High Prevalence of Opaline XXXX in Urinary Stones From Burkina Faso.

@entity1 @entity1290 @entity3440 @entity3835
(A) OBJECTIVES: To underline peculiar @entity1290 and to propose an epidemiologic studies of urinary stones in West-Africa countries, which are scarce. Only few data are available regarding stone composition in sub-Saharan countries. Recently, a set of 100 stones consecutively removed by surgery in the Department of Urology of the University Hospital of Ouagadougou in Burkina Faso were collected for physical analysis, providing the opportunity to obtain an epidemiological profile of stone composition in this country. (B) METHODS: 100 stones from 64 @entity1 , 22 @entity1 , 10 @entity1 and 4 @entity1 were analysed by morphological examination, infrared spectroscopy and electron microscopy in our laboratory. The results were considered by sex and separately for adults and @entity1 . (C) RESULTS: Among the 100 stones, 65% contained @entity3835 as the main component. Interestingly, the second main component was opaline @entity3440 (18%). Furthermore, this peculiar compound was identified in any proportion in 48% of the stones. The prevalence was sex and age dependent. Opaline @entity3440 was detected as the main component in 42% of the nuclei, underlining its role as one of the main components involved in the initiation of calculi in this country. (D) CONCLUSIONS: For the first time, a dramatically high occurrence of a "scarce" urinary stones' component, namely opaline @entity3440 , was reported in a series of consecutive calculi from a single country. We propose that a regular consumption of clay could be the origin of this phenomenon in these populations.
