The occurrence of unusual renal lesions in 2 siblings, the second and fourth child of a young Yemenite woman, is reported. One of the siblings, a male infant, died 48 hours after birth and multiple metanephric hamartomas were found in his normal‐sized kidneys. The second sibling, a stillborn delivered 3 years later, had both kidneys enlarged by multiple nodules of neoplastic nephrogenic tissue similar to that observed in Wilms' tumor and corresponding to the picture of diffuse nephroblastomatosis. The presence of these 2 lesions in siblings may be considered as support for the origin of Wilms' tumor from embryonic nephrogenic tissue.

Two cases of unusual cough related stress injuries of the ribs are described. Both were detected on a 2 h delay bone scan. To our knowledge, cough stress injuries have been not previously described scintigraphically.

A case of abdominal aortic occlusion and collateral circulation diagnosed by 99mTc-DTPA radionuclide angiography and confirmed by contrast aortography is presented. Early hepatic activity was seen, and the relation of this phenomenon to aortic occlusion is discussed.

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