RESUMO
White croaker (Genyonemus lineatus), collected from a highly contaminated site in San Pedro Bay and from a reference site 80 km away (Dana Point), were induced to spawn in the laboratory. Forty-one per cent of San Pedro Bay females and 54% of Dana Point females spawned. Examination of the ovaries of non-spwaning females revealed that spawning was imminent in the remainder of Dana Point fish but only in 16% of the San Pedro Bay fish. The remainder of the San Pedro Bay fish (43%) contained only immature, yolky oocytes. No croakers containing more than 3.8 ppm ovarian total DDT could be induced to spawn whereas 36% of a contemporaneous San Pedro Bay sample had ovarian total DDT residues in excess of 4 ppm. This suggests that the inability to induce spawning in white croaker may be associated with an ovarian total DDT threshold of about 4 ppm. These data, coupled with observed decreases in fecundity (32%), fertility (14%), and early oocyte loss (30%) relative to reference fish, could partially explain the population declines observed for many southern California fishes since the 1940s.
RESUMO
A statistical survey of the incidence, age and sx distribution, and preferential sites of occurrence of tumours of the central nervous system observed at the University Hospital of the West Indies during a 15-year period is presented. Four hundred and seventy-six histologically confirmed neoplasms were recorded. Intracranial tumours were 7 times as common as those of the spinal cord. Of 416 intracrianl neoplasms, ther were 40% neuropithelial tumors, 21% meningiomas, 15% pituitary adenomas, 9% metastic lesions, 6% congenital tumours, 5% vasoformative tumours, 3% nerve sheath tumours and 1% unclassified neoplasms. Men and women were equally affected. Meningiomas and pituitary adenomas were more frequent than in otherreported series. Metastases were relatively more frequent in the spinal than in the intracranial group. Of the primary spinal tumours, those of nerve sheath origin were nearly three times as common as the meningiomas
Assuntos
Humanos , Masculino , Feminino , Neoplasias da Medula Espinal/epidemiologia , Neoplasias Encefálicas/epidemiologia , Adenoma/epidemiologia , Fatores Sexuais , Fatores Etários , Glioma/epidemiologia , Jamaica , Meningioma/epidemiologiaRESUMO
A rare case of solitary, dorsally locared, intramedullary schwannoma of the thoracic spinal cord is reported in a 54-year-old man. The pathogenesis of the rumour in this location is discussed
Assuntos
Pessoa de Meia-Idade , Humanos , Masculino , Neoplasias da Medula Espinal , Neurilemoma , Neoplasias da Medula Espinal/cirurgia , Neurilemoma/cirurgiaAssuntos
Adulto , Humanos , Masculino , Nervo Ulnar , Abscesso/complicações , Hanseníase/complicaçõesAssuntos
Demência/enfermagem , Idoso , Feminino , Humanos , Relações Enfermeiro-Paciente , Assistência TerminalRESUMO
Two cases of spinal cord compression resulting from extramedullary haemopoiesis in patients with thalassaemia of intermediate clinical severity are reported. The association between mild thalassaemia with long survival and the risk of spinal cord compression from extramedullary haemopoietic deposits is emphasised.
Assuntos
Compressão da Medula Espinal/etiologia , Talassemia/complicações , Vértebras Torácicas/patologia , Adulto , Feminino , Humanos , Masculino , Compressão da Medula Espinal/patologia , Compressão da Medula Espinal/cirurgia , Talassemia/patologiaRESUMO
A case is reported of a 21 year old man with polycythaemia and a vascular frontal lobe tumour that was histologically compatible with the diagnosis of haemangioblastoma. On review of the English literature no case could be found of polycythaemia associated with supratentorial haemangioblastoma.
Assuntos
Neoplasias Encefálicas/complicações , Hemangiossarcoma/complicações , Policitemia/complicações , Adulto , Neoplasias Encefálicas/patologia , Lobo Frontal/patologia , Hemangiossarcoma/patologia , Humanos , MasculinoAssuntos
Acromegalia/terapia , Criocirurgia , Hipofisectomia , Neoplasias Hipofisárias/cirurgia , Glândulas Suprarrenais/fisiopatologia , Adulto , Feminino , Hormônio do Crescimento/sangue , Humanos , Masculino , Métodos , Pessoa de Meia-Idade , Neoplasias Hipofisárias/fisiopatologia , Técnicas Estereotáxicas , Glândula Tireoide/fisiopatologiaAssuntos
Doenças das Artérias Carótidas/diagnóstico por imagem , Doença das Coronárias/diagnóstico por imagem , Adolescente , Adulto , Fatores Etários , Idoso , Angiografia/efeitos adversos , Artérias Carótidas/anormalidades , Doenças Arteriais Cerebrais/diagnóstico por imagem , Criança , Pré-Escolar , Constrição , Feminino , Humanos , Lactente , Recém-Nascido , Isquemia , Ataque Isquêmico Transitório/diagnóstico por imagem , Masculino , Pessoa de Meia-Idade , Pescoço/diagnóstico por imagem , Gravidez , Fatores SexuaisRESUMO
The mode circulation time was measured using intravenously injected technetium 99(m) and a collimation system devised to discriminate between the right and left sides of the head. The results in 21 normal men were used as a basis of assessing the findings in 205 patients, made up of five diagnostic groups (ischaemia, haematoma, subarachnoid haemorrhage, intracranial tumour, and head injury). The average mode circulation time in the affected hemisphere for the three groups with vascular disease was increased, but even in these groups half the patients had a mode circulation time within 1 SD of normal mean; similar results were found for asymmetry between the hemispheres. In serial measurements in 45 patients no correlation was found between change in mode circulation time and the clinical state. That so many results are within the normal range limits the value of this method.
