Tumor miofibroblástico inflamatorio tras cáncer de mama. Un reto en el diagnóstico diferencial. Revisión de la literatura / Myofibroblastic tumour after breast cancer. A challenge in differential diagnosis. Literature review

Introducción El tumor miofibroblástico inflamatorio (TMI) es un tumor mesenquimal benigno, con potencial de transformación maligna. Puede aparecer en múltiples órganos (pulmón, intestino…), siendo la mama una ubicación excepcional. Hallazgos clínicos: Se presenta el caso de una paciente de 53 años que tiene como antecedente un carcinoma de mama derecha, tipo ductal infiltrante G2, luminal A. Fue tratada con cirugía, radioterapia y quimioterapia, consiguiéndose curación. Transcurridos nueve años, reinició estudio por aparición de una tumoración sospechosa de 3 cm en la misma mama. Diagnósticos principales, intervenciones terapéuticas y resultados: Se realizó una biopsia con aguja gruesa. El estudio anatomopatológico no fue concluyente, por lo que se decidió realizar una exéresis de la lesión. Los resultados del análisis anatomopatológico fueron: tumor miofibroblástico inflamatorio. La paciente no precisó tratamiento adyuvante posterior y se encuentra libre de enfermedad actualmente. Conclusión: El TMI es una entidad poco frecuente, con pocos casos publicados hasta la fecha. Representa un reto diagnóstico, tanto a nivel radiológico como anatomopatológico. A pesar de ser una neoplasia con comportamiento benigno, está indicado realizar una exéresis amplia y completa de la lesión, ya que en algunos casos se ha descrito su recurrencia, y de forma excepcional se han descrito casos de metastatización. El conocimiento de su existencia y comportamiento es clave a la hora orientar el diagnóstico y tratamiento.(AU)

Introduction: Inflammatory myofibroblastic tumour (IMT) is a benign mesenchymal tumour, with potential for malignant transformation. It can appear in multiple organs (lung, intestine…), the breast being an exceptional location. Clinical findings: We present the case of a 53-year-old female patient with a history of right breast ductal infiltrating carcinoma, G2, Luminal A. She was treated with surgery, radiotherapy, and chemotherapy, achieving complete response. Nine years later, she was re-examined due to the appearance of a new suspicious tumour in the same breast, which measured three centimetres. Main diagnosis, therapeutic intervention, and outcomes: A core needle biopsy was performed. The anatomopathological study was inconclusive, so it was decided to perform total excision of the lesion. The results of the anatomopathological analysis were: Inflammatory Myofibroblastic Tumour. The patient did not require further adjuvant treatment and is disease free at present. Conclusions: IMT is a rare entity, with few cases published to date. It represents a diagnostic challenge, both radiologically and anatomopathologically. Although it is a tumour with benign behaviour, wide and complete excision of the lesion is indicated, as its recurrence has been described in some cases, as well as some exceptional cases of metastatisation. Knowledge of its existence and behaviour is a key factor in guiding diagnosis and treatment.(AU)

Bisphosphonate-related osteonecrosis. Application of adipose-derived stem cells in an experimental murine model.

BACKGROUND: Bisphosphonate-related osteonecrosis of the jaw is a pathological condition without effective established treatment and preventive strategies. The aim of this study was to analyse the effect of adipose-derived stem cells (ASC) in an experimental murine model of osteonecrosis. MATERIAL AND METHODS: 38 Wistar rats were injected intraperitoneally with zoledronic acid. After treatment, upper jaw molars were extracted. The animals were randomly assigned to one of two groups. In the control group, saline solution was applied over the alveolar sockets after the tooth extractions. In the treatment group, ASCs were applied instead of saline solution. The control and treatment groups were subdivided based on the time of euthanasia. A clinical and histological analysis was performed. RESULTS: The presence of osteonecrosis in alveolar bone was observed in a similar distribution in both groups. In the ASC-treated group, new bone formation was greater than in controls. CONCLUSION: In this study, application of ASCs showed greater new bone formation in an osteonecrosis-like murine model. Previous inhibited post-extraction bone remodelling could be reactivated, and these findings appeared to be secondary to implantation of ASCs.

