RESUMEN
We designed and built a mobile experimental set-up for studying the interaction of ion beams with solid samples in a wide temperature range from 9 to 300 K. It is either possible to mount up to three samples prepared ex situ or to prepare samples by condensation of molecules from gases or vapours onto IR or Visible-ultraviolet (Vis-UV) transparent windows. The physico-chemical evolution during irradiation can be followed in situ with different analysis techniques including Fourier transform infrared spectroscopy, Vis-UV, and quadrupole mass spectrometry.
RESUMEN
PURPOSE: We review our technique of ureteroscopic management of lower pole renal calculi with Nitinol basket displacement and holmium laser stone fragmentation. METHODS: Lower pole calculi are identified with a 7.5F flexible ureteroscope. In patients in whom the laser fiber reduces ureteroscopic deflection, precluding reentry into the lower pole, a Nitinol basket or grasper is used to displace the calculi into an upper pole calix for easier fragmentation. RESULTS: The Nitinol device can be passed into the lower pole through the fully deflected ureteroscope without any loss of deflection. Irrigation is significantly reduced by the basket, but this factor does not impede stone retrieval. CONCLUSIONS: Ureteroscopic management of lower pole stones is a reasonable alternative to SWL or percutaneous nephrolithotomy in low-volume stone disease. If the stone cannot be fragmented in situ, Nitinol basket capture through a fully deflected ureteroscope into a less dependent position facilitates stone fragmentation.
Asunto(s)
Cálculos Renales/cirugía , Ureteroscopía/métodos , Diseño de Equipo , Humanos , Terapia por Láser , Stents , Urología/instrumentación , Urología/métodosRESUMEN
The aim of the study was to evaluate the soluble form of intercellular adhesion molecule 1 (sICAM-1), a ligand of LFA-1, in the serum of patients with spondylarthropathies (SpA) and to look for a correlation with several inflammatory parameters. sICAM-1 levels were measured by ELISA in 25 SpA patients, 20 healthy controls and 20 patients with rheumatoid arthritis (RA). Results showed that sICAM-1 levels were increased (but not significantly) in SpA patients compared with controls; high levels (> 400 ng/ml) where found in 28% of SpA patients but in none of the RA or control groups. In SpA, correlations were found between sICAM-1 and erythrocyte sedimentation rate, C-reactive protein and interleukin 6, but not with tumour necrosis factor alapha or IgA. These correlations were absent in RA. In conclusion, these results suggest that sICAM-1 levels in SpA may reflect the acute phase of inflammation.
Asunto(s)
Artritis Reumatoide/sangre , Molécula 1 de Adhesión Intercelular/sangre , Espondilitis Anquilosante/sangre , Adulto , Anciano , Artritis Reumatoide/inmunología , Biomarcadores/análisis , Ensayo de Inmunoadsorción Enzimática , Femenino , Humanos , Molécula 1 de Adhesión Intercelular/inmunología , Masculino , Persona de Mediana Edad , Pronóstico , Valores de Referencia , Sensibilidad y Especificidad , Solubilidad , Espondilitis Anquilosante/inmunologíaRESUMEN
Amyloid arthropathy is a form of primary AL amyloidosis with a monoclonal component in the blood and/or urine, and RS3PE syndrome is acute edematous polysynovitis in subjects older than 60 years. A 74-year-old man was diagnosed with both disorders. He was admitted for benign acute polyarthritis of the hands and feet and reported carpal tunnel symptoms predominating on the right. A synovial biopsy at the right wrist disclosed deposits that stained with Congo red even after potassium permanganate treatment (positive Wright's test). Articular AL amyloidosis was diagnosed. The symptoms resolved under glucocorticoid therapy alone, casting some doubt on their relationship with the amyloidosis. Roentgenograms showed geodes, a feature not present in RS3PE. Whether RS3PE may be among the possible presentations of articular amyloidosis is discussed.
