[Calcium response to vitamin D supplementation]. / Respuesta de la calciuria a suplementos de vitamina D.

Several studies show the importance of serum vitamin D sufficient levels to prevent multiple chronic diseases. However, vitamin D supplementation and its effects on urine calcium excretion remain controversial. The objective of this prospective and interventional study was to evaluate urine calcium excretion in women with normal calciuria or hypercalciuria, once serum vitamin D sufficiency was achieved. We studied 63 women with idiopathic hypercalciuria, (9 with renal lithiasis) and 50 normocalciuric women. Both groups had serum vitamin D levels low (deficiency or insufficiency). Baseline urine calcium excretion was measured before being supplemented with vitamin D2 or D3 weekly or vitamin D3 100.000 IU monthly. Once serum vitamin D levels were corrected achieving at least 30 ng/ml, a second urine calcium excretion was obtained. Although in the whole sample we did not observe significant changes in urine calcium excretion according to the way of supplementation, some of those with weekly supplementation had significant higher urine calcium excretion, 19% (n = 12) of hypercalciuric women and 12% (n = 6) of the normocalciuric group. Monthly doses, also showed higher urine calcium excretion in 40% of hypercalciuric women (n = 4/10) and in 44% (n = 4/9) of the renal lithiasis hypercalciuric patients. In conclusion, different ways of vitamin D supplementation and adequate serum levels are safe in most patients, although it should be taken into account a subgroup, mainly with monthly loading doses, that could increase the calciuria significantly eventually rising renal lithiasis risk or bone mass loss, if genetically predisposed.

[Rapidly progressive crescentic glomerulonephritis in the elderly]. / Glomerulonefritis rápidamente progresiva en ancianos.

Rapidly progressive glomerulonephritis (RPGN) is a syndrome characterized by glomerular lesions giving rise to acute renal injury that develops within a brief period of time, usually days or a few months. It is classified according to the underlying mechanism of injury and the immunofluorescence findings into four main disorders. In the last decade, nephrologists have witnessed a steady rise in the mean age of the patients diagnosed with RPGN. This observation may reflect an increase in the incidence of this entity and also a more timely diagnosis. We present 3 cases of RPGN in elderly patients, diagnosed within a 3 month period at our institution which illustrates the spectrum of these conditions.

Glomerulonefritis rápidamente progresiva en ancianos / Rapidly progressive crescentic glomerulonephritis in the elderly

La glomerulonefritis rápidamente progresiva (GNRP) es un síndrome clínico que se caracteriza por la presencia de signos urinarios de enfermedad glomerular e insuficiencia renal de desarrollo en un lapso de días a pocos meses. La inmunofluorescencia permite clasificar a las GNRP en cuatro tipos según se identifiquen o no depósitos inmunes y, si están presentes, de acuerdo con su naturaleza. En la última década se ha demostrado un aumento constante en el promedio de edad de los pacientes con GNRP. Este fenómeno podría reflejar tanto una mayor incidencia de la enfermedad, como un incremento en la tasa de diagnóstico. Se presentan 3 casos de GNRP en adultos mayores de 65 años, diagnosticados en un periodo de 3 meses en nuestra institución.

Rapidly progressive glomerulonephritis (RPGN) is a syndrome characterized by glomerular lesions giving rise to acute renal injury that develops within a brief period of time, usually days or a few months. It is classified according to the underlying mechanism of injury and the immunofluorescence findings into four main disorders. In the last decade, nephrologists have witnessed a steady rise in the mean age of the patients diagnosed with RPGN. This observation may reflect an increase in the incidence of this entity and also a more timely diagnosis. We present 3 cases of RPGN in elderly patients, diagnosed within a 3-month period at our institution which illustrates the spectrum of these conditions.

Glomerulonefritis rápidamente progresiva en ancianos / Rapidly progressive crescentic glomerulonephritis in the elderly

La glomerulonefritis rápidamente progresiva (GNRP) es un síndrome clínico que se caracteriza por la presencia de signos urinarios de enfermedad glomerular e insuficiencia renal de desarrollo en un lapso de días a pocos meses. La inmunofluorescencia permite clasificar a las GNRP en cuatro tipos según se identifiquen o no depósitos inmunes y, si están presentes, de acuerdo con su naturaleza. En la última década se ha demostrado un aumento constante en el promedio de edad de los pacientes con GNRP. Este fenómeno podría reflejar tanto una mayor incidencia de la enfermedad, como un incremento en la tasa de diagnóstico. Se presentan 3 casos de GNRP en adultos mayores de 65 años, diagnosticados en un periodo de 3 meses en nuestra institución.(AU)

Rapidly progressive glomerulonephritis (RPGN) is a syndrome characterized by glomerular lesions giving rise to acute renal injury that develops within a brief period of time, usually days or a few months. It is classified according to the underlying mechanism of injury and the immunofluorescence findings into four main disorders. In the last decade, nephrologists have witnessed a steady rise in the mean age of the patients diagnosed with RPGN. This observation may reflect an increase in the incidence of this entity and also a more timely diagnosis. We present 3 cases of RPGN in elderly patients, diagnosed within a 3-month period at our institution which illustrates the spectrum of these conditions.(AU)

Glomerulonefritis rápidamente progresiva en ancianos. / [Rapidly progressive crescentic glomerulonephritis in the elderly].

Rapidly progressive glomerulonephritis (RPGN) is a syndrome characterized by glomerular lesions giving rise to acute renal injury that develops within a brief period of time, usually days or a few months. It is classified according to the underlying mechanism of injury and the immunofluorescence findings into four main disorders. In the last decade, nephrologists have witnessed a steady rise in the mean age of the patients diagnosed with RPGN. This observation may reflect an increase in the incidence of this entity and also a more timely diagnosis. We present 3 cases of RPGN in elderly patients, diagnosed within a 3 month period at our institution which illustrates the spectrum of these conditions.