BRAIN ABSCESS OF UNDETERMINED ETIOLOGY

Etiology of Anorectal Abscess

Summary Abscess formation in the anorectal region is a relatively common occurrence and contributes to a fair number of emergency surgical operations. In this paper the etiology of anorectal abscess is reviewed and an interesting case is presented. In about 20% of cases there many be obvious local cause such as infected fissure, thrombosed pile, trauma following local injection therapy, etc. I...

Pseudomelanosis Duodeni of Undetermined Etiology

Pseudomelanosis duodeni is a rare, benign condition of unknown etiology. It is characterized by collection of pigment-laden macrophages in the tips of duodenal villi. The pigment, originally interpreted as melanin, pseudomelanin, lipomelanin or hemosiderin, has now been demonstrated to be mostly ferrous sulfide. There is a strong association with chronic renal failure, arterial hypertension, di...

[Chronic left ventricular pseudoaneurism of undetermined etiology].

Pseudoaneurysms occur as a rare complication of the myocardial infarction, of which hemorrhagic process is contained by adherences of the visceral or parietal pericardium - or of both - preventing the development of cardiac tamponade. We report the case of a 55-year-old patient, with a chronic left ventricular pseudoaneurysm of undetermined etiology, who was submitted to a conservative treatment.

Etiology of Tropical Liver Abscess

Long-Term Mortality in Patients With Stroke of Undetermined Etiology

Background and Purpose—The determination of stroke etiology is essential for planning treatment for stroke prevention. However, the etiology of stroke is undetermined in many patients. Methods—During a 10-year period, consecutive patients with acute ischemic stroke were enrolled. The stroke etiology was determined based on the Trial of ORG 10172 in Acute Stroke Treatment classification. Long-te...