 (5.9%) on group B (p=0.477). On group A, 3 (5.8%) patients had tumors related to colon and rectal cancers, as stomach, kidney and bladder. On group B, 3 (5.4%) patients, but these tumors were in the breast and prostate (p=0.624). On group A, there were more patients with stage III cancers (41.2%) and on group B, stage II cancers were more prevalent (51.9%) (p=0.480). The death rate was 19.6% on group A and 32.7% on group B (p=0.185). CONCLUSION: Patients under 55 years of age have an increased family history of colon and rectal cancer when compared to the ones above the age of 55; those could be related to the HNPCC syndrome. These patients can benefit from an extended colectomy

História familial e câncer colorretal em idade precoce: deve-se indicar colectomia estendida?