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Query: UMLS:C0032463 (polycythemia vera)
 3,374 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The approach to diagnosis and classification of patients with polycythemia is reviewed with presentation of general and specific guidelines for the management of patients with polycythemia vera, secondary polycythemia and relative polycythemia.
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PMID:Polycythemia: evaluation and management. 265 Jul 77

A hospital-based study of the relationship between the hematocrit and thrombotic stroke was carried out among 117 patients admitted to Ramathibodi hospital. There was no significant difference in the age of patients with and without CT scan. Six patients, three males and one female with CT scan and one male and one female who did not have CT scan were found to have polycythemia vera. Ten patients had relative polycythemia (five had CT scan and five without CT scan). The mean age of patients with PV and relative polycythemia was not significantly different from those without polycythemia. The mean Hct in those with PV and relative polycythemia was generally higher than those without polycythemia. We recommended that Hct should be determined in every thrombotic stroke and a high Hct should be further studied for evidence of polycythemia vera or relative polycythemia.
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PMID:Hematocrit in thrombotic stroke at Ramathibodi Hospital. 273 92

Bone marrow sections from posterior iliac crest aspiration and/or trephine specimens have been examined in 39 patients with true polycythaemia, along with a variety of other clinical and laboratory data. The emphasis has been on objective assessment of cellularity and megakaryocyte concentration in a prospective four year study. In patients with untreated primary polycythaemia mean cellularity was 87.0% and 86.4% for aspirate and trephine specimens compared with 55.5% and 48.7% for secondary cases and 48.3% and 45.5% for controls. Eighty per cent of primary polycythemia patients had moderate to marked megakaryocytic hyperplasia. We conclude that, in the presence of an elevated red cell volume, marrow cellularity of greater than 75%, particularly when accompanied by megakaryocytic hyperplasia, of iliac crest aspirate or trephine specimens is sufficient per se to establish a diagnosis of polycythaemia rubra vera.
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PMID:The differential diagnosis of polycythaemia--a bone marrow study (the bone marrow in polycythaemia). 274 31

In a prospective open study 16 consecutive patients with a myeloproliferative syndrome and thrombocytosis were treated with interferon (IFN) alpha-2a. 4 patients had polycythemia vera, 4 essential thrombocythemia, 3 myeloid metaplasia and 5 chronic granulocytic leukemia. Platelet counts decreased in all treated patients within 2 to 12 weeks from a median value of 1010 x 10(9)/l to 350 x 10(9)/l. No primary or secondary resistance was observed. The initial dose of IFN was 9 m U per day. After correction of the thrombocytosis, it was progressively reduced to a minimum dose of 3 m U per week. Despite the good platelet response to IFN, leukocytosis persisted in 3 patients and polycythemia in a further 3. Side effects and poor compliance required discontinuation of therapy in 6 patients. Special attention is focused on the follow-up in 6 patients who have been treated for more than 15 months.
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PMID:[Therapy of thrombocytosis in myeloproliferative syndromes using recombinant interferon-alpha-2a]. 279 42

A new abnormal hemoglobin, Hb Villejuif [beta 123(H1) Thr----Ile] has been discovered during the exploration of a polycythemia in a 87-year-old patient of French origin. The isoelectric focusing of the lysate revealed the presence of a variant hemoglobin with an isoelectric point very close to that of HbA. The oxygen binding properties of the patient's red blood cells being normal, it was clear that the polycythemia was not a consequence of the presence of this hemoglobin. In fact, the red blood cell morphology and the involvement of the other blood cell lines, demonstrating excessive hemopoiesis, led to the diagnosis of polycythemia vera.
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PMID:Hemoglobin Villejuif [beta 123(H1) Thr----Ile]: a new variant found in coincidence with polycythemia vera. 281 24

