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Biomedical subjects

U Meyer

Publications and source records attributed to U Meyer.

187 records · Page 11Linked to original sources
PubMedDate not supplied

[Acute multifocal gastric hemorrhage in non-Hodgkin's lymphoma of the upper digestive tract in a 7-year-old female].

The acute gastric bleeding of children out of multifocal ulcers is an unusual leading symptom of systemic malignancy. Lymphomas of the gastrointestinal tract in children mostly are localized in the ileocoecal region and seldom in the stomach. The Zollinger-Ellison syndrome - only sporadically seen in childhood - is the first differential diagnosis. Therapy of acute ulcer bleeding consists of oversewing and medical prophylaxis of relapse and covers the directions of therapy of Zollinger-Ellison syndrome. Specific therapy of malignant lymphomas including polychemotherapy and radiation isn't possible before end of wound healing.

Child↗
PubMedDate not supplied

[Biocompatibility of a new ionomer bone cement in endoprosthetics. In vitro testing using a mixed bone cell culture].

Periosteal derived bovine osteoblasts and osteoclasts migrated in culture onto an ionomeric cement, currently evaluated as a cement for orthopaedic implants. Cell cultures were maintained for 4 weeks and used to study the in-vitro behaviour of cells on the material surface. Osteoblasts and osteoclasts colonized the substrate in monolayers and exhibited their phenotypic morphology. Differentiation into both cell lines were demonstrated by immunostaining. Staining for aluminium in cells growing on the bone cement showed an uptake and storage of aluminium in the cells. EDAX-microanalysis revealed high concentrations of Al and Si in the periosteal tissue. Despite uptake of Al in the cells, signs of toxicity were not apparent in the cell culture system.

Aluminum↗
PubMedDate not supplied

Impaired renal function and tumor lysis syndrome in pediatric patients with non-Hodgkin's lymphoma and B-ALL. Observations from the BFM-trials.

OBJECTIVE: Tumor lysis syndrome and renal failure remain important complications early in the course of therapy for pediatric Non-Hodgkin's lymphoma (NHL), frequently leading to therapeutic alterations. In the presented series, children with NHL and tumor lysis syndrome are retrospectively analysed regarding clinical features of acute renal failure and its implications on therapy. PATIENTS AND METHODS: From 4/1990 to 10/1997, 1192 patients diagnosed of any form of NHL have been registered in the NHL-BFM trials. 63 of these patients were reported to have suffered from impaired renal function and/or tumor lysis syndrome before or during initial treatment. Clinical data of these patients were analysed regarding diagnosis, stage, tumor mass, therapy and complications. RESULTS: 62 of 63 patients with impaired renal function and/or tumor lysis syndrome were diagnosed of Burkitt's lymphoma or B-ALL; 58 (92%) of these patients had advanced stages of disease and high LDH-levels (> 500 U/l). 43 of 63 patients had already signs of impaired renal function at admission. Hyperuricemia was the commonest cause of impaired renal function. Renal infiltration or enlargement was observed in 27 of 63 patients. 6 patients were diagnosed of urinary tract obstruction. 25 patients required hemodialysis. Despite improved renal function before administration of MTX, 21 of 63 patients suffered from protracted MTX-elimination during the first course of therapy. 7 of 63 patients (11%) with tumor lysis syndrome died of sepsis after the first course of therapy, another two patients died within 48 hours of therapy due to electrolyte imbalances. CONCLUSIONS: In pediatric NHL-patients, Burkitt's lymphoma and B-ALL appear to be the commonest cause of metabolic complications early in chemotherapy. Patients with advanced stages and large tumor mass are at high risk for renal failure. Impaired renal function predisposes patients to further complications and toxic death. Prophylactic use of urate-oxidase in all patients with advanced stage NHL might limit the incidence of tumor lysis syndrome. Prospective studies on renal function prior to and during therapy are required in order to develop a clinical profile reliably detecting patients at risk for developing renal failure and subsequent complications.

Acute Kidney Injury↗
PubMedDate not supplied

The role of lipid-associated sialic acid (LSA) and prostate specific antigen (PSA) in the follow-up of prostatic cancer.

According to the most recent US cancer statistics, prostatic cancer almost equals lung cancer as the most frequent cause of death from cancer in men. The search for diagnostic methods as well as control examinations have therefore gained great importance. The present study reveals that--in addition to rectal touch, sonography and biopsy of the prostate--the determination of both PSA as organ-specific marker and lipid-associated sialic acid (LSA) as a general tumor marker, is well suited for follow-up and monitoring treatment. With regard to the follow-up, the combined determination of PSA and LSA in serum of patients with prostatic cancer achieves a higher sensitivity as compared to PSA alone (increase of 30-40%). LSA is a good indicator for the presence of metastases. Therefore, the determination of LSA should become an integral part of treatment monitoring and detection of metastatic disease in patients with prostatic cancer.

Biomarkers, Tumor↗