Un simulador clásico de vasculitis sistémica / A classic mimicker of systemic vasculitis

Fundamento y objetivo. Las manifestaciones embolígenas y constitucionales de los tumores cardíacos intracavitarios se engloban dentro de los mimetizadores clásicos de las vasculitis sistémicas, sobre todo en aquellas ocasiones donde no se presentan manifestaciones cardiológicas. Se describe un caso de mixoma auricular con clínica exclusivamente sistémica, cuya orientación diagnóstica inicial fue de vasculitis. Se revisan los casos descritos en la literatura. Paciente y método. Se describe un caso de mixoma auricular con presentación en forma de manifestaciones sistémicas sin sintomatología cardiológica acompañante. Se expone el caso clínico y se compara con 11 casos de seudovasculitis por mixoma auricular descritos en la literatura, haciendo énfasis en las similitudes y divergencias. Discusión. Los síntomas constitucionales junto con las manifestaciones cutáneas fueron los más frecuentes. La mayoría de los casos presentaban respuesta parcial al tratamiento glucocorticoideo, reforzando la teoría del componente inflamatorio en su patogenia. La demora media en el diagnóstico fue de 12,27 meses. Conclusión. El mixoma auricular es un simulador de vasculitis sistémica y es de difícil diagnóstico cuando no presenta manifestaciones cardíacas. La demora diagnóstica puede conllevar complicaciones graves (AU)

Background and objective. Embolic and constitutional manifestations of intracavitary cardiac tumors are included within the classic mimickers of systemic vasculitis, especially in those in which there are no cardiac manifestations. We present a case report of atrial myxoma in which the patient only presented systemic symptoms and in whom an initial diagnostic approach of systemic vasculitis was made. We also performed a literature search of the cases described. Patient and method. A case report of atrial myxoma with atypical presentation manifested as a systemic disease with no concomitant cardiac symptoms is described. The case report is discussed and 11 cases of atrial myxoma pseudovasculitis described in the literature are reviewed, emphasizing their similarities and differences. Discussion. Constitutional symptoms and cutaneous manifestations were the most common. Most of the cases showed partial response to glucococorticosteroid treatment, reinforcing the theory of the inflammatory role in its pathogenesis. Mean delayed time to diagnosis was 12.27 months. Conclusion. Atrial myxoma is a systemic vasculitis mimicker, this being difficult to diagnose in the absence of cardiac manifestations. This delay in diagnosis entails serious complications (AU)

A classic mimicker of systemic vasculitis.

BACKGROUND AND OBJECTIVE: Embolic and constitutional manifestations of intracavitary cardiac tumors are included within the classic mimickers of systemic vasculitis, especially in those in which there are no cardiac manifestations. We present a case report of atrial myxoma in which the patient only presented systemic symptoms and in whom an initial diagnostic approach of systemic vasculitis was made. We also performed a literature search of the cases described. PATIENT AND METHOD: A case report of atrial myxoma with atypical presentation manifested as a systemic disease with no concomitant cardiac symptoms is described. The case report is discussed and 11 cases of atrial myxoma pseudovasculitis described in the literature are reviewed, emphasizing their similarities and differences. DISCUSSION: Constitutional symptoms and cutaneous manifestations were the most common. Most of the cases showed partial response to glucococorticosteroid treatment, reinforcing the theory of the inflammatory role in its pathogenesis. Mean delayed time to diagnosis was 12.27 months. CONCLUSION: Atrial myxoma is a systemic vasculitis mimicker, this being difficult to diagnose in the absence of cardiac manifestations. This delay in diagnosis entails serious complications.

Limnology of cuban reservoirs III: Zaza / Limnología de los embalses cubanos III: Zaza

Studies of physical, chemical and biological variables of the pelagic community were performed during 1989 in Zaza, the largest freshwater reservoir in Cuba. The reservoir is warm-monomictic. The circulation period lasted from October to March and the water column stability was low, due to a large surface area and to a wind exposed location. Dissolved oxygen was usually below the saturation point, owing to a high load of organic matter. The low oxygen concentrations appear to have responsible for a low efficiency in the decomposition of organic matter and in denitrification. The inorganic fraction of nitrogen was always detectable in the upper circulating layer (0-12 m), whereas inorganic phosphorus was only detectable after June. Standing stock of phytoplankton was relatively low. Phytoplankton production was probably limited by light and phosphorus. Diatoms dominated during the mixing period and Cyanophyceae and Crytophyceae during stratification. For most part of the year biomass of Copepoda was higher than biomass of Cladocera and Rotatoria