Vaginal stones with a pinpoint hymenal opening.

Primary vaginal stones are a rarely reported complication of a congenital vaginal septum, an imperforated hymen, vaginal scarring or female circumcision. We report a woman who had vaginal stones with a microperforate hymen.

[Quality assurance (general) at the medical school of Heidelberg as a model]. / Qualitätsförderung (allgemein-) medizinischen Hochschulunterrichts im Rahmen des Heidelberger Modells.

Because of new social and professional challenges, especially in the developed countries, there is a trend towards change and quality assurance is taking place in medical education over the past 20 years. In Heidelberg, the new way of teaching the students by general practitioners includes quality assurance by questionnaires, reports of practice visits, quality conferences of the teachers, and co-operation of the students. 90% of the students recommended the practice-based structured program as very useful, especially the work with the patients in the general practices, 87% of the teaching general practitioners accepted special criteria for teaching; by this way an academic general practice can be established to meet the future expectations of primary medical care.

An electrophoretic analysis of RNA synthesis in normal and lobeless Ilyanassa embryo.

RNA from pulse-labelled normal and lobeless Illyanassa embryos was analysed by electrophoresis on polyacrylamide gels. The proportional distribution of radioactivity among the RNAs made by these two types of embryos was compared statistically. It was shown that removal of the third polar lobe from the Ilyanassa egg at first cleavage did not produce any change in the proportion of several size classes of RNA transcribed during the first day od development. The post-gastrular lobeless embryo did show a significant deviation from the normal pattern of RNA synthesis, though it is not clear that this was a direct effect on transcription by the polar lobe cytoplasm.