Comparación de resultados posterior a la transferencia electiva de embrión único euploide en ciclos frescos vs criopreservados / Results after elective single embryo transfer: Fresh euploid embryo transfer versus frozen-thawed transfer cycles

Resumen OBJETIVO: analizar las tasas de implantación y embarazo en ciclos de fertilización in vitro con transferencia electiva de un solo blastocisto, con control del factor embriónico mediante transferencia de embriones euploides. MATERIALES Y MÉTODOS: estudio retrospectivo de pacientes atendidas entre los años 2010 a 2015 en un centro privado, en protocolo de fertilización in vitro y que tuvieron, por lo menos, un embrión euploide disponible para transferencia. Para fines de estudio las pacientes se dividieron en dos grupos: 1) transferencia de embriones frescos y 2) embriones desvitrificados. Las variables categóricas se analizaron con χ2 y prueba exacta de Fisher; las variables continuas con t de Student. Se estableció significación estadística con un valor de p < 0.05. Para el análisis estadístico se usó SAS-STAT versión 9.4. RESULTADOS: se incluyeron 637 ciclos (frescos: 243 vs criopreservados: 394). La tasa de embarazo fue de 75.5% (n = 289) vs 66.3% (n = 159), embarazo clínico 62.5% (n = 235) vs 53.1% (n = 127) que fue estadísticamente significativo a favor de los ciclos criopreservados. Las tasas de embarazo múltiple fueron bajas (1.7 vs 1.6%) en ambas cohortes. CONCLUSIONES: la transferencia de un solo embrión disminuye significativamente la incidencia de embarazos múltiples y la morbilidad materna y neonatal. El mejor pronóstico en ciclos de fertilización in vitro homólogos se consigue con la transferencia de un solo embrión genéticamente equilibrado, en un ciclo posterior de preparación endometrial sintética o natural.

Abstract OBJECTIVE: To analyze the implantation and pregnancy rates in cycles of in vitro fertilization with elective transfer of a single blastocyst, with control of the embryonic factor by transfer of euploid embryos. MATERIALS AND METHODS: Retrospective analysis who included patients that underwent IVF and had at least one euploid embryo available for transfer between 2010 and 2015 on a single academic private practice. Cohorts were segregated in fresh embryo transfers (ET) vs frozen/thawed ET. Categorical variables were analyzed with χ2 and Fisher test when appropriate. Continuous variables were analyzed with Students t test. P value < 0.5 was established as statistically significant. SAS/STAT 9.4 was used for analysis. RESULTS: Six hundred and thirty-seven euploid SETs cycles (fresh cycle: n = 243; frozen/thaw cycle: n = 394) were identified. Pregnancy (75.5% (n=289) vs 66.3% (n = 159)) and clinical pregnancy rates (PR) (62.5% (n = 235) vs 53.1% (n = 127)) were statistically higher in the frozen/thaw cycles. Low rates of multiple pregnancies (1.7 and 1.6%) were observed in both cohorts. CONCLUSIONS: In one of the largest studies to date, a euploid SET during a frozen/thaw cycle showed significantly improved pregnancy and clinical PR compared to embryo transfer in fresh cycles. Single embryo transfer significantly reduces the incidence of multiple gestation and improves maternal and neonatal outcomes. An optimal outcome is achieved by the performance of a SET in FET cycles.

Two cases of overlap severe cutaneous adverse reactions to benznidazole treatment for asymptomatic Chagas disease in a nonendemic country.

