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In a total of 108 acromioclavicular articulations from cadavers the osteoarthrotic changes were studied. The articulations were macroscopically and radiographically ranked according to their grade of osteoarthrosis. The two ranking lines were correlated statistically and showed a rank correlation of 0.741. In 38 articulations tomography was also carried out. These articulations were classified into five grades of osteoarthrosis and the macroscopic, conventional radiographic and tomographic gradings were compared. The correlation coefficient for tomography versus macroscopy was 0.714. Tomography versus standard radiography showed a correlation of 0.767 and standard radiography versus macroscopy a correlation of 0.841. The standard radiographic investigation reveals moderate and severe osteoarthrotic changes in the acromioclavicular joint but cannot depict smaller changes. Tomography does not seem to improve the specificity. There is a need for a better radiologic technique in the examination of the acromioclavicular joint. Radiography during some kind of loading might be a practical way of improving the specificity and make it possible to show early osteoarthrosis in the acromioclavicular articulation.

A controlled prospective study of 82 patients examined consecutively during one year by airencephalography was made. Care was taken to excude bias and to assess observer error. A close correlation was found between mental impairment (as a sign of “organic brain syndrome”, resulting from various cerebral diseases), and three airencephalographic findings, namely 1) lack of air filling over the parietal convexities (parietal air block), 2) widening of the lateral and third ventricles and 3) widening of the Sylvian and interhemispheric fissures. Of these, parietal air block was found to be the most sensitive sign. In addition to the patients with normal-pressure hydrocephalus, the majority of patients with presenile dementia and alcoholic encephalopathy had parietal air block. The results are in agreement with those reported in an earlier retrospective study.

In order to check the constancy of convexity block, the airencephalograms (AEG) of seventeen patients who had undergone two separate examinations were reexamined. A satisfactory filling by air of the basal cisterns or Sylvian fissures was a prerequisite for including the AEG in this series.

In a total of 108 acromioclavicular articulations from cadavers the osteoarthrotic changes were studied. the articulations were macroscopically and radiographically ranked according to their grade of osteoarthrosis. the two ranking lines were correlated statistically and showed a rank correlation of 0.741. in 38 articulations tomography was also carried out. These articulations were classified into five grades of osteoarthrosis and the macroscopic, conventional radiographic and tomographic gradings were compared. the correlation coefficient for tomography versus macroscopy was 0.714. Tomography versus standard radiography showed a correlation of 0.767 and standard radiography versus macroscopy a correlation of 0.841. the standard radiographic investigation reveals moderate and severe osteoarthrotic changes in the acromioclavicular joint but cannot depict smaller changes. Tomography does not seem to improve the specificity. There is a need for a better radiologic technique in the examination of the acromioclavicular joint. Radiography during some kind of loading might be a practical way of improving the specificity and make it possible to show early osteoarthrosis in the acromioclavicular articulation

We report two cases of hydrocephalus in adults. The radiological investigations and direct inspection during surgery in one of the cases indicate that the hydrocephalus is caused in both cases by a benign stricture in the region of the foramen of Monro and that this constriction is congenital. This origin of hydrocephalus has not been reported previously in adults.

Insulin secretion has been studied in two cases of insuloma. In one of them neither fasting hyperinsulinemia nor excessive insulin release in response to glucose ingestion or tolbutamide administration could be demonstrated. This patient belonged to a family in which pronounced insulin responsiveness was observed. In the other case, with hypoglycemic attacks and hyperinsulinemia following β‐cell stimulation, a higher insulin level was observed in hepatic venous blood than in portal blood, indicating extrapancreatic insulin‐producing tissue.

Twenty-two patients with dementia were examined by pneumoencephalography using special technic with the aim of filling the subarachnoid convexity space. Seven had no obvious hydrocephalus. All patients had convexity blocks which were more or less extensive. Ten had bilateral air block in the frontal, parietal and occipital regions. It was concluded that convexity air block is not a technical artifact and consequently seems to have an organic background.