Clinico-laboratory and radionuclide (radio-hepatography with 131I-rose bengal and liver scanning with 198Au colloid solution) investigation of liver function was performed in 110 patients with polycythemia vera during exacerbation, in 16 patients with symptomatic erythrocytosis (10--chronic pulmonary disease, 3--polycystic kidney, 2--obesity, 1--peptic ulcer), and in 11 patients with a polycythemic form of myelofibrosis. The results of the radionuclide method showed disturbed liver function in 51 (46.3%) patients with polycythemia, in 4 patients with myelofibrosis and in 3 with erythrocytosis which were characterized by a decrease in hepatocytic absorptive-excretory function and a decrease in the activity of the reticulo-histiocytic stroma. Liver changes depended on a stage of disease and were detected earlier than with the use of biochemical methods. As distinct from erythrocytes, one-type disorders were noted in the patients with myelofibrosis. Correlation in the lever of RP accumulation in the spleen, its sizes and stage of disease was established. Liver function returned to normal after cytostatic therapy in the patients with stage IIA polycythemia, partially IIB stage, during remission.
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PMID:[Radionuclide study of liver function in polycythemia vera and other types of polycythemia]. 282 15

A 65-year-old woman developed severe chorea as the presenting symptom of the hyperviscosity syndrome together with polycythemia vera and an ovarian cyst. Whole blood viscosity was 69.5 centipoise at a shear rate of 1.1 s-1 (normal 12.0-22.0 centipoise). After four phlebotomies the chorea subsided completely, and the blood viscosity became normal. Hemoglobin level was stable at normal range and then increased to 18.0 g/dl with recurrence of the faciobuccal dyskinesia that disappeared promptly following the phlebotomies. This case emphasizes that in elderly patients with neurological disorders, such as chorea, polycythemia should be strongly considered as one of the treatable causes.
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PMID:Chorea in polycythemia vera: a rare presentation of hyperviscosity. 291 3

Bone marrow fibrosis is a characteristic finding in agnogenic myeloid metaplasia and in the spent phase of polycythemia vera. It is commonly believed that the reticulin deposition is irreversible. However, we report four patients who demonstrated clinical and laboratory evidence of transition from myelofibrosis to polycythemia. The transition was documented by improvement in the hemoglobin concentration and by determination of the Cr51 red blood cell mass, accompanied by a resolution of the fibrosis on serial bone marrow biopsies. Two of the patients had been treated with alkylating agents and splenectomy, one with myelosuppressive therapy without splenectomy, and one with splenectomy alone. These findings indicate that bone marrow fibrosis in the chronic myeloproliferative disorders is not always an irreversible phenomenon. Pathogenetic implications will be discussed.
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PMID:Reversal of bone marrow fibrosis and subsequent development of polycythemia in patients with myeloproliferative disorders. 292 85

The haematological, biochemical and clinical features of six patients with polycythaemia after renal transplantation were studied. The patients had an absolute increase in red cell mass, but normal plasma and whole blood volumes. Primary proliferative polycythaemia was excluded. Polycythaemia developed within one year of transplantation and persisted for 3-7 years. Chronic rejection, renal artery stenosis, severe hypertension and corticosteroid therapy were probably not the cause of the polycythaemia. There were no occlusive vascular lesions during the observation period and venesections were generally not required. The polycythaemia is probably the result of the cumulative production of erythropoietin by the donor and recipient kidneys.
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PMID:Polycythaemia after renal transplantation. 331 62

The present paper describes the case of a patient who developed a B-cell chronic lymphocytic leukemia (B-CLL) 15 months after the diagnosis of polycythemia vera, which had been treated only with phlebotomies. In spite of lymphocytosis and the clinical signs and symptoms of leukemia, the patient exhibited at the same time presumptive elements of polycythemia (high LAP index levels, a high number of neutrophils). Cytogenetic investigations, carried out after the appearance of B-CLL, revealed the presence of an unusual abnormality (18 p+) both in bone marrow not stimulated by mitogens and in PWM-stimulated circulating lymphocytes. This case, which is the ninth of its kind described in the literature, offers some interesting observations about the association between myeloproliferative and lymphoproliferative syndromes.
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PMID:Chronic lymphocytic leukemia (B-cell) in the course of polycythemia vera. Description of a case with an unusual chromosomic anomaly. 332 9


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