RESUMEN
Cambodia is a small, poor, and sparsely-populated country between Vietnam and Thailand, which is making a slow recovery from a long history of conflict. 80% of its 11.4 million people live by subsistence farming; rice is their main crop. Infant mortality is 89.4/1000, and 12% of children die before the age of 5 years. Life expectancy is around 50 years, and about 45,000 Khmers (Cambodians) are missing at least one limb from a 30 year deposit of landmines and dumping unexploded ordinance. Despite a decade of concerted effort by the international community to improve Cambodia's prospects, disease and poverty still define life for most of the population. In April, 2002, I visited Cambodia for the fourth time in 10 years, to see how medical aid projects were faring in particular, and to assess whether the past decade of international aid and intervention has improved the provision of health care for Khmers.
Asunto(s)
Reforma de la Atención de Salud , Accesibilidad a los Servicios de Salud/economía , Necesidades y Demandas de Servicios de Salud , Errores Médicos/estadística & datos numéricos , Pobreza , Adulto , Cambodia , Niño , Femenino , Accesibilidad a los Servicios de Salud/organización & administración , Humanos , MasculinoRESUMEN
We report the case of a meningeal inflammatory pseudotumour occurring in a 23-year-old male presenting with focal seizures and headaches. Brain imaging techniques showed a 3.5 cm left parietal meningeal tumour. Histology of the surgical specimen showed a dense lymphoid infiltrate permeating the dura mater and leptomeninges, consisting of a predominant polyclonal B cell population as confirmed by immunophenotyping and genotyping. Cultures of serum, CSF, and surgical specimen were negative and there was no serological evidence of a systemic dysimmune disease. The postoperative course was complicated by an episode of brain oedema resolving under steroid therapy. The patient, free from all medication, is asymptomatic at 3 years of follow-up. We discuss previously published cases and the nosology of intracranial inflammatory pseudotumours.
Asunto(s)
Neoplasias Meníngeas/diagnóstico , Meningitis/diagnóstico , Adulto , Duramadre/patología , Duramadre/cirugía , Humanos , Imagen por Resonancia Magnética , Masculino , Neoplasias Meníngeas/patología , Neoplasias Meníngeas/cirugía , Meningitis/patología , Meningitis/cirugía , Seudotumor Cerebral/diagnóstico , Seudotumor Cerebral/patología , Seudotumor Cerebral/cirugíaRESUMEN
Thyrotoxicosis is the clinical syndrome that results when tissues are exposed to high levels of circulating thyroid hormones. In most instances thyrotoxicosis is due to hyperthyroidism, a term reserved for disorders characterized by overproduction of thyroid hormones by the thyroid gland. Nevertheless, thyrotoxicosis may also result from a variety of conditions other than thyroid hyperfunction. The present report focuses on the etiologies, pathophysiology, and treatment of iatrogenic thyrotoxicosis. Iatrogenic thyrotoxicosis may be caused by (1) subacute thyroiditis (a result of lymphocytic infiltration, cellular injury, trauma, irradiation) with release of preformed hormones into circulation; (2) excessive ingestion of thyroid hormones ("thyrotoxicosis factitia"); (3) iodine-induced hyperthyroidism (radiologic contrast agents, topical antiseptics, other medications). Among these causes of iatrogenic thyrotoxicosis, that induced by the iodine overload and cytotoxicity associated with amiodarone represents a significant challenge. Successful management of amiodarone-induced thyrotoxicosis requires close cooperation between endocrinologists and endocrine surgeons. Surgical treatment may have a leading yet often underestimated role in view of the potential life-threatening severity of this disease, whereas others kinds of iatrogenic thyrotoxicosis are usually treated conservatively.
