The high frequency properties of brain tissue.

Computer modeling is becoming increasingly important in the realm of brain biomechanics and injury. New computer simulations range from modeling of brain surgery, a low frequency, high strain event, to predicting injury as a result of an impact to the head, a high frequency event with varying strain magnitudes. This range of modeling efforts requires characterization of the tissue over as wide a frequency and strain range as possible.

Problems of cervical cancer screening programmes.

The feasibility of using an age-sex register as a basis for a cervical cancer screening programme was investigated in a London practice serving both inner city and suburban populations. Only about 25% of 810 women aged 35-59 years who had not recently been screened responded to an invitation to attend a practice well woman clinic for a cervical smear. Nearly 30% of the invitations were returned ;not known at this address' and there was no reply from the remaining 45%.

A study of cancer of the breast and other sites in women after total colectomy and ileostomy for non-malignant disorders.

To assess the role in breast-cancer aetiology of oestrogenic substances apparently produced by intestinal bacteria from faecal residues associated with a high-fat diet and other absorbable and possibly carcinogenic colonic substances, cancer incidence and mortality were studied in 2425 women in the UK who had previously had total colectomy and terminal ileostomy, mostly for ulcerative colitis for Crohn's disease. The incidence of breast cancer in this group of women was no lower than would be expected, although there was a slight deficiency of deaths from this cause. These findings suggest that, at least in adult life, the colon is not involved in the aetiology of breast cancer.