Mature teratoma of the pineal region in the paediatric age group: A case report and review of the literature

@#Introduction: Intracranial teratomas account for 0.5% of all intracranial tumours and 2-4% of intracranial tumours in children. However, in terms of tumours of the pineal area, the exact incidence is not ascertained. Although, it is noted that 50-60% of central nervous system (CNS) germ cell tumours are found in the pineal gland. The degree of difficulty in the sampling of lesions in the pineal gland during biopsy emphasizes the importance of correlating the imaging studies, histopathologic findings, and serum and cerebrospinal fluid (CSF) tumour markers. Case Report: This case report is that of a 9-year-old male who presented with frontal headache of eight days, with associated photophobia, nausea and vomiting, and diplopia. Biopsy with intraoperative navigation was done and the specimen was referred for histopathologic evaluation. The biopsy showed findings consistent with a mature teratoma with no histologic findings of an immature component or secondary somatic malignancy. Comparison of the pre-operative and post-operative multiaxial cranial CT scan showed findings that was consistent with a residual lesion. This was correlated with the pre-operative serum tumour markers which showed alpha-fetoprotein of 22.5 ng/mL and beta-HCG of 1.0 mIU/mL(IU/L), and the post-operative tumour markers of the cerebrospinal fluid that showed alpha-fetoprotein of 3.28 ng/mL and beta-HCG of 18.9 mIU/mL (IU/L). Conclusion: A review of the literature and comparison with current case in relation to the histopathologic, serum and CSF findings, and imaging studies was done to better understand the mechanism of this lesion.

Polimorfismo G1385A del gen RNASEL y su asociación con el desarrollo de cáncer de próstota: estudio preliminar / G138A polymorphism of the RANASEL gene and its association with the development of prostate cancer: preliminary study

El cáncer de Próstata (CAP), es una enfermedad compleja de origen multifactorial. Se caracteriza por patrones heterogéneos de crecimiento de tejido neoplásico, que varían ampliamente en su progresión, edad de aparición y respuesta al tratamiento. Se considera la segunda causa más común de muerte por malignidad en hombres y se estima que uno de cada cinco padece de CAP en el curso de su vida. La etiología genética de la transformación neoplásica de las células prostáticas normales aún es desconocida, sin embargo, investigaciones epidemiológicas han demostrado un fuerte componente genético en su desarrollo, y sugieren tanto un patrón de herencia mendeliana como la presencia de loci de susceptibilidad a lo largo del genoma humano. Se ha descrito una región cromosómica relacionada con el CAP denominada como HPC1, en el locus 1q24-25, donde se ubica el gen RNASEL, y las mutaciones en el mismo, se han asociado con la presencia del CAP en múltiples grupos familiares. EL gen RNASEL codifica para una ribonucleasa que degrada ARN viral y celular y que interviene en la apoptosis. Se ha reportado disminución de la actividad enzimática de hasta tres veces en portadores del polimorfismo G1385A de este gen, y la misma se ha asociado frecuentemente con el desarrollo del CAP. Mediante la utilización de una variante de la Reacción en Cadena de la Polimerasa (RCP), una amplificación alelo específica, se estudiaron 103 individuos masculinos con y sin CAP pertenecientes a la población de Maracaibo, Venezuela, evidenciándose ausencia de asociación.

Prostate Cancer (CAP), is a complex disease with a multifactorial origin. It is characterized by heterogenous patterns of growth of neoplasic tissue, varying widely in its progression, age of beginning and therapy response. It is considered as the second most common cause of death by cancer in men and, it has been estimated, that one of five, suffers of CAP through the course of his life. The genetic etiology of neoplasic transformation of normal prostate cells is still not known; nevertheless, investigations in epidemiology have demonstrated a strong genetic component in its development, suggesting so much a pattern of mendelian inheritance as the presence of loci of susceptibility throughout the human genome. It has been described a cromosomic location related to the CAP in locus 1q24-25, denominated HPC1, where the gene RNASEL is located, and the seggregation of its alleles has been associated with the development of CAP in numerous familiar groups. The RNASEL gene codifies for a ribonuclease protein that degrades viral and cellular ARN and takes part in the apoptosis. A decrease of the enzymatic activity up to three times in carriers of the G1385A polymorphism of this gene has been reported, and the same has been associated frequently with the development of CAP. Using a variant of the Polymerase Chain Reaction, Allele specific amplification, this investigation had as objective to determine the association between variant G1385A and CAP, in a sample of 103 masculine individuals with and without CAP, pertaining to the population of Maracaibo, Venezuela, An association between these variants and CAP could not be demonstrated.