Chagas disease is a parasitosis endemic to South America. It is normally treated with benznidazole as first choice, which has been associated with numerous cutaneous reactions. However, very few benznidazole-associated severe cutaneous adverse reactions have been reported to date. The rise of Chagas disease in nonendemic countries represents a growing public health challenge. We report two patients who met the criteria for drug reaction with eosinophilia and systemic symptoms syndrome and Stevens-Johnson syndrome/toxic epidermal necrolysis according to the RegiSCAR scoring systems. They were thus deemed overlapping cases, with a lymphocyte transformation test positive for benznidazole. Both required intensive care unit admission and both survived. Considering the rising application of this drug for trypanosomiasis in immigrant populations, clinicians should be aware of this newly reported, potentially life-threatening risk.

Factores relacionados con la cirugía secundaria en la reconstrucción mamaria autóloga con tejido libre abdominal / Secondary surgery related factors in autologous breast reconstruction using abdominal free tissue

La reconstrucción mamaria con colgajo libre abdominal se ha convertido en la opción terapéutica de elección en nuestro centro hospitalario cuando se necesita abundante cantidad de tejido. La culminación de este tipo de reconstrucción requiere un número variable de procedimientos auxiliares de retoque. Revisamos las historias de las pacientes sometidas en nuestro centro a reconstrucción mamaria con colgajo libre abdominal entre enero de 2010 y diciembre de 2013. El criterio de inclusión fue la reconstrucción del pezón como última cirugía. Las pacientes fueron estratificadas atendiendo a factores relacionados con la reconstrucción microquirúrgica y la existencia de radioterapia adyuvante. Analizamos el número y tipo de procedimientos y cirugías de retoque, así como el tiempo transcurrido hasta completar el proceso de reconstrucción. En total, recogimos 68 pacientes reconstruidas con colgajo libre abdominal. De ellas, 31 (45,6%) completaron la reconstrucción mamaria. La media de procedimientos fue de 3,2 por paciente, con una media de 2,4 tiempos quirúrgicos y un tiempo medio de 15,5 meses hasta la reconstrucción del pezón. El momento de la reconstrucción, la bilateralidad, el tratamiento con radioterapia y la presencia de complicaciones tempranas del colgajono se relacionaron con diferencias estadísticamente significativas en la tasa de cirugía secundaria. Los colgajos libres abdominales necesitan frecuentemente cirugías secundarias para mejorar el resultado y terminar la reconstrucción. Remarcamos la necesidad de planificar la reconstrucción desde el primer tiempo quirúrgico para disminuirla necesidad de cirugías de retoque y el tiempo hasta completarla reconstrucción mamaria (AU)

Breast reconstruction using abdominal free flaps has become the therapeutic choice at our center when a lot of tissueis needed, The completion of this reconstructive technique requires a variable number of ancillary procedures. Patients who underwent breast reconstruction with abdominal free flap at our center between January 2010 and December2013 were reviewed. The inclusion criterion was completion to nipple reconstruction. The patients were stratified attending to microsurgical reconstruction related factors and adjuvant radiotherapy. Number and sort of procedures and surgeries, and total elapsed time to complete the reconstruction were analyzed. Sixty-eight patients underwent reconstruction using abdominal free flap; 31 (45.6%) completed breast reconstruction. The average of procedures, surgical steps and elapsed time was3.2, 2.4 and 15.5 months respectively. Surgical time and bilateral procedures, treatment with radiotherapy and early flap complications were not related to statistically significant differences in secondary surgery rates. Abdominal free flaps often need secondary surgeries to improve the result and finish the reconstruction. We remark the necessity of planning the reconstruction since first surgical time to diminish the secondary surgeries and the elapsed time until completion of breast reconstruction (AU)

Criterios en la selección de pacientes para optimizar resultados en liposucción asistida por láser de abdomen y flancos: análisis de 340 cirugías / Patient selection criteria to optimize results in laser-assisted liposuction of the abdomen and flanks: analysis of 340 surgeries

