[Picture of the month. Gallbladder concremont].
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Aged↗
Biomedical subjects
M Rosenkilde
Publications and source records attributed to M Rosenkilde.
Renal duplication artefacts in ultrasound imaging.
A duplication artefact is sometimes encountered on ultrasound examination of the left kidney. It is caused by sound beam refraction between the spleen and adjacent fat. The purpose of this study was to analyse the frequency and types of such artefacts, and examine their physical background. The examiner searched for a left renal duplication artefact in 150 unselected abdominal ultrasound studies. A disturbed contour of the left kidney could be formed in 34 of 123 patients in whom the spleen was in the image without covering the kidney completely. An artefact was seen significantly more often when the lower pole of the spleen was rounded (30/87) than when it was wedge shaped (4/36) (p < 0.02). The artefacts could be categorized into complete upper pole duplication (n = 4), incomplete upper pole duplication (n = 14) and bayonet artefact (n = 16). The thickness of the renal cortex appeared reduced with upper pole duplication artefacts owing to a geometric image compression, which could also be seen in an in vitro experiment. Left renal duplication artefacts are not rare when the upper part of the kidney is examined by ultrasound through the spleen.
Adolescent↗
Congenital urethral polyp--a rare cause of infravesical obstruction. A case report.
Urethral polyps are uncommon but may result in infravesical obstruction. A case diagnosed by voiding cystourethrogram and sonography is presented.
Child, Preschool↗
Adrenoleukodystrophy. A case report.
PURPOSE: Adrenoleukodystrophy is a hereditary, usually X-linked recessive disorder, characterized by progressive demyelination of cerebral white matter and adrenal insufficiency. MATERIAL AND METHODS AND RESULTS: We report the case of a 14-year-old boy, presenting the typical changes in CT and MR with almost symmetrical changes in the white matter only, with no mass effect and a rim of enhancement. Adrenoleukodystrophy may resemble tumour but shows no mass effect. DISCUSSION AND CONCLUSION: We discuss the differential diagnoses and underline the importance of the characteristic appearance of this disease. Adrenoleukodystrophy is diagnosed by serum analysis.
Adolescent↗