Phosphaturic Mesenchymal Tumor.

Phosphaturic mesenchymal tumors (PMTs) are neoplasms associated with tumor-induced osteomalacia. Patients typically present with pathologic fractures in the setting of chronic hypophosphatemic hyperphosphaturic osteomalacia, as well as gradual muscle weakness, bone pain, and difficulty walking. Because of their rarity and nonspecific symptomatology, phosphaturic mesenchymal tumors often go undiagnosed for years. Even when discovered on imaging, the tumors can be diagnostically challenging for radiologists. Phosphaturic mesenchymal tumors often tend to be small and can be located nearly anywhere in the body, and, therefore, can mimic many other tumors. This case highlights the imaging and pathologic markers of a phosphaturic mesenchymal tumor, often found in a patient with tumor-induced osteomalacia.

[Paratesticular sarcoma: apropos of a case with a 19-year evolution]. / Sarcoma paratesticular: a propósitio de un caso con 19 años de evolución.

Presentation of one case report of paratesticular sarcoma in a 51-year old patient undergoing surgical treatment and adjuvant systemic radio- and chemo-therapy with 19 years follow-up, that evolved with local relapse of the disease but no distant spread. Analysis of the difficulties of the pathoanatomical diagnosis, currently improved by immunohistochemical methods and the value of the adjuvant treatment.

List of essential drugs for primary care in Lebanon.

In 1966, Lebanon had around 19,000 drug formulations registered in the Ministry of Public Health. The government decreased that number to 5400 in 1992 through numerous interventions. In 1995 and in an effort to rationalize drug prescribing, the Lebanese government organized an ad hoc committee of medical and pharmaceutical experts to review the 1992 list and create a list of essential drugs for primary care (LEDPC). This report describes the process and the studies used to update the 1992 list by the ad hoc committee.

[Early onset neonatal septicemia caused by Listeria monocytogenes]. / Septicemia neonatal de comienzo precoz por Listeria monocytogenes.

Listeria monocytogenes can cause sepsis and meningitis during the neonatal period. Six cases of early onset neonatal sepsis caused by Listeria monocytogenes are reported here. These cases were diagnosed in a private hospital at Santiago, Chile from December 1984 throughout November 1986. The incidence rate was 1.4 x 1,000 liveborns. Clinical findings included prematurity (6), meconium stained amniotic fluid (6), hepatomegaly (6), splenomegaly (6), maculopapular exanthem (4), anal prolapse (3) and meningitis (1). Additionally 5 patients developed respiratory distress and 4 required ventilatory support. Overall mortality was 50% (3/6). All deaths were related to respiratory failure and occurred during the first week of disease. All patients received ampicillin and amikacin early in the course of their infection. Listeriosis of the newborn infant might be preventable by prompt recognition and treatment of maternal infections. Since Listeria infection in pregnancy is usually mild and symptoms and signs are nonspecific, prevention may be difficult. Pregnant women with fever of no clear origin or with an influenza like syndrome should be screened for listeriosis with cultures from blood, vagina and cervix samples.

[Home oxygen therapy in children with bronchopulmonary dysplasia]. / Oxigenoterapia domiciliaria en niños con displasia broncopulmonar.

Eight babies with severe bronchopulmonary dysplasia (BPD) were discharged from a private hospital at Santiago, Chile, on a program that provided oxygen therapy at home. Mean gestational age was 27 +/- 2 weeks and mean birth weight was 1,181 +/- 353 g. Discharge was decided after stabilization of arterial PO2 or O2 Sat, PCO2 less than 50 mmHg and adequate weight gain. Prior to discharge parents were trained in O2 administration and cardiopulmonary resuscitation. Oxygen was given at home for a mean of 71 days (range 7 to 339). There were no complications secondary to oxygen therapy. At follow up in only two cases additional hospitalizations were needed, in both instances because of intercurrent respiratory infections. Weight gain between 3d and 50th percentile were seen in all cases. Oxygen therapy at home appears to be a good alternative in the treatment of infants with BPD, and it reduces significantly hospital stay and costs. Both optimal family conditions and adequate support at home are needed.

Platelet-activating factor acetylhydrolase in term and preterm human milk: a preliminary report.

Human milk may protect against necrotizing enterocolitis (NEC). Since platelet-activating factor (PAF) may participate in the pathophysiology of NEC, we measured PAF acetylhydrolase (PAF-AH), which metabolizes PAF, in term and preterm human milk. The activity of PAF-AH in term milk collected 2-4 days after delivery (n = 17) was 2.7 +/- 1.2 nmol x min-1 x ml-1. A higher activity was found in milk collected at similar times from mothers who delivered between 33 and 36 weeks of gestation (n = 6, 5.6 +/- 2.1 nmol x min-1 x ml-1, p < 0.01). However, milk from mothers who delivered between 26 and 32 weeks of gestation had a PAF-AH activity similar to that of term milk (n = 6, 3.0 +/- 0.7 nmol x min-1 x ml-1). With advancing lactational age, PAF-AH activity in term milk decreased, whereas the activity of this enzyme in preterm milk remained unchanged. In milk samples collected beyond 14 days after delivery from women who gave birth between 33 and 36 weeks or 26 and 32 weeks of gestation, PAF-AH activity was fivefold higher than that found in milk for women delivering at term (3.7 +/- 1.3 and 3.6 +/- 3.6 nmol x min-1 x ml-1 serum 0.7 +/- 0.4 nmol x min-1 x ml-1, respectively, p < 0.05). We speculate that the presence of PAF-AH in human milk may protect against NEC in preterm newborns.