Asunto(s)
Amiloidosis/diagnóstico , Artritis/diagnóstico , Edema/diagnóstico , Sinovitis/diagnóstico , Articulación de la Muñeca/patología , Anciano , Amiloidosis/tratamiento farmacológico , Artritis/tratamiento farmacológico , Biopsia , Rojo Congo , Diagnóstico Diferencial , Humanos , Masculino , Prednisona/uso terapéutico , Radiografía , Coloración y Etiquetado , Síndrome , Membrana Sinovial/patología , Articulación de la Muñeca/diagnóstico por imagenRESUMEN
The surgical management of urinary calculus disease has undergone a dramatic evolution over the past 2 decades. Twenty years ago, open surgical procedures for urinary calculi were some of the most frequently performed urologic procedures. Since then, however, stone management has been at the forefront of "minimally invasive" intervention. Specifically, the initiation and refinement of percutaneous and ureteroscopic access to the upper tracts, along with the rapid and nearly simultaneous development of both extracorporeal and intracorporeal lithotripsy techniques, has limited the role of open surgery to less than 1% of patients undergoing intervention for their stone disease. This manuscript will review the current indications for the surgical management of urinary calculi, the basic physics of the most frequently utilized vehicles for both extracorporeal and intracorporeal lithotripsy, and the respective roles of extracorporeal and intracorporeal lithotripsy with percutaneous or ureteroscopic access and open surgery. In addition, the results and complications associated with each of these forms of intervention will be reviewed. Finally, a discussion of specific clinical challenges to the urologist will be presented.
Asunto(s)
Cálculos Renales/cirugía , Cálculos Urinarios/cirugía , Árboles de Decisión , Humanos , Cálculos Renales/terapia , Litotricia , Cálculos Ureterales/terapia , Ureteroscopía , Procedimientos Quirúrgicos Urológicos/instrumentación , Procedimientos Quirúrgicos Urológicos/métodosRESUMEN
224 salmonella strains from human beings, collected by the public and private laboratories of Ille-et-Vilaine during 1983, were serotyped and tested for their susceptibility to antibiotics. Salmonella typhimurium infections were the most frequent, while the other serotypes constituted a small number of strains, generally susceptible to antibiotics. No outbreak due to a multi-resistant serotype was observed. S. typhi and S. paratyphi B represent 6,25% of the strains isolated in this area during the year. Only 22% of the 224 strains collected were resistant to one or more antibiotics.
Asunto(s)
Antibacterianos/farmacología , Infecciones por Salmonella/microbiología , Salmonella/clasificación , Adolescente , Adulto , Niño , Preescolar , Farmacorresistencia Microbiana , Femenino , Francia , Humanos , Lactante , Masculino , Persona de Mediana Edad , Salmonella/efectos de los fármacos , Infecciones por Salmonella/tratamiento farmacológico , Infecciones por Salmonella/epidemiología , SerotipificaciónRESUMEN
Rapid identification and antimicrobial testing of Enterobacteriaceae by an automated system, the ABAC-Identibiogramme. The system was directly inoculated with a dilution of positive blood culture broths. The results were compared with those of API 20E and the disk method for antibiogram. The ratios of agreement of 94.5% for identification and of 93.4% for antimicrobial testing demonstrate a good accuracy of the ABAC-Identibiogramme.
Asunto(s)
Farmacorresistencia Microbiana , Enterobacteriaceae/efectos de los fármacos , Pruebas de Sensibilidad Microbiana/métodos , Automatización , HumanosRESUMEN
The authors report a case of malignant tumor of the thyroid in a 79 years old woman with a long standing goiter for 20 years but who did not live in endemic mountainous goiter area. The right lobe of the thyroid was surgically removed in February 1992 because increasing in size. Pathologic diagnosis was non malignant cystic lesion. Two months later, a recurrence with dyspnea urged a tracheostomy. The patient died 9 days later because of intra bronchial and pleura hemorrhage. The morphological and immuno-histochemical investigations showed angiosarcomatous features and positive reactivity with Factor VIII and UEA 1 markers in the tumour and pulmonary metastases. The diagnosis of Malignant hemangio-endothelioma was concluded.
Asunto(s)
Hemangiosarcoma/patología , Neoplasias de la Tiroides/patología , Anciano , Resultado Fatal , Femenino , Hemangiosarcoma/secundario , Hemangiosarcoma/cirugía , Humanos , Neoplasias de la Tiroides/cirugíaRESUMEN
When they analysed 80 cancers of the uterus, the authors showed how valuable it was both for diagnosis and prognosis to carry out cytological lavage of the peritoneum, particularly in cases of endometrial adenocarcinoma. The results of this study are compared with recent extracts appearing in the international literature. This technique makes it possible to identify groups of patients of high risk for recurrences in the pelvis and abdomen who would benefit from adjuvant therapies, demonstrating that this technique is applicable to the diagnosis of gynaecological cancers with intraperitoneal spread which have long been failed to be recognised. The procedure is innocuous and simple and therefore should be carried out widely in the management of uterine cancers.
