The author discusses a number of genetically determined diseases, such as hemoglobinopathies, acute intermittent porphyria, familial Mediterranean fever and so-called acquired hypogammaglobulinemia from the geographical point of view. Possible factors explaining localized increases in incidence are discussed. The importance of isolates for the development of such foci is stressed.
We have performed laparotomy and splenectomy for seventy patients with Hodgkin's disease. Among 43 stages I or II before exploration, primary laparotomy revealed ignored abdominal localizations in 16 cases (37,2%). Involvement of the spleen occurred in 13 of these 16 patients, lonely (5 cases), associated with positive nodes (4 cases) or associated with positive nodes and liver involvement (4 cases). Among 4 stages III before exploration, no regression was found. Among 9 patients with presumed stages I or II above the diaphragm and previously treated by radiotherapy, delayed laparotomy revealed abdominal relapse in 6 cases. At last, among 14 patients with obvious stages II or IV and previously treated by combination chemotherapy, laparotomy, caused by persistent evolutive signs, showed residual localizations under the diaphragm in 8 cases. According to these results, we preconise immediate laparotomy in almost all presumed stages I or II above the diaphragm. About third of these subjects have their staging advanced to stage III or IV and, according to us must be treated by combination chemotherapy while the remaining cases justify of radiotherapy. In obvious stages III and IV delayed laparotomy may be useful in some circumstances, after chemotherapy.
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