Asunto(s)
Enfermedad Iatrogénica/prevención & control , Tirotoxicosis/etiología , Tirotoxicosis/prevención & control , Amiodarona/efectos adversos , Animales , Citocinas/efectos adversos , Femenino , Humanos , Yoduros/efectos adversos , Radioisótopos de Yodo/efectos adversos , Litio/efectos adversos , Masculino , Pronóstico , Medición de Riesgo , Factores de Riesgo , Tasa de Supervivencia , Tiroidectomía/métodos , Tirotoxicosis/fisiopatologíaRESUMEN
The value of nerve biopsy in the investigation of peripheral neuropathies is an important and controversial issue, partially obscured by the large variations in the diagnostic yield routinely reported for this procedure. The aim of this study was to evaluate the clinical and neuropathological parameters affecting the yield of nerve biopsy. We compared the experience of two independent neuropathology laboratories with different patient recruitment and neuropathological methods over 11 years (01/1987-12/1997). Clinicopathological correlations were studied retrospectively in 355 patients. Using the same criteria of evaluation, contributive biopsies accounted for 35.5% in one laboratory, and 47.3% in the other. Clinical parameters affecting the yield of nerve biopsy were: (a) the presumptive diagnosis at time of referral for biopsy; (b) the distribution of symptoms; and (c) the interval between disease onset and biopsy. Greater yield was associated with clinically suspected vasculitis, inflammatory demyelinating neuropathy or hereditary sensorimotor neuropathies. Contributive findings were more often reported with multifocal or asymmetrical presentations, and onset-to-biopsy interval of less than 6 months. The contribution of nerve biopsy varied according to neuropathological techniques: (a) serial sections on frozen. paraffin-embedded and resin-embedded material improved sensitivity for interstitial pathology: (b) combined muscle biopsy increased sensitivity in the detection of vasculitis; and (c) teasing of nerve fibers added critical information to other classical techniques in only 4/102 cases.
Asunto(s)
Nervios Periféricos/patología , Enfermedades del Sistema Nervioso Periférico/patología , Adolescente , Adulto , Anciano , Biopsia , Electrofisiología , Humanos , Persona de Mediana Edad , Nervios Periféricos/fisiopatología , Enfermedades del Sistema Nervioso Periférico/fisiopatología , Estudios Retrospectivos , Factores de TiempoRESUMEN
Between April 1994 and June 1997, 197 thyroidectomies and 21 cervical explorations for hyperparathyroidism were performed under hypnosedation (HYP) and compared to the operative data and postoperative courses of a closely-matched population (n = 121) of patients operated on under general anaesthesia (GA). Conversion from hypnosis to GA was needed in two cases (1%). All surgeons reported better operating conditions for cervicotomy using HYP. All patients having HYP reported a very pleasant experience and had significantly less postoperative pain while analgesic use was significantly reduced in this group. Hospital stay was also significantly shorter, providing a substantial reduction of the medical care costs. The postoperative convalescence was significantly improved after HYP and full return to social or professional activity was significantly shortened. We conclude that HYP is a very efficient technique providing physiological, psychological and economic benefits to the patient.
Asunto(s)
Anestesia General , Sedación Consciente/métodos , Hipnosis Anestésica/métodos , Paratiroidectomía , Tiroidectomía , Acetaminofén/análogos & derivados , Acetaminofén/uso terapéutico , Adulto , Analgésicos/uso terapéutico , Antiinflamatorios no Esteroideos/uso terapéutico , Sedación Consciente/efectos adversos , Femenino , Costos de la Atención en Salud , Hospitalización , Humanos , Hiperparatiroidismo/cirugía , Hipnosis Anestésica/efectos adversos , Complicaciones Intraoperatorias , Tiempo de Internación , Masculino , Persona de Mediana Edad , Dolor Postoperatorio/prevención & control , Paratiroidectomía/efectos adversos , Satisfacción del Paciente , Piroxicam/análogos & derivados , Piroxicam/uso terapéutico , Profármacos/uso terapéutico , Recuperación de la Función , Tiroidectomía/efectos adversosRESUMEN
OBJECTIVE: The authors review their experience with initial bilateral neck exploration under local anesthesia and hypnosedation for primary hyperparathyroidism. Efficacy, safety, and cost effectiveness of this new approach are examined. BACKGROUND: Standard bilateral parathyroid exploration under general anesthesia is associated with significant risk, especially in an elderly population. Image-guided unilateral approaches, although theoretically less invasive, expose patients to the potential risk of missing multiple adenomas or asymmetric hyperplasia. Initial bilateral neck exploration under hypnosedation may maximize the strengths of both approaches while minimizing their weaknesses. METHODS: In a consecutive series of 121 initial cervicotomies for primary hyperparathyroidism performed between 1995 and 1997, 31 patients were selected on the basis of their own request to undergo a conventional bilateral neck exploration under local anesthesia and hypnosedation. Neither preoperative testing of hypnotic susceptibility nor expensive localization studies were done. A hypnotic state (immobility, subjective well-being, and increased pain thresholds) was induced within 10 minutes; restoration of a fully conscious state was obtained within several seconds. Patient comfort and quiet surgical conditions were ensured by local anesthesia of the collar incision and minimal intravenous sedation titrated throughout surgery. Both peri- and postoperative records were examined to assess the safety and efficacy of this new approach. RESULTS: No conversion to general anesthesia was needed. No complications were observed. All the patients were cured with a mean follow-up of 18 +/- 12 months. Mean operating time was <1 hour. Four glands were identified in 84% of cases, three glands in 9.7%. Adenomas were found in 26 cases; among these, 6 were ectopic. Hyperplasia, requiring subtotal parathyroidectomy and transcervical thymectomy, was found in five cases (16.1%), all of which had gone undetected by localization studies when requested by the referring physicians. Concomitant thyroid lobectomy was performed in four cases. Patient comfort and recovery and surgical conditions were evaluated on visual analog scales as excellent. Postoperative analgesic consumption was minimal. Mean length of hospital stay was 1.5 +/- 0.5 days. CONCLUSIONS: Initial bilateral neck exploration for primary hyperparathyroidism can be performed safely, efficiently, and cost-effectively under hypnosedation, which may therefore be proposed as a new standard of care.
