El ojo: Un rompecabezas diagnóstico: Estudio observacional descriptivo y revisión / The Eye: A Diagnostic Puzzle: Descriptive observational study and review

Se comunica una serie de casos, multicéntricos de la cual participaron cinco instituciones. La muestra fue de 17 pacientes, de los cuales 11 pertenecían al Hospital Dr. J.M. Cullen. Todos consultaron por compromiso orbitario y/o periorbitario. El compromiso en hombres fue de 23.4% y un 76.6% en mujeres. La edad media en años fue de 45.4 (17-69 años). Dentro de los diagnósticos encontrados, cinco casos fueron Enfermedad Relacionada con IgG4 (ER-IgG4), dos casos de Enfermedad de Erdheim Chester (EEC), dos Xantogranuloma, dos xantelasmas, un caso de metástasis de cáncer de mama, un caso de orbitopatía tiroidea, un caso de Amiloidosis con mieloma múltiple, y tres sin diagnóstico. Se revisan los diagnósticos diferenciales encontrados.

A series of multicentric cases is reported, of which five institutions participated. The sample was of 17 patients, of which 11 belonged to our Hospital, the Dr. J.M. Cullen Hospital. All consulted for orbital and/or periorbital commitment. The commitment in men was 23.4% and 76.6% in women. The average age in years was 45.4 (17-69 years). Among the diagnoses found, five cases were IgG4-Related Disease, two cases of Erdheim Chester Disease, two Xantogranuloma, two xanthelasmas, a case of breast cancer metastases, a case of thyroid orbitopathy, a case of Amyloidosis with multiple myeloma, and three without diagnosis. Differential diagnoses found are reviewed.

Effect of surfactant concentration on the responsiveness of a thermoresponsive copolymer/surfactant mixture with potential application on "Smart" foams formulations.

HYPOTHESIS: Previous efforts to formulate smart foams composed of mixtures of PNIPAAm, a thermoresponsive uncharged polymer, and surfactants have failed because the surfactant displaces the PNIPAAm from the liquid-air interface, removing the thermal responsiveness. We hypothesized that thermoresponsive foams could be formulated with such a mixture if a charged surfactant were used in order to anchor an oppositely charged brush-type polyelectrolyte, for which PNIPAAm could be incorporated as side chains, to the interface. EXPERIMENTS: A brush-type negatively charged co-polyelectrolyte (Cop-L) with PNIPAAm as side chains was synthetized. Its mixtures with DTAB, a cationic surfactant, in aqueous solution were characterized by dynamic light scattering, surface tension and surface compression viscoelasticity measurements, as a function of both surfactant concentration and temperature. The foam stability and its responsiveness to temperature changes were studied with a homemade apparatus. FINDINGS: The Cop-L/DTAB mixtures were capable of producing thermoresponsive foams but only in a very narrow surfactant concentration (cs) range, 0.3 < cs< 1.6 mM. The responsiveness is due to a modification of the interfacial compression elasticity induced by conformational changes of the Polyeletrolyte/surfactant aggregates at the interface. This is possible only for cs < 1.6 because higher surfactant concentrations induce the polymer collapse at all temperatures, eliminating the thermal responsiveness.

Enhancement of thermoplastic starch final properties by blending with poly(ɛ-caprolactone).

Final properties of two thermoplastic corn starch matrices were improved by adding poly(ɛ-caprolactone), PCL, at 2.5, 5, and 10% w/w. One of the thermoplastic starch matrices was processed using water and glycerol as plasticizers (SG) and the other one was plasticized with a mixture of glycerol and sodium alginate (SGA). Blends were suitably processed by melt mixing and further injected. Films obtained by thermo-compression were flexible and easy to handle. Microstructure studies (SEM and FTIR) revealed a nice distribution of PCL within both matrices and also a good starch-PCL compatibility, attributed to the lower polyester concentration. The crystalline character of PCL was the responsible of the increment in the degree of crystallinity of starch matrices, determined by XRD. Moreover, it was demonstrated by TGA that PCL incorporation did not affect the thermal stability of these starch-based materials. In addition, a shift of Tg values of both glycerol and starch-rich phases to lower values was determined by DSC and DMA tests, attributed to the PCL plasticizing action. Besides, PCL blocking effect to visible and UV radiations was evident by the incremented opacity and the UV-barrier capacity of the starch films. Finally, water vapor permeability and water solubility values were reduced by PCL incorporation.

Thermoplastic starch plasticized with alginate-glycerol mixtures: Melt-processing evaluation and film properties.

Corn starch melt-processing in the presence of a commonly used plasticizer mixture (water/glycerol) and a non-conventional alternative (alginate/glycerol) was evaluated. All assayed formulations were successfully processed by melt-mixing and injected in circular probes. It was determined that all samples presented a typical viscoelastic behavior, observing a decrease in storage and loss modulus with water and alginate concentration, which facilitated samples processability. Concerning to thermal stability, it was not affected neither for water nor alginate presence. From injected probes, flexible films were obtained by thermo-compression. Films with the highest assayed water content presented a sticky appearance, whereas those containing alginate were non-tacky. Plasticizing action of water and alginate was evidenced by the occurrence of homogeneous fracture surfaces, without the presence of unmelted starch granules. Besides, the shift of glass transition temperature to lower values also corroborated the plasticizing effect of both additives. In conclusion, obtained results demonstrated the well-plasticizing action of sodium alginate on starch matrix, turning this additive into a promissory alternative to replace water during melt-processing of thermoplastic corn-starch.

