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Introducción: El pseudotumor fibroso calcificado es una lesión benigna, con pocos casos de localización peritoneal y mesentérica descritos en la población pediátrica. Su curso es principalmente asintomático, por lo cual el diagnóstico corresponde en su mayoría a hallazgos incidentales. Caso clínico: Se presenta el caso de una paciente de 9 años con dolor abdominal y hallazgo de masa entra-abdominal en tomografía de abdomen. El estudio histopatológico realizado estableció el diagnóstico de pseudotumor fibroso calcificado, por lo que se llevó a resección programada de la masa mediante laparotomía. El seguimiento de la paciente fue durante un año, sin evidencia de recurrencias en ecografía. Comentarios: Se discute la aproximación diagnóstica y terapéutica en esta paciente comparado con lo descrito en la literatura
Introduction: Calcifying fibrous pseudotumor is a rare benign lesion with few peritoneal and mesenteric cases in pediatric population described. Its course is mainly asymptomatic, which is why diagnosis corresponds mostly to incidental findings. Clinical case: Authors present the case of a 9-year-old patient with abdominal pain, and intra-abdominal mass finding in abdominal tomography. The histopathological study realized established diagnosis of calcifying fibrous pseudotumor, which is why programmed resection of the mass was performed by laparotomy. Follow-up was performed during one year, without evidence of recurrences through ecography. Comments: Authors discuss the diagnostic and therapeutic approach in this patient compared to that described in the literature
Assuntos
Humanos , Feminino , Criança , Mesentério/diagnóstico por imagem , Neoplasias de Tecido Fibroso/diagnóstico por imagem , Dor Abdominal/etiologia , Mesentério/patologia , Mesentério/cirurgia , Achados Incidentais , Neoplasias Abdominais/diagnóstico por imagem , Neoplasias Abdominais/cirurgia , Imuno-HistoquímicaRESUMO
A case of pseudosyst of the pancreas is reported, demonstrating the successful use of marsupialization. Because of the relative rarity of this condition, special attention is called to the ease with which it can be mistaken for other more common causes of encysted fluids, and to the special means for differentiating it.
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We report here the determination of a new potential energy surface for the electronic ground state of the H2Te molecule by fitting to an extensive set of very recent experimental spectroscopic data (see J.-M. Flaud, P. Arcas, H. Burger, O. Polanz, and L. Halonen, J. Mol. Spectrosc. 183, 310-335 (1997), and references therein) by means of the MORBID (Morse Oscillator Rigid Bender Internal Dynamics) computer program. The fitting to all 1111 input data (involving rotation-vibrational states with J = 10) had a standard deviation of 0.18 cm-1 and was obtained by varying 14 parameters. With the new potential energy function, the rotation-vibration energies of H2130Te have been calculated with the MORBID program. In particular, we have calculated the rotational energy manifolds for J = 40 in the lowest vibrational states. Compared to previous potential energy functions for H2Te, the new function has substantially improved the reproduction of the rotational spacings in the excited vibrational states. An important aim of the present work is the further characterization of the anomalous "fourfold cluster effect" (i.e., the formation of four-member groups of nearly degenerate rotation-vibration energies at high rotational excitation) exhibited by the energy levels of H2Te. Comparison of our theoretical results with the experimental results of J.-M. Flaud, M. Betrencourt, P. Arcas, H. Burger, O. Polanz, and W. J. Lafferty (1997, J. Mol. Spectrosc. 182, 396-420) provides conclusive evidence for the existence of so-called Type II clusters (clusters formed by coalescence of two energy doublets belonging to two different vibrational states) in the nu1/nu3 vibrational states of H2130Te. Copyright 1997 Academic Press. Copyright 1997Academic Press
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We report here an ab initio investigation of the cluster effect (i.e., the formation of four-member groups of nearly degenerate rotation-vibration energy levels at higher J and Ka values) in the H2Po molecule. The potential energy function has been calculated ab initio for a total of 143 molecular geometries by means of the CCSD(T) method, using an averaged relativistic effective potential for Po in conjunction with a newly optimized basis set. The values of the potential energy function obtained cover the region up to around 5000 cm-1 above the equilibrium energy. On the basis of the ab initio potential, the rotation-vibration energies of H2209Po have been calculated with the MORBID (Morse oscillator rigid bender internal dynamics) Hamiltonian and computer program. In particular, we have calculated the rotational energy manifolds for J = 40 in the vibrational ground state. We find that the formation of fourfold clusters in H2Po is very similar to that in H2Te. Copyright 1997 Academic Press. Copyright 1997Academic Press