International Journal of Epidemiology, Vol 28, 196-203, Copyright © 1999 by International Epidemiological Association
M Serafini, C Cordaro, E Montanari, F Falcini and L Bucchi
BACKGROUND: Treatment of cervical intraepithelial neoplasia grade 3 (CIN3)
is one of the most unexplored issues of the monitoring of cervical cancer
screening. We evaluated (1) the frequency of major patterns of diagnosis
and treatment of CIN3 (ICD-O code 8070.2), (2) the determinants of
hysterectomy as a first choice treatment, and (3) the determinants of
invasive cervical squamous carcinoma (CSC) detection among CIN3 cases
treated by hysterectomy. METHODS: A population-based, retrospective,
descriptive (objective 1) and analytical (objectives 2 and 3) study was
conducted by the Romagna Cancer Registry (Northern Italy). Included were
316 CIN3 patients (median age, 38.5 years; range, 21-80) registered between
1986 and 1993 and meeting one of the following eligibility criteria:
histological diagnosis of CIN3 on biopsy with any subsequent treatment,
histological diagnosis of CIN3 on conization, histological diagnosis of
CIN3 on hysterectomy with previous negative/benign (< or = CIN2) biopsy
or conization. Multivariate associations were evaluated by the multiple
logistic regression. RESULTS: Of 316 patients, 264 (84%) were first
diagnosed on biopsy, 39 (12%) on conization, and 13 (4%) on hysterectomy.
Among the 264 patients diagnosed on biopsy, the first choice treatment was
local destructive therapy for 16 (6%), conization for 155 (59%) and
hysterectomy for 93 (35%). Age was the strongest uni/multivariate predictor
of hysterectomy (the most frequent first choice treatment >40 years)
followed by adequacy of biopsy (inverse association) and place of treatment
(decreased probability for patients treated outside the area and in the
private sector). Among the 93 CIN3 patients undergoing hysterectomy, 23
(25%) had a CSC diagnosed. Multivariate analysis showed that the
probability of CSC detection was related to adequacy of biopsy (inverse
association), year of registration, and biopsy-to-treatment interval
(inverse association). CONCLUSION: Hysterectomy was a common treatment for
patients with CIN3 on biopsy. Only in a minority of hysterectomized
patients was a CSC diagnosed. Difficulties and inefficiencies in the biopsy
and assessment procedure were found to be important factors in the
management and outcome of CIN3 patients.
ARTICLES
Diagnosis and treatment of cervical intraepithelial neoplasia grade 3: a registry-based study in the Romagna region of Italy (1986-1993)
Romagna Cancer Registry, Luigi Pierantoni Hospital, Forli, Italy.
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