Asunto(s)
Adenocarcinoma/complicaciones , Técnicas Citológicas/normas , Lavado Peritoneal/normas , Neoplasias Peritoneales/patología , Neoplasias del Cuello Uterino/complicaciones , Neoplasias Uterinas/complicaciones , Adenocarcinoma/cirugía , Adulto , Anciano , Estudios de Evaluación como Asunto , Femenino , Humanos , Histerectomía , Incidencia , Persona de Mediana Edad , Estadificación de Neoplasias , Lavado Peritoneal/métodos , Neoplasias Peritoneales/epidemiología , Neoplasias Peritoneales/secundario , Valor Predictivo de las Pruebas , Pronóstico , Tasa de Supervivencia , Neoplasias del Cuello Uterino/cirugía , Neoplasias Uterinas/cirugíaRESUMEN
The cuniculatum carcinoma is a rare type of epidermoid carcinoma. We report 6 cases with different localizations ("oral cavity and larynx", vulva, lower limb) treated over a 23-year period. Diagnosis is particularly difficult and requires careful clinical examination completed by deep surgical biopsy for histology. The aetiology of the tumour is not well defined. It presents as a slow growing wart with local malignancy and chronic suppuration. Extension to lymph nodes is rare. Histologically there is proliferative deep malpighian infiltration with an aspect of normal cell maturation. Galeries are hollowed out giving the aspect of a rabbit burrow (cuniculatum). Surgery is the only treatment, generally without lymph node curage. Radiotherapy is contraindicated due to anaplastic transformation.
Asunto(s)
Neoplasias Óseas/patología , Carcinoma de Células Escamosas/patología , Talón/patología , Neoplasias de Oído, Nariz y Garganta/patología , Neoplasias de la Vulva/patología , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Biopsia , Neoplasias Óseas/cirugía , Carcinoma de Células Escamosas/cirugía , Diagnóstico Diferencial , Femenino , Humanos , Masculino , Persona de Mediana Edad , Neoplasias de Oído, Nariz y Garganta/cirugía , Neoplasias de la Vulva/cirugíaRESUMEN
Extra-skeletal Ewing's Sarcoma (EES): a clinico-pathological entity described in 1975 by L. Angervall and F.M. Enzinger. This article reports a new case in which the primary was localized in the right forearm and metastasized to the left lung fourteen years later. A detailed review of the literature emphasized similarities and differences between osseous and extra-osseous Ewing's Sarcoma.
Asunto(s)
Sarcoma de Ewing/patología , Neoplasias de los Tejidos Blandos/patología , Neoplasias Óseas/patología , Femenino , Antebrazo , Humanos , Neoplasias Pulmonares/secundario , Persona de Mediana EdadRESUMEN
One hundred thyroids from autopsies performed in a Cancer Center were sectioned at 4 mm intervals. Each slice was processed to obtain one or several sections for histologic examination. Five primary microcarcinomas and ten secondary clinically unknown carcinomas were found. This study and the review of the literature confirm that the high prevalence rate of microcarcinomas, most of them papillary, in autopsies does not agree with the clinically diagnosed carcinoma rate. Tumors greater than 5 mm in diameter may sometimes be aggressive. Intrathyroid metastases are relatively frequent in cancerous dissemination observed in autopsies, but raise problems when they precede the primary tumor or are revealed on surgical samples a long time after because of a slow development. The authors emphasize the importance of differential diagnosis between primary and secondary tumors and the value of immunohistochemistry for histological diagnosis.
Asunto(s)
Carcinoma/patología , Neoplasias de la Tiroides/patología , Adulto , Anciano , Anciano de 80 o más Años , Carcinoma/secundario , Neoplasias del Sistema Digestivo/patología , Femenino , Humanos , Neoplasias Pulmonares/patología , Masculino , Persona de Mediana Edad , Neoplasias de la Tiroides/secundarioRESUMEN
Isolates of Streptococcus faecalis are moderately susceptible to quinolones, penicillins and aminoglycosides used alone. Penicillin-aminoglycosides synergism is not observed against aminoglycosides high-level resistant strains. The combination of an aminoglycoside plus a quinolone was synergistic against susceptible strains of S. faecalis but not against aminoglycosides high-level resistant strains. No antagonistic effect of quinolones plus aminoglycosides or plus penicillin was observed.
