Br Med J (Clin Res Ed) 1984;289:896-898 (6 October), doi:10.1136/bmj.289.6449.896
Cervical smear histories of 500 women with invasive cervical cancer in Yorkshire.
M E Paterson,
K R Peel,
C A Joslin
The smear histories of 312 women with cancer of the cervix have
been determined. Eighty nine women had had at least one negative
smear reported in the 10 years before a diagnosis of cancer
and 14 had had more than one negative smear. Fifty six of the
89 women had had a negative smear in the three years preceding
the diagnosis of cancer. The highest number of negative smears
(61) reported was among the 115 women aged under 45. Fifty eight
slides reported as negative were submitted to independent review;
13 were subsequently reported as negative, 11 as unsatisfactory,
and 34 as abnormal. These findings may in part explain why in
this region there has been a disappointing reduction in the
incidence of clinically invasive cervix cancer, and our findings
may also apply elsewhere. Nevertheless, the confirmed negative
smears chiefly occurred within three years of clinical cancer,
particularly in the younger women, and this finding suggests
that these women may have a short preinvasive phase.

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