Myelolipoma of the thoracic spine.

We describe a myelolipoma of the thoracic spine in a patient with gradual and progressive myelopathy. MR imaging showed this predominately fatty lesion to be extradural in location.     

Congenital defects of lower limbs and associated malformations: A population based study

As part of a detailed study of limb defects and associated patterns of congenital malformations, cases with lower limb deficiencies were analysed separately. We identified a total of 130 cases with deficiencies of the lower limbs without defects of the upper limbs. This gives an incidence of 1.07/10,000 livebirths, or 1/9,337 for this group of limb defects. Most common were femur deficiencies and deficiencies of the foot. A preponderance of males was found in the group of transverse defects of the leg (fibula/tibia deficiencies) and central axis deficiencies, while females had significantly more often longitudinal tibia defects and preaxial ray defects. © 1993 Wiley-Liss, Inc.     

Recurrence after lumpectomy for comedo-type intraductal carcinoma of the breast

The morphologic subgroups of intraductal carcinoma in situ (DCIS) of the breast may be biologically different. Thirty-eight patients with comedo-type DCIS treated with local resection with or without radiotherapy are presented. Thirteen of 35 patients had a family history of breast cancer, with 11 patients having an affected first-degree relative. This is significantly increased over other series of breast cancer patients. Recurrence was ipsilateral in all patients and occurred at the site of the original disease. Recurrence occurred in 4 of 30 patients treated with local resection only and 2 of 8 treated with local resection plus radiotherapy. The length of mean follow-up was 39 months. Because of the paucity of studies, these results cannot be compared with others, but there does appear to be a significant incidence of local recurrence after resection for comedo-type DCIS. Immunohistochemical and oncogene studies as they relate to comedo-type DCIS are discussed.     

Rate and classification of interval cancers in the breast screening programme.

There has been concern about the number of interval cancers which have been detected within the National Breast Screening Programme. A series of 134 women presenting with interval cancers was studied by prospective audit and the rate and radiological classification of the tumours determined. The cancers were classified as true (67), false-negative (22), unclassifiable (28), occult (12), and minimal sign (5). The interval cancer rate did not achieve the new National Guidelines in either the first 2 years or the 3rd interval year. The false-negative cancers presented mainly in the 1st interval year, whereas the true cancers were predominantly confined to the 2nd and 3rd years. These data suggest that alterations to the screening programme may be beneficial. It may be, however, that the programme is still on the learning curve and this should be taken into account when interpreting these data.     

Age- and Sex-Related Variation in Sensitivity to the Pyrethroid Cypermethrin in the Marine Copepod Acartia tonsa Dana

Acute effects of cypermethrin, a pesticide used to treat ectoparasite infestations of salmon, were assessed using the calanoid copepod Acartia tonsa. A. tonsa has been widely used for hazard assessment of chemicals in the marine environment using acute toxicity tests, but only with randomly selected adults, assuming a sex ratio of 1:1. The present study assesses the environmental hazard of cypermethrin by exposing nauplii and adult males and females, separately. Our results showed that the naupliar stages were 28 times more sensitive to cypermethrin than adults after 96 h of exposure, with LC₅₀s of 0.005 μg L⁻¹ and 0.142 μg L⁻¹, respectively. Significant differences in sensitivity between sexes were only found during the first 24 h of exposure, with males being approximately twice as sensitive as females. The results of age-related variation in sensitivity are supported by studies with other species of copepods and toxicants, where the increased capacity of the adults for detoxification, the allometric differences in weight and size, and the molting process are given as explanations. Variation in sensitivity between sexes is discussed in terms of faster depuration rates in females through egg production and implications of feeding rate changes after 24 h of exposure. Our results suggested that standard toxicity test methods using A. tonsa are unsatisfactory because the most sensitive life stage is not included and sex-related differences in tolerance are not taken into account. We also found that cypermethrin caused significant mortality in Acartia at exposures concentrations from one to three orders of magnitudes lower than the recommended field treatment concentration for copepodic infestations. Received: 27 April 2001/Accepted: 1 July 2001     

Blood biologic markers of stroke: Improved management, reduced cost?

Identifying blood biomarkers may be of particular value in neurologic disorders such as stroke because of the difficulty in directly studying the brain and its blood vessels. Markers of brain injury, inflammation, excitotoxicity, and oxidative damage have been evaluated for their value in stroke diagnosis, treatment, and management, but none has proved to be sensitive or specific enough for routine clinical use. However, new cellular and molecular profiling approaches using the peripheral blood offer the potential for identifying panels of genes and proteins by increasing specificity while maintaining sensitivity. Furthermore, the first biomarker for predicting stroke risk associated with atherosclerosis (lipoprotein-associated phospholipase A₂) was recently approved by the United States Food and Drug Administration. The ultimate aim for stroke biomarkers is to develop rapid, easy to use, widely available, and inexpensive diagnostic tests that can be used in the clinic and in clinical trials.     

Blood loss following induction of early abortion using mifepristone (RU 486) and a prostaglandin analogue (gemeprost)

The pattern and amount of blood loss following induction of therapeutic abortion using mifepristone (RU 486) and a prostaglandin E analogue (gemeprost) was studied in 222 women of less than 63 days amenorrhoea. A single oral dose of mifepristone (400, 500 or 600 mg) was followed 48 hours later by a half or 1 mg gemeprost vaginal pessary. Complete abortion occurred in 218 (98%) women without necessity for surgical evacuation of the uterus. Bleeding commonly occurred following administration of mifepristone and prior to prostaglandin administration. The median duration of bleeding following abortion was 13 days with a range of from 1 to 44 days. There was a wide individual variation in measured blood loss between women, from 14 to 512 ml, with a median loss of 74 ml. The amount of blood loss was independent of the dose of mifepristone or prostaglandin but was significantly correlated with gestation. These results confirm that the combination of mifepristone and gemeprost is a highly effective and safe method of inducing therapeutic abortion medically. As the amount of blood loss increases with increasing gestation, it is suggested that its use should be restricted to women with amenorrhoea less than or equal to 56 days.