In 1958 we became concerned that a large number of the young female patients (over the age of 15) being submitted to appendicectomy were found to have normal appendices. We were also interested that this situation did not seem to apply to young male patients in the same age-group.A study of the literature available at that time did nothing to augment our knowledge or assuage our curiosity, but merely substantiated that " appendicitis " is more common in young women than in young men. This situation, however, was so only after puberty and was not found in childhood (Lee, 1961). There was wide variation in the reported cure rate after operation for chronic appendicitis: Alvarez (1940) gave 4000, Gallagher and Stevenson (1955) 87%, andOsborne (1959) 57%. Thackray (1959) compared the histology of appendices removed for "chronic appendicitis " and those removed incidentally during gynaecological operations. He found no differences in the two groups, each having a similar number of diseased and normal appendices.Harding (1962) found that of 369 appendices removed for "acute appendicitis" from female patients aged 11 to 30 59% were histologically normal.These papers and the correspondence they led to in the medical press emphasized the problem but did nothing to explain its causes. Many suggestions on aetiology were advanced but were unsubstantiated.
Scope of InvestigationsIt was planned to study all those young women who presented in the out-patient department and/or were admitted electively with symptoms of recurrent pain in the right iliac fossa, and those who were admitted as emergencies with " acute appendicitis " but found to have healthy appendices, to try to discover, where all organic disease had been excluded, what, if any, other factors-for example, social and emotional-might be operating. By comparing the findings with those on all young women admitted and operated on for proved appendicular disease it was hoped to learn whether there were any differences between the two groups which might be significant as diagnostic criteria. Further, by planning a prospective study, the aim was to follow the patients for a reasonably long period in order to assess the long-term effect of appendicectomy in both groups.The investigations were limited to one surgical unit with 13 female beds. The unit is responsible for receiving all surgical emergencies every third week.
MethodsClinical.-All patients included in the study were investigated and treated clinically in the usual way. Where surgery was performed all the appendices were subject to pathological investigations, except where the appendix at operation was so obviously diseased as to leave the diagnosis in no doubt. Only those appendices which showed no abnormality of any kind, both macroscopically and histologically, were regarded as normal (Harding, 1962).Social.-A detailed analysis of the social and emotional factors and their relation to the clinical findings proved difficult to do. Every effort was made to make the appraisal of the facts presented as objec...