Ivan Valkov

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A total number of 248 bone marrow trephine biopsies were reviewed and 21 paired biopsy and touch imprints were identified to estimate the role of these two diagnostic methods for detection of tumor metastases from nonhematologic malignancies in the bone marrow. The study period ran between January 1, 1993, and June 1, 1996. Eight histology sections and(More)
The objective diagnosis of thoracic outlet syndrome (TOS) remains a challenge. The purpose was to present our experience and discuss the utility of electromyography, electroneurography and somatosensory evoked potentials after ulnar nerve stimulation in patients with surgically verified neurovascular compression at the thoracic outlet. Twenty patients(More)
A case with a complex chromosome abnormality with a t(2;2)(p23;q23) in CD30+/Ki-1+ anaplastic large cell lymphoma (ALCL) is described. This chromosome aberration has not been reported previously in neoplastic diseases and was associated with T-cell phenotype and involvement of the nasopharynx by the tumour.
An Opton cytophotometer was used for a comparative morphometric study on mesothelial and tumour cells obtained from pleural effusions. Tumour cells coming from malignant neoplasms with epithelial or mesenchymal origin were measured. Slides stained after Ambs X Grönemeyer and Smetana methods revealing RNP structures have been used. Both methods were valuable(More)
Fine-needle aspiration biopsy has been employed to establish morphologic diagnoses in abdominal and retroperitoneal tumors in 54 infants and children. A 0.4-0.7-mm gauge needle was used; the puncture was performed through the anterior abdominal wall in the abdominal tumors and by the lateral approach in the retroperitoneal tumors. Malignant tumors were(More)
In the current paper is presented an application of the InterCriteria Decision Making (ICDM) approach to data connected with integrated public transport system of the city of Burgas. The aim is to analyze the data on passenger flow for each month and then to analyze the correlations between pairs of bus lines with the InterCriteria Analysis Method. As a(More)