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Biomedical subjects

G Weiser

Publications and source records attributed to G Weiser.

At least 19 recordsLinked to original sources
PubMed1987

[Intracranial manifestation of so-called "melanotic neuroectodermal tumor of infancy"--a choristoma with neural crest potentials].

A case is reported of so-called "melanotic neuroectodermal tumour of infancy" (= MNTI) in a female newborn. The tumour, whose localization was intracranial, but extracerebral, could be removed subtotally. A further 22 cases of the MNTI with neurocranial manifestations reported in the literature, but differing from our case in their extracranial growth, are listed for comparison. We believe that the neural crest is the histogenic origin of the MNTI and, therefore, our proposed definition is: "Christoma with neural crest potencies."

Brain Neoplasms↗
PubMed1987

[So-called "ependymoma of the foramen of Monro" with differentiation of tissue toward the subfornical organ].

A tumour was found in the left ventricle of a 25 year-old woman. Histology of this "ependymoma of Monro's foramen" shows characteristic structures of the subfornical organ. Whereas tumours of the pituitary or the pineal gland, which are also part of the circumventricular organs, are quite frequent, a tumour with differentiation characteristic of the subfornical organ is a rarity.

Adult↗
PubMed1986

Applicability of leukocyte esterase test strip in detection of canine pyuria.

A commercially available leukocyte esterase assay was evaluated for application in analyzing canine urine for the detection of pyuria. In 229 urine samples, the leukocyte esterase activity was compared with leukocyte concentrations, as assessed by microscopic sediment analysis and chamber cell counts. The leukocyte esterase assay was specific (93.2%) for canine pyuria, but was poorly sensitive (46.0%) and did not appear to be applicable to analysis of canine urine samples.

Animals↗
PubMed1986

Neurosarcoid reaction in association with a ruptured ACA-aneurysm.

A case of neurosarcoid reaction presenting itself as a mass lesion associated with a ruptured ACA aneurysm is reported. Diagnosis was established by histological investigation of the resected "brain tumour". The pre-operative diagnostic problems, similar cases in the literature as well as the possible pathogenesis are discussed.

Cerebral Cortex↗
PubMed1985

[Pathologic anatomy and mechanism of brain tissue damage in Mycoplasma infection based on a case report].

The following report deals with the pathological findings in severe brain tissue damage secondary to Mycoplasma infection with positive serological identification. The patient, a girl of 4 1/2 years, presented with the clinical signs of severe cerebral damage of acute onset and succumbed after an illness of 74 days. Autopsy revealed extensive cortical necrosis in one hemisphere with focal necrosis in the basal ganglia of the opposite hemisphere, together with demyelination and marked glial reaction. Although the changes suggest damage due to circulatory factors, the brain vessels appear normal. Disseminated intravascular coagulation appears to be the most likely pathogenesis.

Brain↗
PubMed1985

Subarachnoid metastases from a prolactinoma.

A 37-year-old man developed a left frontal metastasis from a prolactin-secreting pituitary tumour, which had been operated on nine years before. The metastatic tumour was totally excised. One and a half years later he was found to have multiple left temporal and parietal subarachnoid metastases. Because treatment with bromocriptine for five months and subsequent radiation proved ineffective, the tumour nodules were removed surgically.

Adenoma, Chromophobe↗
PubMed1983

Erythrocyte volume distribution analysis and hematologic changes in dogs with iron deficiency anemia.

Hematologic features were characterized in 12 dogs with iron deficiency anemia attributable to chronic external blood loss. Consistent abnormalities in hemograms included moderate to marked reticulocytosis, decreased mean corpuscular volume, and decreased mean corpuscular hemoglobin concentration. Hypoproteinemia occurred in only four of 12 dogs. Consistent blood film findings included hypochromic cells, leptocytosis, and erythrocyte fragmentation. These dogs had significantly decreased serum iron values (p less than 0.001) and percent transferrin saturation values (p less than 0.001) compared with 33 clinically healthy adult dogs. The total iron binding capacity values of these dogs were not significantly different (p greater than 0.5) than those of the healthy dogs. Using erythrocyte volume distribution curves, the percentages of microcytic cells (less than or equal to 45 fl) were determined to range from 20% to 82%. Sequential changes in erythrocyte subpopulations were evaluated in four dogs which received iron therapy. The hematologic response consisted of fairly rapid restoration of packed cell volume by production of normocytes followed by a more gradual replacement of residual microcytes by new normocytes.

Anemia, Hypochromic↗