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[A clinical survey of brain abscess (3rd report): special reference to chronological analysis of EEG on brain abscess (author's transl)].

The attention of those concerned with the management of intracranial abscess has been largely directed to a study of the findings in clinicopathological and neuroradiological investigations. Our object, in this communication is to arouse interest in the electroencephalographic survey, especially chronological electroencephalographic study of absecess patients. The clinical material forming the basis of this study is drawn from a series of 46 consecutive cases of intracranial abscess treated, during 3 years, in the neurosurgical department of Tokyo Women's Medical College.

Adolescent

Peri-anal abscess--the relationship between peri-anal abscess, hepatitis B and sexual behavior.

Twenty-two patients with a peri-anal abscess or peri-anal fistula were studied selectively for the presence of HBsAg and anti-HBs. In 14 male and 8 female patients studied, the incidence of anti-HBs was 6 and of HBsAg 1. Positive findings occurred only in European male patients who invariably showed frequent homosexual contacts. It is concluded that, in homosexual patients with peri-anal abscess, the presence of HBsAg and anti-HBs should be determined as a matter of routine and all preventive measures should be taken for possible contamination with hepatitis B virus until proven negative.

Abscess

Pyelonephritis, cortical abscess, and perinephric abscess.

The causative agent in nonobstructive pyelonephritis has been shown most often to be P-fimbriated Escherichia coli, mainly because receptors for these fimbriae are found in the bladder, ureter, and the kidney tubules. Age and sex are factors leading to differences in the presentation of the disease, and early diagnosis followed by intensive therapy lessens the chance of renal damage. Renal abscess, perinephric abscess, and pyonephrosis all follow pyelonephritis in the host who is compromised by the presence of stone, obstruction, diabetes, or immunosuppression.

Adult

Splenic abscess as complication of perinephric abscess.

Retroperitoneal extension of perinephric abscess with fistulization to intra-abdominal and intrathoracic structures has been well documented in the literature. Intraperitoneal rupture is much less common, and exceptionally may not present as an acute abdominal condition. We describe herein 1 such case involving the spleen. Since the extent of the disease may not be apparent radiologically, and often is only ascertained at the time of surgery, we recommend an aggressive approach to renal calculi as the most effective means of preventing complicated perinephritis.

Abscess