Asunto(s)
Anestesia Local , Sedación Consciente , Hiperparatiroidismo/cirugía , Hipnosis , Adulto , Anciano , Anciano de 80 o más Años , Femenino , Estudios de Seguimiento , Humanos , Masculino , Persona de Mediana Edad , CuelloRESUMEN
OBJECTIVES: To assess the feasibility of endocrine cervical surgery under hypnoanesthesia as a valuable, safe, efficient, and economic alternative to general anesthesia. METHODS: Between April 1994 and June 1997, 197 thyroidectomies and 21 cervical explorations for hyperparathyroidism were performed under hypnoanesthesia (HYP) using Erikson's method. Operative data and postoperative course of this initial series were compared to a contemporary population of patients (n = 119) clinically similar except that they declined HYP or were judged unsuitable for it, and who were therefore operated on under general anesthesia (GA). RESULTS: The surgeons all reported better operating conditions for cervicotomy using HYP. Conversion from hypnosis to GA was needed in two cases (1%). All patients having HYP reported a pleasant experience and, keeping in mind that the GA group is not a randomly assigned control group, both had significantly less postoperative pain and analgesic use. Hospital stay was also significantly shorter, providing a substantial reduction in the costs of medical care. The postoperative convalescence was significantly improved after HYP and a full return to social or professional activity was significantly quicker. CONCLUSION: From this study, we conclude that HYP is an effective technique for providing relief of intraoperative and postoperative pain in endocrine cervical surgery. The technique results in high patient satisfaction and better surgical convalescence. This technique can therefore be used in most well-chosen patients and reduces the socioeconomic impact of hospitalization.
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Anestesia General , Hipnosis Anestésica , Paratiroidectomía , Tiroidectomía , Adulto , Anestesia General/métodos , Sedación Consciente/métodos , Femenino , Humanos , Hiperparatiroidismo/cirugía , Masculino , Persona de Mediana Edad , Dolor Postoperatorio , Periodo Posoperatorio , Estudios Retrospectivos , Enfermedades de la Tiroides/cirugíaRESUMEN
Glycoconjugates and their antibodies are vital components of host-tumor interaction. This review concentrates on the oncological implications of research concerning the alpha gal triad; the alpha 1-->3 galactosyl epitope (alpha Gal), the enzyme responsible for its construction, alpha 1,3 galactosyl transferase (alpha 1-3GT), and its associated antibody: anti-gal. Alpha gal epitopes, previously assumed to be absent from human tissue, have been demonstrated on several human cancer cell lines, senescent red blood cells, and Graves' disease thyrocytes. Alpha-gal presence on neoplastic lines is correlated with increased metastatic formation in animal models. The mechanisms of human response to these neoantigens are complex, as natural anti-gal antibodies exist in high titers in normal sera, thus predicting immunological recognition of cells expressing alpha gal epitopes. Hypotheses vary regarding the pathogenic contributions of metastasis-associated phenomena such as de novo expression of alpha gal and its unmasking by desialylation. The means by which alpha gal is sporadically expressed in human tissue remain unknown, as the galactosyl transferase which produces this epitope in constitutively expressive animals has undergone significant mutation at the genomic level in humans. Pathological re-expression is presumed to require permissive changes at a cellular level. Detailing these alterations is a prerequisite to the comprehension of the metastatic phenotype. In this context, the possibility of therapeutic strategies affecting alpha gal expression are also discussed.