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        "resumen" => "<p class="elsevierStyleSimplePara elsevierViewall">We assessed the clinicopathological features of solitary fibrous tumors of the pleura in a case series comprising 30 patients &#40;20 women&#44; 66&#46;6&#37;&#41; with a mean age of 58&#46;39 years&#46; Forty-five percent of the cases were asymptomatic&#46; In 70&#37; of the cases the tumors arose in the visceral pleura&#46; Twenty percent presented multiple tumors&#44; a finding that was associated with intrapulmonary localization and malignant behavior &#40;<span class="elsevierStyleItalic">P</span>&#60;&#46;0001&#41; Histology revealed low cell density in 15&#37; of the cases&#44; moderate density in 50&#37;&#44; and high density in 35&#37;&#59; further findings showed atypia in 45&#37; of the cases&#44; necrosis in 25&#37;&#44; and hemorrhage in 15&#37;&#46; More than 4 mitoses per 10 high-power fields were noted in 30&#37; of the cases&#46; Immunohistochemistry results were positive for vimentin in all cases&#59; cells were CD34<span class="elsevierStyleSup">&#43;</span> in 85&#37; of the cases&#44; BCL2<span class="elsevierStyleSup">&#43;</span> in 65&#37;&#44; and CD99<span class="elsevierStyleSup">&#43;</span> in 40&#37;&#46; Findings for keratin and protein S100 were negative in all cases&#46; Malignant biological behavior &#40;local recurrence and metastasis&#41; was observed in 4 cases&#44; 2 of which were CD34<span class="elsevierStyleSup">&#8722;</span>&#46;</p><p class="elsevierStyleSimplePara elsevierViewall">Solitary fibrous tumors of the pleura are uncommon neoplasms with unpredictable biological behavior&#59; follow-up should therefore be based on early detection of recurrence or metastasis&#46;</p>"
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        "resumen" => "<p class="elsevierStyleSimplePara elsevierViewall">Hemos evaluado las caracter&#237;sticas clinicopatol&#243;gicas del tumor fibroso solitario pleural en una serie de 30 casos&#46; El 70&#37; de los pacientes eran mujeres&#46; El promedio de edad fue de 58&#44;39 a&#241;os&#46; El 45&#37; de los casos fueron asintom&#193;ticos&#46; La localizaci&#243;n m&#225;s frecuente fue la pleura visceral &#40;70&#37;&#41;&#46; En el 20&#37; de los casos se observaron tumoraciones m&#250;ltiples y se asociaron a localizaci&#243;n intrapulmonar &#40;p &#60; 0&#44;0001&#41;&#46; His-tol&#243;gicamente mostraron densidad celular escasa en el 15&#37; de los casos&#44; moderada en el 50&#37; e intensa en el 35&#37;&#59; atipia en el 45&#37;&#59; necrosis en el 25&#37;&#59; hemorragia en el 15&#37;&#44; y mitosis mayor de 4 por 10 campos en el 30&#37;&#46; La inmuhistoqu&#237;-mica mostr&#243; positividad para vimentina &#40;100&#37;&#41;&#44; CD34 &#40;85&#37;&#41;&#44; BCL2 &#40;65&#37;&#41; y CD99 &#40;40&#37;&#41;&#44; y negatividad en el 100&#37; de los casos para queratinas y la prote&#237;na S100&#46; Cuatro pacientes presentaron un comportamiento biol&#243;gico maligno &#40;recurrencia local y met&#225;stasis&#41;&#59; en 2 de ellos el CD34 hab&#237;a sido negativo&#46;</p><p class="elsevierStyleSimplePara elsevierViewall">El tumor fibroso solitario pleural es una neoplasia poco com&#250;n de comportamiento biol&#243;gico impredecible&#44; por lo que el seguimiento debe centrarse en la detecci&#243;n precoz de la recurrencia o de met&#193;stasis&#46;</p>"
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Vol. 42. Issue 2.
Pages 96-99 (February 2006)
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Vol. 42. Issue 2.
Pages 96-99 (February 2006)
Case Report
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Clinicopathological Features of Solitary Fibrous Tumors of the Pleura: a Case Series and Literature Review
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N. Sánchez-Moraa,b,
Corresponding author
histonora@yahoo.es

Correspondence: Dra. N. Sánchez-Mora. Departamento de Anatomía Patológica. Hospital General Universitario Gregorio Marañón. C/Dr. Esquerdo, 46. 28007. España
, M. Cebollero-Presmanesa, V. Monroyc, L. Carretero-Albiñanaa, M. Herranz-Aladroa, E. Álvarez-Fernándeza
a Servicio de Anatomía Patológica. Hospital General Universitario Gregorio Marañón, Madrid, Spain
b LABIEMET, Universidad de Los Andes, Mérida, Venezuela
c Hospital de Especialidades Centro Médico Nacional La Raza, México DF, Mexico
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We assessed the clinicopathological features of solitary fibrous tumors of the pleura in a case series comprising 30 patients (20 women, 66.6%) with a mean age of 58.39 years. Forty-five percent of the cases were asymptomatic. In 70% of the cases the tumors arose in the visceral pleura. Twenty percent presented multiple tumors, a finding that was associated with intrapulmonary localization and malignant behavior (P<.0001) Histology revealed low cell density in 15% of the cases, moderate density in 50%, and high density in 35%; further findings showed atypia in 45% of the cases, necrosis in 25%, and hemorrhage in 15%. More than 4 mitoses per 10 high-power fields were noted in 30% of the cases. Immunohistochemistry results were positive for vimentin in all cases; cells were CD34+ in 85% of the cases, BCL2+ in 65%, and CD99+ in 40%. Findings for keratin and protein S100 were negative in all cases. Malignant biological behavior (local recurrence and metastasis) was observed in 4 cases, 2 of which were CD34.

Solitary fibrous tumors of the pleura are uncommon neoplasms with unpredictable biological behavior; follow-up should therefore be based on early detection of recurrence or metastasis.

Key words:
Solitary fibrous tumor
Pleura
Biological behavior

Hemos evaluado las características clinicopatológicas del tumor fibroso solitario pleural en una serie de 30 casos. El 70% de los pacientes eran mujeres. El promedio de edad fue de 58,39 años. El 45% de los casos fueron asintomÁticos. La localización más frecuente fue la pleura visceral (70%). En el 20% de los casos se observaron tumoraciones múltiples y se asociaron a localización intrapulmonar (p < 0,0001). His-tológicamente mostraron densidad celular escasa en el 15% de los casos, moderada en el 50% e intensa en el 35%; atipia en el 45%; necrosis en el 25%; hemorragia en el 15%, y mitosis mayor de 4 por 10 campos en el 30%. La inmuhistoquí-mica mostró positividad para vimentina (100%), CD34 (85%), BCL2 (65%) y CD99 (40%), y negatividad en el 100% de los casos para queratinas y la proteína S100. Cuatro pacientes presentaron un comportamiento biológico maligno (recurrencia local y metástasis); en 2 de ellos el CD34 había sido negativo.

El tumor fibroso solitario pleural es una neoplasia poco común de comportamiento biológico impredecible, por lo que el seguimiento debe centrarse en la detección precoz de la recurrencia o de metÁstasis.

Palabras clave:
Tumor fibroso solitario
Pleura
Comportamiento biológico
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