Hyperthyroidism is defined as an excessive production of thyroid hormones by eutopic or ectopic mature thyroid tissue. The overall prevalence of hyperthyroidism is 1.2% and the most common cause is Graves’ disease. Struma ovarii represents 1% of all ovarian tumors and is an uncommon cause of ectopic hyperthyroidism. It is benign in >90% of the cases; usually asymptomatic, and only 8% are presented with thyrotoxicosis, being rare its association with Graves’ disease. We report the case of a patient with this association.

El hipertiroidismo se define como la producción excesiva de hormonas tiroideas a partir de tejido tiroideo maduro eutópico o ectópico. La prevalencia general de hipertiroidismo es 1.2%, y la causa más frecuente es la enfermedad de Graves. El estruma ovárico representa el 1% de todos los tumores ováricos y es una causa infrecuente de hipertiroidismo ectópico. Su comportamiento es benigno en más del 90% de los casos; usualmente asintomáticos, sólo el 8% se presentan con tirotoxicosis, y es infrecuente su asociación con enfermedad de Graves. Se comunica el caso de una paciente con esta infrecuente asociación.

ABSTRACT The aim of this work was to study the prevalence of Listeria monocytogenes in foods obtained in retail shops and food industries located in Montevideo-Uruguay, and to identify the serogroups of the obtained isolates. Three-thousand one-hundred and seventy-five food samples (frozen, deli meats, ready-to-eat and cheese) were analyzed. The obtained isolates were serogrouped by multiplex PCR and serotyped by conventional procedure. Genetic comparisons were performed using pulsed-field gel electrophoresis on a sub-set of isolates belonging to the same serotype successively recovered from the same establishment. L. monocytogenes was isolated from 11.2% of samples. The highest prevalence was observed in frozen foods (38%), followed by cheese (10%). 1/2b and 4b were the most frequently identified serotypes. In six of 236 analyzed establishments we successively recovered L. monocytogenes isolates belonging to the same serotype. Most of them corresponded to serotype 1/2b. Pulsed-field gel electrophoresis profiles suggest that at least 33% of L. monocytogenes 1/2b isolates are genetically related and that may remain viable for prolonged periods. The observed prevalence of L. monocytogenes was lower than reported in neighboring countries. Our findings highlight the role that frozen foods may play in the spread of this pathogen, and the relevance of serotypes 1/2b and 4b.

The family Pteriidae is well represented in tropical and subtropical continental shelf regions. Two names belonging to the genus Pteria are usually recorded in the literature from the southwestern Atlantic: P. colymbus (Röding) and P. hirundo (Linnaeus). The study of living specimens sampled off Buenos Aires coast aboard of the R/V Puerto Deseado allows updating the geographic range of the Atlantic wing oyster Pteria colymbus in the region. Type materials of related species are illustrated. Ecological requirements and shell morphology description of P. colymbus are provided. This study constitutes the first revision of this species from Argentine waters.

La familia Pteriidae se encuentra bien representada en áreas tropicales y subtropicales. A lo largo del océano Atlántico sudoccidental, dos nombres pertenecientes al género Pteria han sido citados en la bibliografía. Estos son: P. colymbus (Röding) y P. hirundo (Linnaeus). El estudio de nuevos ejemplares vivos recolectados frente a las costas de Buenos Aires a bordo del BO Puerto Deseado permitió actualizar el rango de distribución geográfica de la especie Pteria colymbus. Adicionalmente se ilustró el material tipo de las especies nominales relacionadas. Se relevaron los requisitos ecológicos y se describió la morfología de la concha de P. colymbus. Este estudio constituye la primera revisión de esta especie en aguas argentinas.