[Studies on parametrial infiltration of uterine cervical cancer (author's transl)].

It is clear that the prognosis of uterine cervical cancer depends on the spread of cancer, especially lymphnodes metastases and parametrial infiltration. The correct diagnosis of parametrial infiltration before treatment is, however, difficult and there are many over- and under-diagnosis. In this paper, we discuss the details of parametrial infiltration based on the radically hysterectomized specimens in Shinshu University Hospital from 1964 to 1978. In these period, 284 cases of uterine cervical cancer were operated by Okabayashi's radical hysterectomy and our postoperative classification were carried out. The results were as follows; 1) The incidence of parametrial infiltration were 16.4 in Stage Ib, 36.6% in Stage IIa, 57.5% in Stage IIb and 35.6% in all cases. 2) When divided the parametrial tissue into three parts, we could find carcinomatous infiltration into uterine part in 77.3% of positive cases, middle part in 16.2% and pelvic part in 16.2%. 3) The agreement between clinical diagnosis and histological findings were 72.2% in all cases. 4) The CPL classification had close relation with parametrial infiltration (C type; 0%, P type; 17.9%, L type; 61.8%). 5) The 5-year survival rate of patients with infiltration showed poor outcome (63.0% in 81 cases), but that with no infiltration had good prognosis (98.4% in 128 cases). In conclusion, parametrial infiltration is very important for treating the uterine cervical cancer patients.