Estudio piloto sobre correlación clínica, radiológica y ecográfica en pacientes con artritis reumatoidea / Pilot study on clinical, radiographic and ecographic correlation in patients with rehumatoid arthritis

El objetivo de este estudio piloto fue evaluar la correlación entre las evaluaciones clínicas, radiológica y ecográfica en pacientes con AR. Material y métodos: Estudio de corte transversal realizado en el marco de un taller de clinimetría y ecografía para médicos reumatólogos. Se incluyeron pacientes ≥ a 18 años de edad, con diagnóstico de AR. Los pacientes fueron evaluados a través de autocuestionarios validados: actividad de la enfermedad (RADAI), capacidad funcional (HAQ-A y HAQ-II) y RAPID-3; escala visual análoga (EVA) para dolor, evaluación global de la enfermedad y rigidez matinal (RM) y recuento articular (28) por dos médicos reumatólogos. Estos dos médicos también determinaron la evaluación global de la enfermedad de los pacientes (EVA). Se consignó valor de eritrosedimentación (ERS) dentro de la semana previa al examen. Se calculó el índice compuesto DAS28. Radiografías de manos y pies (en posición frente) efectuadas dentro de la semana previa al examen fueron leídas por otros dos médicos reumatólogos mediante método de Sharp modificado por van der Heijde (SvdH) y método SENS (Simplified Erosion and Narrowing Score). A todos los pacientes se les realizó ecografía articular Modo B y Doppler de poder (PD) de 12 por 5 médicos experimentados. Se determinó presencia de derrame de líquido sinovial (DS), hipertrofia sinovial (HS) y señal (PD). A la presencia de cada uno de estos hallazgos se les asignaba 1 punto y el índice ecográfico total resultaba de la suma de los puntos positivos (rango 0-36).

The aim of this pilot study was to evaluate the correlation betweenclinical, radiological and ultrasound assessments in patients withRA.Material and methods: Cross-sectional study conducted in theframework of a clinimetric and ultrasound workshop for rheumatologists.We included patients with rheumatoid arthritis (ACR1987) ≥ 18 years of age. Patients were evaluated using validatedquestionnaires: disease activity (RADAI), functional capacity (HAQ-Aand HAQ-II) and RAPID-3; visual analog scale (VAS) for pain, globalassessment of disease and morning stiffness (MS) and joint count(28) by two rheumatologists who also determined the global assessmentof the patient’s disease (VAS). Sedimentation rate (ESR)in the week before the exam was recorded. DAS28 composite indexwas calculated. Radiographs of hands and feet (front position) performedwithin one week before the examination were read by tworheumatologists using the Sharp method modified by van der Heijde(SvdH) and SENS (Simplified Erosion and Narrowing Score) method.All patients underwent joint ultrasonography B Mode and PowerDoppler (PD) of 12 joints by 5 experienced physicians. Presence ofeffusion of synovial fluid (SF), synovial hypertrophy (SH) and signal(PD) were determined. To the presence of each of these findingswere assigned 1 point and the total ultrasound index was the sumof the positive points (range 0-36).

Signo de la tecla en pacientes con artritis reumatoidea: su correlación ecográfica / Piano key sign in arthritis rheumatoid patients: ultrasound correlation

Objetivo: Evaluar ecográficamente el carpo y su quinto y sexto compartimento extensor en pacientes con artritis reumatoidea (AR), correlacionando los hallazgos con la presencia del signo clínico de la “tecla de piano”. Métodos: Se incluyeron pacientes con diagnóstico de AR que acudieron a la consulta ambulatoria entre enero y junio de 2009. Se recolectaron datos sociodemográficos, clínicos, y parámetros de actividad de la enfermedad. Se realizó examen físico a cargo de un evaluador, quien constataba la presencia del signo de la tecla. Las evaluaciones ecográficas fueron realizadas en forma ciega por un único médico el mismo día de la consulta, evaluando la presenciade sinovitis a nivel de carpo y el compromiso del quinto y sexto compartimento extensor. Resultados: Se incluyeron 34 pacientes, el 80% eran de sexo femenino y la mediana de edad fue de 56 años (RIQ: 30-84). La mediana de tiempo de evolución de la artritis fue de 114 meses (RIQ: 14-540). Se evaluaron 68 carpos observándose clínicamente la presencia de tecla cubital positiva en el 36,7%. En los carpos con signo de la tecla positivo se observó sinovitis en un 96% y en los que tenían signo de la tecla negativo, 83,7%. A nivel del sexto compartimento se evidenció tendinosis en un 16% de los pacientes con tecla positiva vs. 28% en los de tecla negativa, y tenosinovitis en un 28% vs. 14%, respectivamente. Conclusiones: Este es el primer estudio en nuestro país en correlacionar la presencia del signo de la tecla y los hallazgos ecográficosdel carpo y su quinto y sexto compartimento extensor. Los datos recolectados nos hacen suponer que no existe asociación entre la presencia del signo clínico evaluado y las manifestaciones ecográficas.

