Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 2 de 2
Filtrar
Mais filtros










Base de dados
Intervalo de ano de publicação
1.
Cir Cir ; 87(1): 96-100, 2019.
Artigo em Espanhol | MEDLINE | ID: mdl-30600810

RESUMO

BACKGROUND: Langerhans cell histiocytosis is a rare disease in the adult, predominates in the pediatric age and is more common in men than in women. The sites of greater affection are the long bones, followed by the bones of the skull. Patients usually have symptoms related to the site of affection, usually polyostotic lesions, monostotic lesions occur less frequently. The study of choice and treatment depends on the site affected, in the skull the main one is the magnetic resonance and the treatment is the surgical excision of the lesion. CLINICAL CASE: A 29-year-old female patient who entered the hospital due to a non-painful, rapidly growing, progressive tumor on the frontal region of the skull. Physical examination revealed a rounded mass of approximately 5 cm in diameter in the left, non-painful, non-painful, left-frontoparietal region. Magnetic resonance imaging of the skull showed a lytic lesion in the frontal bone. It was surgically excised with clean edges; titanium plate was placed. Histopathological diagnosis was histiocytosis of Langerhans cells. CONCLUSIONS: It is a rare case, with a patient of an uncommon age of presentation, absence of metastasis by means of study protocol and due to the monostotic presentation improves the prognosis for this patient.


ANTECEDENTES: la histiocitosis de células de Langerhans es una enfermedad rara en el adulto, que predomina en la edad pediátrica, y es más común en los hombres que en las mujeres. Los sitios de mayor afectación son los huesos largos, seguidos de los huesos del cráneo. Suele cursar con sintomatología relacionada con el sitio de afectación. Por lo general son lesiones poliostóticas; las lesiones monostóticas se presentan con menor frecuencia. El estudio de elección y el tratamiento dependen del sitio afectado; en el cráneo, el principal es la resonancia magnética, y el tratamiento es la escisión quirúrgica de la lesión. CASO CLÍNICO: Mujer de 29 años que ingresó al hospital debido a una tumoración no dolorosa de crecimiento rápido y progresivo sobre la región frontal del cráneo. A la exploración física se observó una masa redondeada, de aproximadamente 5 cm de diámetro, en la región frontoparietal izquierda, no dolorosa, de consistencia blanda, no móvil. La resonancia magnética de cráneo mostró una lesión lítica en el hueso frontal. Se extirpó quirúrgicamente con bordes limpios y se colocó una malla de titanio. El diagnóstico histopatológico fue de histiocitosis de células de Langerhans. CONCLUSIONES: Se trata de un caso poco frecuente, en una paciente de una edad no común de presentación, con ausencia de metástasis por medio de protocolo de estudio, y debido a la presentación monostótica mejora el pronóstico para esta paciente.


Assuntos
Doenças Ósseas , Osso Frontal , Histiocitose de Células de Langerhans , Adulto , Doenças Ósseas/diagnóstico , Doenças Ósseas/cirurgia , Feminino , Histiocitose de Células de Langerhans/diagnóstico , Histiocitose de Células de Langerhans/cirurgia , Humanos
2.
Polymer (Guildf) ; 123: 121-127, 2017 Aug 11.
Artigo em Inglês | MEDLINE | ID: mdl-29200507

RESUMO

A major challenge in developing drug-releasing electrospun nanofibers is obtaining long-term drug release over many weeks with no burst release of drug. Here, we present new methods capable of prolonging the diffusive release of small molecule drugs from electrospun poly-L-lactic acid (PLLA) nanofibers. The methods focus on removal of retained electrospinning solvent through fiber heating, maintaining fibers in a laboratory setting, or a combination of these methods. These post-fabrication methods altered the release characteristics of a model small molecule drug, 6-aminonicotinamide (6AN), from PLLA fibers. Specifically, untreated fibers released 6AN over 9 days, and fibers that underwent a combined treatment of maintenance in a laboratory setting and heating released 6AN over 44 days. The unique and simple method presented here prolongs diffusive release of a small molecule drug from electrospun fibers and has potential to assist in lengthening small molecule drug release from a variety of polymeric nanomaterials.

SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...