[Relative frequency of malignant and benign tumors in Arlit, Niger. Analysis of data from anatomopathological examinations over a 15-year period]. / Fréquence relative des tumeurs malignes et bénignes à Arlit (Niger): bilan de 15 ans d'examens anatomo-pathologiques.

The purpose of this study was to determine the frequency and distribution of cancer in the uranium-mining region of Arlit, Niger, based on extensive data from all the anatomopathological examinations performed at local hospitals over a 15-year period. The overall annual incidence, i.e., 26 per 100000, was similar to incidences reported elsewhere in Africa. The rate of examinations leading to diagnosis of malignancy decreased between 1991 and 1997 and, for unexplained reasons, varied from one practitioner to another. There was no evidence of a higher rate of any cancer that might result from possible exposure to radiation during mining operations. The distribution of cancer by organ was unremarkable, i.e., in order of frequency, womb and ovaries in women; skin and prostate in men; thyroid and lymphatic tissue in both genders.