Asunto(s)
Aminoglicósidos/farmacología , Enterococcus faecalis/efectos de los fármacos , Penicilinas/farmacología , Quinolinas/farmacología , Sinergismo Farmacológico , Cinética , Resistencia a las PenicilinasRESUMEN
PURPOSE: When using a ureteral access sheath following a ureteroscopic procedure, placement of an internal ureteral stent can be simplified by inserting the stent through the sheath without the need to reinsert the cystoscope. MATERIALS AND METHODS: An indwelling ureteral stent with the pull string attached is inserted over the guide wire into the access sheath followed by the pusher. The guide wire is partially withdrawn allowing the stent to form a coil in the renal pelvis, using the pull string to adjust the stent position. The fluoroscopy unit is then focused onto the bladder and the guide wire is slowly withdrawn until its tip is at the level of pubic symphysis. The pusher and guide wire are then removed and the pull string is cut at the urethral meatus. RESULTS: Among 71 cases studied 60 required ureteral stent placement. In 43 of the 60 cases (72%) the ureteral access sheath greatly facilitated ureteroscopy, and a stent was placed through the access sheath in 34 (79%). Stent placement through the access sheath was successful in all cases, with an average time saving of 2.3 minutes per case, compared to placing the stent by reinserting a cystoscope. CONCLUSIONS: If an access sheath has already been placed during a ureteroscopic procedure and stent insertion is deemed necessary, the stent can be easily placed through the access sheath under fluoroscopic guidance without the need to reinsert the cystoscope. Our experience suggests that all urologists who routinely perform ureteroscopic procedures can easily master this timesaving technique.
Asunto(s)
Stents , Ureteroscopía/métodos , Seguridad de Equipos , Humanos , Sensibilidad y Especificidad , Obstrucción Ureteral/cirugía , UreteroscopiosRESUMEN
A neonate with an immature, poorly demarcated retroperitoneal teratoma invading the aorta-vena cava space died immediately after surgery. Among 34 cases of retroperitoneal teratoma discovered during the first postnatal month, including one renal case and ours, eight can be considered malignant on the basis of histology in two cases and clinical course in six. Five of these tumors exhibited a significant immature component. In neonates, the proportion of malignant teratomas is greater for retroperitoneal tumors than for other sites: sacrum and coccyx, heart, neck, mediastinum, and abdomen. Evaluation of chemotherapy in teratomas with significant immature components is difficult because few of the patients of this small sample received such treatment. As in other sites, regardless of the degree of maturity, exeresis must be as complete as possible.
Asunto(s)
Neoplasias Retroperitoneales , Teratoma , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Quimioterapia Adyuvante , Preescolar , Femenino , Humanos , Lactante , Recién Nacido , Masculino , Pronóstico , Radiografía , Neoplasias Retroperitoneales/diagnóstico por imagen , Neoplasias Retroperitoneales/epidemiología , Neoplasias Retroperitoneales/patología , Neoplasias Retroperitoneales/cirugía , Teratoma/diagnóstico por imagen , Teratoma/epidemiología , Teratoma/patología , Teratoma/cirugía , Resultado del TratamientoRESUMEN
We present a new case report of "Insular" thyroid carcinoma. The first series was published, in 1984, by Carcangiu et al. The propensity for local recurrence and early distant metastases explains the poor prognosis of this carcinoma and demands aggressive therapy at the time of diagnosis. This includes radical surgery, radiotherapy with possible chemotherapy. Clinical and pathological arguments suggest that this carcinoma could be an intermediate stage in the process of loss of differentiation of some thyroid neoplasms.
Asunto(s)
Carcinoma/patología , Neoplasias de la Tiroides/patología , Carcinoma/sangre , Carcinoma/radioterapia , Carcinoma/cirugía , Terapia Combinada , Femenino , Humanos , Radioisótopos de Yodo/uso terapéutico , Escisión del Ganglio Linfático , Metástasis Linfática , Persona de Mediana Edad , Tiroglobulina/análisis , Neoplasias de la Tiroides/sangre , Neoplasias de la Tiroides/radioterapia , Neoplasias de la Tiroides/cirugía , TiroidectomíaRESUMEN
In amphibian embryos the central nervous system derives from the dorsal region of the ectoderm. Molecular studies led to the formulation of the "neural default model" in which neural development is under the inhibitory control of members of the BMP family. These growth factors also act as epidermis inducers. The neural fate is revealed by factors secreted by the Spemann Organizer such as noggin, chordin, follistatin, Xnr3 and cerberus which act by blocking BMP signalling. We propose a new model for neural cell determination in which a signalling pathway controlled by an increase in intracellular calcium suppresses the epidermis fate and activates the neural fate instead. This increase in calcium is due to an influx through calcium channels of the L-type, expressed in ectodermal cells during gastrulation. The possible involvement of a calcium-dependent phosphatase (calcineurin) to inhibit the epidermis fate and a calcium-calmodulin kinase (CaMkinase II) which activates the neural fate is discussed.