[Complication in replacement of unconventional tumor prosthesis]. / Complicación en recambio de prótesis tumoral no convencional.

Bone metastases from a primary cancer of any part of the body are the most common form of malignant bone tumor constituting approximately 70% of them. The proximal femur being the most common extra-vertebral location for its location; 10% of patients have some pathological fracture, which is a serious complication. Currently the objectives of the treatment of a pathological fracture are: resection with adequate oncological margins, that the patient survives the surgical intervention, maintain the functionality, that the placed implant has a longer life time than the patient. The use of non-conventional hip prostheses is an excellent treatment option fulfilling the 4 established objectives, therefore this case is presented in which a right bipolar hip hemiarthroplasty is performed with a non-conventional prosthesis where it was treated with a described complication and the surgery of resolution.

Las metástasis óseas de un cáncer primario de cualquier parte del cuerpo son la forma más común de tumor óseo maligno constituyendo aproximadamente 70% de ellos. Siendo el fémur proximal la localización extravertebral más común para su localización; 10% de los pacientes presentan alguna fractura patológica, lo que es una grave complicación. En la actualidad, los objetivos del tratamiento de una fractura patológica son: resección con márgenes oncológicos adecuados, que el paciente sobreviva la intervención quirúrgica, mantener la funcionalidad, que el implante colocado tenga un tiempo de vida más largo que el del paciente. El uso de prótesis de cadera no convencionales es una excelente opción de tratamiento cumpliendo los cuatro objetivos establecidos, por ello se presenta este caso en el que se realiza una hemiartroplastía de cadera derecha bipolar con una prótesis no convencional donde se cursa con una complicación y se realiza la cirugía de resolución.

[Correlation of cutaneous reactivity between allergenic extracts of Dermatophagoides pteronyssinus and Dermatophagoides farinae with Blomis tropicalis in patients with allergic rinitis and asthma]. / Correlación de reactividad cutánea entre extractos alergénicos de Dermatophagoides pteronyssinus y Dermatophagoides farinae, con Blomia tropicalis en pacientes con rinitis alérgica y asma.

BACKGROUND: There are documented molecular homologies between mites from the same group, but intergroup characteristics are not. Although mites share the same taxonomic order, there are species antigenically distinct. At the present we dont know clearly the differences in cutaneous reactivity among several house dust mites species. OBJETIVE: to estimate the correlation of skin reactivity to Dermatophagoides pteronyssinus and Dermatophagoides farinae antigens with that of Blomia tropicalis in patients with allergic rhinitis and asthma. METHODS: a cross sectional, observational, prolective and interpretive study was performed in patients of both genders, aged 2 to 58 with allergic rhinitis and asthma. All patients underwent skin prick tests with allergenic extracts. RESULTS: One hundred and ten patients were included, with an age average of 24.1 years; 50% were males. There were positive skin tests with mites in 59% of the patients, 24.5% for Blomia t; 10% for D. pteronyssinus plus Blomia t. and 7.29% for D. farinae plus Blomia t. The correlation of the skin reactivity between Dermatophagoides pteronyssinus and Blomia tropicalis (r= 0.36) and between Dermatophagoides farinae and Blomia tropicalis (r= 0.27), was not significant in both cases. CONCLUSIONS: We found that most patients with allergic rhinitis and asthma showed positive skin tests with the mite extracts tested. There is a weak correlation between both species of Dermatophagoides and Blomia tropicalis.