[Differential after care for early detection of recurrence--from the general practice viewpoint].

A field-research on follow-up of GI-Carcinoma in 1989 with contributions of 159 general practitioners and physicians of Hamburg city area revealed some specific problems in performance and quality: lack of communications by and insufficient and inconstant qualifications of involved hospital staff as well as high rate of deficits in knowledge of necessary systematic examinations in symptom free patients.