El objetivo de nuestro estudio es valorar mediante ecografía y análisis estadístico la respuesta a la liposucción asistida por láser en abdomen y flancos. Para ello, se tuvo en cuenta la disminución del tejido adiposo, la retracción cutánea y el grado de satisfacción de las pacientes con los resultados. Realizamos un estudio retrospectivo sobre 340 cirugías en pacientes multíparas mayores de 40 años, con o sin diástasis de rectos, que rechazaron la abdominoplastia con lipectomía. Las intervenciones se efectuaron mediante liposucción a respectivamente en 924 y 9/5 11111, bajo sedo-analgesia y con anestesia tumescente. Los láseres se programaron para emisión en modo continuo, actuando al unísono con potencia de 20 W hasta alcanzar un promedio de entre 10 a 12 kJ de energía acumulada para los flancos, y de entre 12 a 18 kJ para el abdomen. La valoración subjetiva y objetiva se realizó mediante escala GAIS (Global Aesthetic Improvement Scale). Se tomaron fotografías antes, 1 y 6 meses después de la intervención. En abdomen se realizaron ecografías antes y 6 meses después de la cirugía, y se empleó t de Student como test de contraste para el estudio analítico. En 60 pacientes seleccionados aleatoriamente como muestra representativa se realizaron fotografías digitales de la superficie de la piel a fin de valorar comparativamente por programa de ordenador la textura-flacidez de la condición del tejido antes, 1 y 6 meses después de la cirugía. En ninguno de los resultados se observó isquemia y/o quemaduras. La disminución del tejido adiposo, según las ecografías, fue estadísticamente significativa (p<0,05) comparativamente a los 6 meses del tratamiento. La valoración de las fotografías antes y 6 meses después de la cirugía por un médico ajeno al estudio, al igual que la textura-flacidez cutánea, fue Buena o Muy Buena. La valoración subjetiva por cuestionarios de escala GAIS alcanzó un 57,1% (194 pacientes) al sumar los resultados Buenos y Muy Buenos. En cambio, la valoración objetiva por el médico fue sensiblemente superior, un 74% (252 pacientes). En conclusión, según los estudios realizados creemos que la liposucción asistida por láser es una técnica eficaz y reproducible, que obtiene notables resultados cuando las pacientes presentan depósitos de grasa localizada y no sudominales como consecuencia de partos múlti-sufren diástasis de los rectos abdominales como consecuencia de partos múltiples. También es importante que, de forma ideal, las pacientes no presenten un índice de masa grasa corporal (BMI) superior a 26 para predecir y obtener óptimos resultados (AU)

Ultrasound and statistical analysis of results of laser-assisted liposuction of the abdomen and flanks have been evaluated. Decrease in fat tissue, skin retraction and patient satisfaction with results have all been taken into consideration. This retrospective study corresponds to 340 surgeries, done on multiparous patients over 40 years age, with and without abdominal recti muscle diastasis that rejected going through abdominal lipectomy. Surgeries were carried out by laser assisted liposuction with two Diode lasers emitting at 924 and 975 nm, operating simultaneously, performed under sedation and analgesia, and injecting tumescent anaesthesia. Lasers were programmed for emission in continuous mode with both systems operating at a power of 20W, reaching a total mean accumulated energy of between 10 and 12 kJ for flanks, and between 12 and 18 kJ for the abdomen. Subjective and objective evaluation was carried out using a GAIS scale (Global Aesthetic Improvement Scale). Photographs were taken before, 1 and 6 months after procedures. For the abdomen ultrasound examination were done before and 6 months after surgery, and Student's t-test was implemented for the statistical analysis. In 60 patients, randomly chosen as a representative sample, digital photographs of the skin surface were taken in order to comparatively evaluate skin texture-laxity condition, before, 1 and 6 months after surgery with the aid of a computer programme. No ischemia or burns were observed in any patient. According to ultrasound exam, decrease in fat tissue was statistically significant (p<0,05) when compared to 6 months after surgery. Evaluation by an independent doctor to the study, before and 6 months after photographs as well as the skin texture-laxity, were Good and Very Good. Subjective results obtained through questionnaires using GAIS scale reached 57,1% (194 patients) satisfied with results, totalling the Good and Very Good results. However, the objective evaluation, done by the Doctor, was significantly better regarding results obtained, 74% (252 patients). In conclusion, laser assisted liposuction is an effective and reproducible technique that obtains notable results when patients presented localized fat deposits and did not suffer diastasis due to multiple pregnancies. It is also important that, ideally, patients selected should not have a BMI of over 26 in order to obtain optimal results (AU)

