Subdural haematoma in Zambian Africans.
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Biomedical subjects
Publications and source records attributed to B Umerah.
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Fifty patients were studied with erect films at excretory urography. Twenty-eight had hydronephrosis, bilateral in two cases; a total of 30 hydronephrotic kidneys were therefore investigated. Thin layers of contrast medium were shown in the dilated calyces in 29 of the 30 kidneys. The layered pyelogram is a simple, sensitive urographic sign of hydronephrosis, which may be demonstrated in the absence of a discernible pyelogram in the routine film or tomograph. The basis of layering has been investigated by simple experiments. Since the layered pyelogram may be the only urographic evidence of a poorly excreting hydronephrotic kidney, erect films should be routinely used at excretory urography when this condition is to be diagnosed or excluded.
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Attention is drawn to the association of Tropical aortitis, or vasculitis with active or previous tuberculous infection. This suggests that the two diseases may be related. It is recognised that environmental factors may be important since the incidence of this complex appears to be high in the indigenous populations of Southern and Central Africa and uncommon in people of African origin in industrialised nations. Unlike classical Takayasu's arteritis, there does not appear to be any preference for young people or for females.
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