LiPOma Of the HYPOPharynx Although lipoma is a common tumour, its presence in the pharynx is extremely rare. As a cause of death it is rarer still. These and other unusual features have prompted me to report this case. CASE REPORT

Many tests have been used to distinguish pathogenic from non-pathogenic staphylocooci ; the most useful, now generally acccpted, is the demonstration of coagulase. The coagulation of plasma by certain staphylococci was origina.lly described by Much (1908) and has been developed by many workers (Cruickshank, 1937 ; Fairbrother, 1940 ; and others). Recently Cadness-Graves et al. (1943) found that the clumping of staphylococci in plasma as determined by slide tests was roughly parallel to coagulase production and that this procedure could be used as a prasumptive test of pathogenicity. It is the purpose of this 5 7 6 . 8 . 0 9 7 , 34 : 5 7 6 . 851 .The agglutination of the Shiga bacillus is a more complicated phenomenon than seems to be generally realised. It depends on (a) the individual agglutinability of the strain employed, ( b ) the temperature at which the culture is

Aneurysm of the coronary arteries is rare. Since the first case in 1812 up to the review by Scott in 1948, 47 cases of localized aneurysm have been reported. Two further cases are described below.Case I A retired butcher, aged 66, gave a history of increasing breathlessness for one year. He also had occasional sharp pain in the chest, not typically anginal.On examination, he was cyanotic and orthopnceic and had consolidation of the upper lobe of the right lung, with bilateral basal crepitations. No clinical abnormality was noted in the heart, but an X-ray was reported as showing cardiac enlargement. Three days later his dyspncea had increased and he complained of severe pain down both arms and across the chest. His blood pressure at this time was 100/65; he had aedema over the sacrum and a blood count showed 13,700 white blood corpuscles with 79 per cent polymorphs. His W.R. and Kahn tests were negative. He was thought to have had a further coronary thrombosis with increasing heart failure, and he died the next day.Post-mortem examination. The pericardium was lightly adherent over the whole heart. Over the 87

MEASUREMENT OF GASTRO-INTESTINAL BLEEDING BEMIX At times a lack of correspondence has been observed between the two methods. On the one hand, significant radioactivity has been found with negative benzidine tests (as in days 3 and 4 of Case 2); and on the other, weakly positive benzidine reactions have been observed with no significant radioactivity in the faecal samples. These discrepancies have always been when the amount of blood was small as indicated by one test or the other. Discussion Quantitative chemical methods for determining the amount of blood present in faeces are laborious and inexact (Andrews and Oliver-GonzAlez, 1942). For this reason very little information is as yet available about the daily blood loss in many common diseases. The radio-isotope method is simpler, and its general validity was carefully worked out in experiments with dogs by Owen et al. (1954a). They labelled dogs' own red cells with

No abstract