Infección por Chlamydia trachomatis en mujeres consultantes en Maracaibo, Venezuela / Chlamydia trachomatis infection in females consulting health centres in Maracaibo, Venezuela

Objetivo Evaluar la prevalencia de infecciones por Chlamydia trachomatis en un grupo de mujeres sintomáticas y asintomáticas que asistieron a control en servicios de ginecología en centros de salud de Maracaibo, estado Zulia. Métodos Se incorporaron al estudio 168 pacientes que asistieron a dos centros de salud de Maracaibo. Se llevó a cabo evaluación ginecológica basada en examen pélvico, de áreas profundas de la vagina y cuello uterino. Las pacientes fueron clasificadas en grupos etarios y de acuerdo a la presencia de manifestaciones clínicas. Para investigar C. trachomatis, se aplicaron dos ensayos de amplificación de ADN del plásmido endógeno y del gen OMP1, a partir de hisopados endocervicales. Resultados Se evaluaron 168 pacientes, 81 (48,2 por ciento) sintomáticas y 87 (51,8 por ciento) asintomáticas. Se encontró una prevalencia de 7,7 por ciento en la población total evaluada. La prevalencia fue de 9,9 por ciento y 5,8 por ciento para las pacientes sintomáticas y asintomáticas, respectivamente (p>0,05). El grupo de pacientes de 18-28 años exhibió la más alta prevalencia (13,7 por ciento) (p=0,0322). Las manifestaciones clínicas predominantes fueron secreción mucopurulenta (35,8 por ciento) y cervicitis (21 por ciento). C. trachomatis fue detectada en 7,1 por ciento pacientes con secreción mucopurulenta y 23,5 por ciento casos de cervicitis, pero no se demostró asociación significativa entre infección y manifestaciones clínicas individuales (p>0,05). Conclusión Se encontró una mediana prevalencia de infecciones por C. trachomatis en la población evaluada, exhibiendo mayor frecuencia en mujeres jóvenes. Este microorganismo debería ser investigado en mujeres jóvenes sexualmente activas, independientemente de su condición sintomática o asintomática.

Objective Evaluating Chlamydia trachomatis infection prevalence in a group of symptomatic and asymptomatic females attending gynaecology services in health centres in Maracaibo in the state of Zulia in Venezuela. Methodology 168 patients attending two health centres in Maracaibo were included in this study. Gynaecological evaluation was based on examining the pelvis, deep areas of the vagina and the cervix. Patients were classified into groups according to age and the presence of clinical manifestations. Two DNA amplification assays of endogenous plasmid and the omp1 gene taken from endocervical swabs were used for investigating C. trachomati. Results 168 patients were evaluated; 81 (48,2 percent) were symptomatic and 87 (51,8 percent) asymptomatic, A 7,7 percent prevalence (p>0.05) was found in the total population (9,9 percent prevalence for symptomatic patients and 5,8 percent for asymptomatic ones). The 18- 28 year old patient group exhibited the highest prevalence (13,7 percent) (p=0.0322). The predominant clinical manifestations were mucopurulent secretion (35,8 percent) and cervicitis (21 percent). C. trachomatis was detected in 7,1 percent of patients having mucopurulent secretion and 23,5 percent of cervicitis cases; however, no significant association between infection and individual clinical manifestations was shown (p>0.05). Conclusion Medium C. trachomatis infection prevalence was found In the population being assessed here, the highest frequency being exhibited in young females. This microorganism should be investigated in sexually-active young women, regardless of their symptomatic or asymptomatic status.