Detección prenatal de masa ovárica y tratamiento posnatal / Prenatal detection of an ovarian mass and postnatal treatment

Todo neonato al que se le detecta una lesión abdominal necesita ser controlado clínicamente, con valoración oportuna y eficiente. La detección neonatal de quistes de ovario se ha incrementado desde la introducción rutinaria de la ecografía prenatal. Los quistes de ovario no son raros en el recién nacido y su evolución clínica es variable. En la mayoría de los casos, el pronóstico es favorable. Aún no existe un consenso sobre su manejo; el tratamiento quirúrgico se considera necesario en los recién nacidos con quistes mayores de 4 cm. Se presenta el caso de una recién nacida a término, sin antecedentes de interés. A las 30 semanas de gestación se le diagnosticó mediante ultrasonido obstétrico un tumor abdominal. Al nacimiento, en la exploración física, presentó insuficiencia respiratoria grave. Tras ecografía abdominal, se detectó una masa retroperitoneal. Se realizó laparotomía, y se evidenció un quiste de ovario izquierdo de 8 X 10 X 10 cm y 410 g de peso. El informe de anatomía patológica reveló la existencia de un quiste hemorrágico que precisó operación. La evolución fue satisfactoria, por lo que la paciente fue dada de alta hospitalaria, con posteriores controles en consultas externas (AU)

[Mechanisms of calcium absorption and absorption modifiers based in the elaboration of a low-cost diet for osteoporosis patients]. / Los mecanismos de absorción de calcio y los modificadores de absorción con base para la elaboración de una dieta de bajo costo para pacientes osteoporóticas.

This article contemplates recent investigations about calcium absorption and offers inexpensive alternatives to enhance dietary calcium bioavailability, also focused in bone mass loss, which may lead to osteoporosis. Recent data about risk factors, calcium metabolism, economical data, and nutrition tables were collected, to get a general overview of the problem, and expose it to health care and food manufacture professionals. We conclude: a) osteoporosis has an expensive socioeconomical cost, b) most of the actual therapies are expensive and have a limited therapeutical benefit, c) the typical mexican diet is calcium rich, but has poor bioavailability, d) it is easier to prevent bone mass loss than recover it, e) a rich calcium diet with a good bioavailability through life, specially in childhood, will attain a peak bone mass, f) improvement of calcium bioavailability is technically possible by food processing. G) by following a few principles calcium bioavailability can be improved in a normal diet at a low cost. Considering all of this, in theory, it could be possible to reduce the morbidity-mortality rate caused by osteoporosis in mexican people.

Histological and radiographic determination of the age of physeal closure of the distal femur, proximal tibia, and proximal fibula of the New Zealand white rabbit.

A longitudinal study was performed in a series of 124 New Zealand White rabbits to determine the radiographic versus the histologic age of closure of the growth plates of the distal femur, proximal tibia, and proximal fibula. Periodic assessment was made by standard radiographs and histological studies. Histologically, growth plates in the distal femur closed at 19-24 weeks; growth plates in the proximal tibia, at 25-32 weeks; and growth plates in the proximal fibula, at 26-32 weeks. Radiographically, evidence of closure of growth plates in the distal femur occurred at 20-23 weeks; in the proximal tibia, at 22-27 weeks; and in the proximal fibula, at 23-31 weeks. A discrepancy in age between radiographic and histologic closure of the growth plate occurred in 3.6% of the femora, 10.9% of the tibias, and 16% of the fibulas.