H-scan analysis of thyroid lesions.

The H-scan analysis of ultrasound images is a matched-filter approach derived from analysis of scattering from incident pulses in the form of Gaussian-weighted Hermite polynomial functions. This framework is applied in a preliminary study of thyroid lesions to examine the H-scan outputs for three categories: normal thyroid, benign lesions, and cancerous lesions within a total group size of 46 patients. In addition, phantoms comprised of spherical scatterers are analyzed to establish independent reference values for comparison. The results demonstrate a small but significant difference in some measures of the H-scan channel outputs between the different groups.

Experiencia inicial en ecoendoscopía en el Hospital Edgardo Rebagliati, EsSalud, Lima, Perú / Initial Experience in endoscopic ultrasonography in Edgardo Rebagliati Hospital, Essalud, Lima, Peru

La experiencia local que se tiene con la ultrasonografía endoscópica (USE) es aún pequeña debido a la poca cantidad de centros que cuentan con el equipamiento y a la escasez de centros de entrenamiento así como una larga curva de aprendizaje. Objetivo: Reportar la experiencia en ecoendoscopías en el hospital que laboramos. Materiales y Métodos: Se realiza un estudio retrospectivo de las ecoendoscopÍas (USE) realizadas en el Hospital Nacional Edgardo Rebagliati Martins, Lima, Perú, desde enero a diciembre del 2012, recogiendo datos de filiación, diagnóstico endosonográfico, biopsia aspiración con aguja fina y citología. Los resultados se reportaron con estadística descriptiva. Resultados: Se realizaron 205 ecoendoscopías, de las cuales 116 (56,6%) fueron mujeres y 89 (43,4%) hombres. La edad media fue 60,8 +/- 15,6 años (rango: 17-84) 51,3% correspondieron a pacientes mayores de 60 años. De los exámenes realizados, 157 (76,6%) fueron en el tracto digestivo superior y 48 (23,4%) en la región ano-rectal. Los diagnósticos más frecuentes en las USE en el tracto digestivo superior fueron: lesiones sub-epiteliales (23,6%), normal (23,6%), neoplasias malignas (14,0%) siendo la del páncreas la más frecuente (7,6% del total), litiasis de la vía biliar-pancreática (12,7%) y lesiones quísticas del páncreas (12,1%). En cuanto a las USE de la región ano rectal, el diagnóstico más frecuente fue la neoplasia maligna (NM) de recto (47,9%). Se realizaron un total de 20 (9,8%) biopsias aspiración con aguja fina (BAAF). No se reportó complicación alguna...

Report our experience with endoscopic ultrasonography. Material and Methods: In this report we analyze retrospectivement the data of 205 EUS studies done from January to December 2012 at the Hospital. Lima, Peru. Age, sex, endoscopic diagnosis and the results of fine needle aspiration (FNA) are analyzed. Results: In this study 205 patients underwent to EUS. There were 116 patients (56.6%) females and 89 (43.4%) males. Mean age was 60.8 +/- 15.6 years (range: 17 û 84), 51.3% were over 60. 157patients (76.6%) had upper GI EUS tract and 48 (23.4%) of the lower. In upper GI EUS the most frequent diagnosis was: Sub epithelial lesions (22.7%), malignant neoplasm (13.5%) and pancreatic cancer the most frequent one (6.7%). Stones in the biliary and pancreatic duct (12.2%) and pancreatic cystic disease (9.8%) were found. Rectal cancer was the most frequent diagnosis in the ano-rectal EUS (47.9%). 20 fine needle aspiration biopsies were performed. No complications were reported...

[Initial experience in endoscopic ultrasonography in Edgardo Rebagliati Hospital, Essalud, Lima, Peru]. / Experiencia inicial en ecoendoscopía en el Hospital Edgardo Rebagliati, EsSalud, Lima, Perú

OBJECTIVE: Report our experience with endoscopic ultrasonography. MATERIAL AND METHODS: In this report we analyze retrospectivement the data of 205 EUS studies done from January to December 2012 at the Hospital. Lima, Peru. Age, sex, endoscopic diagnosis and the results of fine needle aspiration (FNA) are analyzed. RESULTS: In this study 205 patients underwent to EUS. There were 116 patients (56.6%) females and 89 (43.4%) males. Mean age was 60.8 ± 15.6 years (range: 17 - 84), 51.3% were over 60. 157 patients (76.6%) had upper GI EUS tract and 48 (23.4%) of the lower. In upper GI EUS the most frequent diagnosis was: Sub epithelial lesions (22.7%), malignant neoplasm (13.5%) and pancreatic cancer the most frequent one (6.7%). Stones in the biliary and pancreatic duct (12.2%) and pancreatic cystic disease (9.8%) were found. Rectal cancer was the most frequent diagnosis in the ano-rectal EUS (47.9%). 20 fine needle aspiration biopsies were performed. No complications were reported. CONCLUSION: This one year experience is the first step for the development of endoscopic ultrasonography in our country. Despite of problems with the design and number of patients, we believe we can say that GI EUS is a useful and safe for the diagnosis of different diseases of the GI tract and appropriate training is needed.

Rabdomiosarcoma alveolar de patrón sólido nasal, a propósito de un caso / Pattern alveolar rhabdomyosarcoma nasal solid, on the subject of a case

El rabdomiosarcoma (RMS) es considerado el sarcoma infantil más frecuente, y se origina a partir de células precursoras mesenquimatosas embrionarias del músculo estriado. El compromiso cutáneo se da por metástasis o por invasión local y es poco frecuente. El 41% de los RMS en los niños se localiza en cabeza y cuello, y las formas embrionaria y alveolar son las variantes más frecuentes. Presentamos un caso de RMS nasal de rápido crecimiento variante alveolar de patrón sólido, debido a la presentación en edad temprana para esta variante (AU)

Rhabdomyosarcoma (RMS) is one of the most common pediatric sarcoma, originated of the mesenquimal embryonal smooth muscle precursor cells.This tumor is unusual, when it involves the skin is by metastasis or local invasion. 41% of the pediatric RMS occurs in the head and neck.The alveolar and embryonal forms are the most common variants.We report a case of RMS alveolar form of solid pattern with rapid growth on nasal area (AU)