Cáncer de mama ectópico axilar / Ectopic axillary breast cancer

La presencia de tejido mamario ectópico ocurre en el 2-6% de la población general, siendo la localización más frecuente en la región axilar. El tejido mamario ectópico está sometido a las mismas influencias hormonales y riesgos de enfermedad, incluyendo carcinomas, que las mamas anatómicas. La incidencia de carcinoma en tejido ectópico es del 0,3% de todos los cánceres de mama y la localización más frecuente es la axila. El tratamiento debe seguir las mismas recomendaciones que el cáncer de mama, con igual estadio TNM

Ectopic breast tissue occurs in 2-6% of the general population. The most frequent location is the axillary region. Ectopic breast tissue is subject to the same hormonal influences and risk of disease, including carcinoma, as anatomical breast. The incidence of carcinoma in ectopic tissue is approximately 0.3% of all breast cancers. Treatment should follow the same recommendations as those for breast tumors with the same tumor-node-metastasis stage

Cobalt-56 γ-ray emission lines from the type Ia supernova 2014J.

A type Ia supernova is thought to be a thermonuclear explosion of either a single carbon-oxygen white dwarf or a pair of merging white dwarfs. The explosion fuses a large amount of radioactive (56)Ni (refs 1-3). After the explosion, the decay chain from (56)Ni to (56)Co to (56)Fe generates γ-ray photons, which are reprocessed in the expanding ejecta and give rise to powerful optical emission. Here we report the detection of (56)Co lines at energies of 847 and 1,238 kiloelectronvolts and a γ-ray continuum in the 200-400 kiloelectronvolt band from the type Ia supernova 2014J in the nearby galaxy M82. The line fluxes suggest that about 0.6 ± 0.1 solar masses of radioactive (56)Ni were synthesized during the explosion. The line broadening gives a characteristic mass-weighted ejecta expansion velocity of 10,000 ± 3,000 kilometres per second. The observed γ-ray properties are in broad agreement with the canonical model of an explosion of a white dwarf just massive enough to be unstable to gravitational collapse, but do not exclude merger scenarios that fuse comparable amounts of (56)Ni.

Testing the model of caudo-rostral organization of cognitive control in the human with frontal lesions.

The cascade model of cognitive control, mostly relying on functional neuroimaging studies, stipulates that the lateral frontal cortex (LFC) is organized as a cascade of executive processes involving three levels of cognitive control, implemented in distinct LFC areas from the premotor to the anterior prefrontal regions. The present experiment tested this model in patients with LFC lesions and studied the hierarchy of executive functions along the caudo-rostral axis, i.e. the respective roles of the different LFC areas in the control of behavior. Voxel-based lesion-symptom mapping and region of interest group analyses were conducted in 32 patients with focal LFC lesions who performed cognitive tasks assessing the cascade model. We first showed that three different LFC areas along the caudo-rostral axis subserved three distinct control levels, whose integrity is necessary for adaptive behavior. Second, we found that prefrontal cognitive control has an asymmetric organization: higher control processes involving more anterior prefrontal regions rely on the integrity of lower control processes in more posterior regions, while lower control processes can operate irrespective of the integrity of higher control processes. Altogether, these findings support a caudo-rostral cascade of executive processes from premotor to anterior prefrontal regions.