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B C de Vries

Publications and source records attributed to B C de Vries.

5 recordsLinked to original sources
PubMed1989

[Carcinoembryonal antigen and the follow up of patients after resection of colon carcinoma with curative intent: a Markov process in decision analysis].

The follow-up of colon cancer patients by monitoring serum carcinoembryonic antigen has advantages (better survival after early detection of recurrence by CEA rise) as well as disadvantages (false-positive rise of CEA, and early detection of incurable recurrences in asymptomatic patients). The effects of CEA follow-up on quality-adjusted life expectancy (QUALE) of patients with curatively resected colon carcinoma have been simulated by a Markov analysis using literature data. The value of CEA seems insignificant and varies, depending on the literature data used, from a mean increase of QUALE by 6 days (+0.4%) to a mean decrease by 2 days (-0.07%). This value depends on patient-related variables; the negative effects of CEA especially predominate in older patients with favourable Dukes' stages of primary tumour.

Carcinoembryonic Antigen↗
PubMed1987

A prospective study of ultrasonography in the diagnosis of appendicitis.

The diagnosis of appendicitis is frequently difficult. We studied prospectively the diagnostic accuracy and clinical impact of abdominal ultrasonography in 111 consecutive patients thought to have appendicitis. Ultrasonography was performed with small high-resolution, linear-array transducers, with the abdomen compressed to displace or compress bowel and fat. Among 52 patients later shown in surgery to have appendicitis, ultrasonography was unequivocally positive in 39 (sensitivity, 75 percent). Of 31 patients in whom appendicitis was definitely excluded, none had a positive ultrasound examination (specificity, 100 percent). The sensitivity in those with a perforated appendix (28.5 percent) was much lower than in those with acute nonperforating appendicitis (80.5 percent) or appendiceal mass (89 percent), but the low sensitivity did not influence clinical management, since the need for surgery in patients with a perforated appendix was clinically obvious. Ultrasonography resulted in changes in the proposed management in 29 of the 111 patients (26 percent). It also led to the correct diagnosis in the 16 patients who were found to have a disease other than appendicitis. We conclude that ultrasonography is a useful aid in the diagnosis of appendicitis.

Adolescent↗
PubMed1987

[Gallstone ileus].

Explore the source record for details and available documents.

Cholelithiasis↗
PubMed1987

Radiation appendicitis: demonstration with graded compression US.

In a patient who had received presurgical radiation therapy for extensive rectal carcinoma, ultrasonography with graded compression disclosed an inflamed appendix. The patient had no clinical signs of acute appendicitis. At laparotomy for resection of the rectal carcinoma, the appendix appeared grossly abnormal and was removed. Pathologic examination showed severe radiation enteritis of the appendix. The sonographic appearance of radiation appendicitis closely resembled that of acute appendicitis.

Adult↗