Objective: To evaluate the wrist and his fifth and sixth extensor compartments in patients with rheumatoid arthritis (RA) using ultrasound (US) and compared the findings with the “piano key sign”.Methods: Consecutive adult patients with RA who attended the outpatient clinic at the rheumatology section of our center from January to June 2009 were included. We recorded socio-demographic, clinical and disease activity data. A rheumatologist carried out a physical examination to evaluate the presence of the “piano key sign”.US assessment was performed by a single rheumatologist the same day and evaluates the presence of wrist’s synovitis and fifth and sixth extensor compartment damage. Results: 34 patients were included, 80% female, median age 56 years (IQR: 30-84). The median disease duration was 114 months (IQR: 14-540). 68 wrists were evaluated. The piano key sign wasobserved in 36.7%. In wrists with the piano key sign, US synovitis was observed in 96% and at the wrists without the sign we observedsynovitis in 83.7%. At the sixth compartment, we observed tendinosis in 16% of the patient who had the piano key sign vs. 28% without the sign, and tenosynovitis in 28% vs. 14, respectively. Conclusions: This study is the first in our country to compare thepresence of the piano key sign with the ultrasonographic findings in de wrist and his fifth and sixth extensor compartment. The data collected enables us to suppose that there is no association between the presence of the clinical sign and the ultrasonographicfindings.

Signo de la tecla en pacientes con artritis reumatoidea: su correlación ecográfica / Piano key sign in arthritis rheumatoid patients: ultrasound correlation

Objetivo: Evaluar ecográficamente el carpo y su quinto y sexto compartimento extensor en pacientes con artritis reumatoidea (AR), correlacionando los hallazgos con la presencia del signo clínico de la ¶tecla de piano÷. Métodos: Se incluyeron pacientes con diagnóstico de AR que acudieron a la consulta ambulatoria entre enero y junio de 2009. Se recolectaron datos sociodemográficos, clínicos, y parámetros de actividad de la enfermedad. Se realizó examen físico a cargo de un evaluador, quien constataba la presencia del signo de la tecla. Las evaluaciones ecográficas fueron realizadas en forma ciega por un único médico el mismo día de la consulta, evaluando la presenciade sinovitis a nivel de carpo y el compromiso del quinto y sexto compartimento extensor. Resultados: Se incluyeron 34 pacientes, el 80% eran de sexo femenino y la mediana de edad fue de 56 años (RIQ: 30-84). La mediana de tiempo de evolución de la artritis fue de 114 meses (RIQ: 14-540). Se evaluaron 68 carpos observándose clínicamente la presencia de tecla cubital positiva en el 36,7%. En los carpos con signo de la tecla positivo se observó sinovitis en un 96% y en los que tenían signo de la tecla negativo, 83,7%. A nivel del sexto compartimento se evidenció tendinosis en un 16% de los pacientes con tecla positiva vs. 28% en los de tecla negativa, y tenosinovitis en un 28% vs. 14%, respectivamente. Conclusiones: Este es el primer estudio en nuestro país en correlacionar la presencia del signo de la tecla y los hallazgos ecográficosdel carpo y su quinto y sexto compartimento extensor. Los datos recolectados nos hacen suponer que no existe asociación entre la presencia del signo clínico evaluado y las manifestaciones ecográficas.(AU)

Objective: To evaluate the wrist and his fifth and sixth extensor compartments in patients with rheumatoid arthritis (RA) using ultrasound (US) and compared the findings with the ¶piano key sign÷.Methods: Consecutive adult patients with RA who attended the outpatient clinic at the rheumatology section of our center from January to June 2009 were included. We recorded socio-demographic, clinical and disease activity data. A rheumatologist carried out a physical examination to evaluate the presence of the ¶piano key sign÷.US assessment was performed by a single rheumatologist the same day and evaluates the presence of wrists synovitis and fifth and sixth extensor compartment damage. Results: 34 patients were included, 80% female, median age 56 years (IQR: 30-84). The median disease duration was 114 months (IQR: 14-540). 68 wrists were evaluated. The piano key sign wasobserved in 36.7%. In wrists with the piano key sign, US synovitis was observed in 96% and at the wrists without the sign we observedsynovitis in 83.7%. At the sixth compartment, we observed tendinosis in 16% of the patient who had the piano key sign vs. 28% without the sign, and tenosynovitis in 28% vs. 14, respectively. Conclusions: This study is the first in our country to compare thepresence of the piano key sign with the ultrasonographic findings in de wrist and his fifth and sixth extensor compartment. The data collected enables us to suppose that there is no association between the presence of the clinical sign and the ultrasonographicfindings.(AU)