[Viral infections and neoplasms of the uterine cervix]. / Infezioni virali e neoplasia della cervice uterina.

Since the last century, epidemiological studies of cervical carcinoma have shown a close link with sexual activity and in particular with promiscuity starting at an early age. Aetiological research has therefore concentrated on identifying sexually transmitted pathogens. In recent years studies have focused on the apparently significant role of HSV and particularly HPV in the aetiopathogenesis of this tumour. After the first cytohistological findings the HPV-cervical cancer link has been confirmed by electron microscopy, immunohistochemical studies and hybridisation of viral DNA. The identification of different HPV types presenting varying degrees of oncogenic risk offers the prospect of reaching a reliable prognosis on the basis of the particular virus identified in the lesion. The hypothesis that the virus has a decisive influence on the biology of th tumour is also intriguing: findings on the incidence and course of cervical cancer in the youngest women seems to suggest tha HPV may be a fundamental tumour growth factor.

Pepsinogen gastrin mesor ratio: a potential simple marker for gastric secretory function.

As compared to control subjects, patients with duodenal ulcer show decreased levels of serum G and increased levels of serum Group I pepsinogen (PGI). On the other hand, pregnant women in their third trimester show an increased level of serum G and decreased levels of serum PGI. Gastrin stimulates gastric secretion and has a trophic effect on the parietal cells. Concentrations of PGI in serum reflect the capacity of pepsin-secreting cells which are, in turn, closely related to the parietal cell mass. Pepsinogen/G ratio (PGI/G) could represent the effective acid-peptic secretory capacity. This study suggests that for screening and clinical purposes PGI/G ratio provides a good potentially discriminatory marker of gastric secreting capacity reliably correlating and improving the diagnostic significance of single G and/or PGI serum levels.

The maternal 24-h blood pressure (BP) profile as a predictor of fetal distress.

No mention is made of any aspect of BP bioperiodicity, among current clinical criteria for diagnosing pregnancy-related hypertension. The abnormal BP, based on a single unqualified measurement, is accepted and utilized as a clinical feature to identify pregnancy at risk. Systolic, diastolic and mean arterial blood pressure were measured every 15 min for 24 h in 5 women (2 non pregnant clinically healthy subjects, 1 clinically healthy subject in her third trimester of pregnancy, 1 presenting mild and 1 severe toxiemia, also in their third trimester of pregnancy) by an automated BP recording apparatus (Dynamap). All variables, analyzed by the single cosinor method, exhibited statistically significant circadian rhythms. A high amplitude could nullify the time-unqualified usual range. The change in circadian amplitude precedes an overt mesor hypertension and constitutes a tool for earlier detection of fetal distress.