JAK2V617F mutation and endogenous erythroid colony formation in patients with polycythaemia vera.

Purpose: The purpose of this study was to investigate the frequency of JAK2V617F gene mutation in patients with polycythemia vera (PV) and to compare the results with the presence of endogenous erythroid colony (EEC) formation.

Methods: Peripheral blood and bone marrow samples of 28 patients with PV were analyzed. The diagnosis of PV was established according to the bone marrow criteria of the World Health Organization (WHO).

[Surgical treatment of unicentric plasma cell histological type Castleman's disease].

Introduction: Castleman's disease or angiofollicular lymph hyperplasia is a rare disease with two identified clinical forms. Unicentric or localized form is characterized by isolated growth of lymph nodes, most often in mediastinum, and multicentric form is expressed as systemic disease with spread lymphadenopathy, organomegaly and presence of general symptoms of the disease. Histological types are hyalovascular, plasma-cell and transitive (mixed) cell.

Fine needle aspiration cytology in the diagnosis of head and neck masses: accuracy and diagnostic problems.

Purpose: Fine needle aspiration (FNA) cytology is an established technique associated with minimal complications compared with more invasive techniques such as wide core needle biopsy or open biopsy, and as such, very suitable for obtaining material in the delicate region of head and neck (H&N). The aim of this study was to assess the diagnostic accuracy of FNA cytology H&N masses.

Methods: Aspirations were performed by cytologists using 25 or 27G needles with 20 ml syringes attached, and smears were stained with May-Grunwald-Giemsa.

Hodgkin's lymphoma of the parotid gland: report of a case and literature review.

Hodgkin's lymphoma with its primary manifestation in the parotid gland is a very rare entity. In previously published reports the diagnosis was established by postoperative histopathological examination. The present report describes a case of primary Hodgkin's lymphoma of the parotid gland, diagnosed by fine needle aspiration (FNA) cytology, and includes a short review of the diagnostic approaches to the parotid gland tumors.

[Risk factors in chronic ischemic pancolitis].

Ischaemia of the colon wall leads to lesions that are gathered under entity of ischaemic colitis. Acute or chronic tissue hypoxia is caused by various vascular disorders which could be divided into two large groups: occlusive or non-occlusive. Chronic ischaemic colitis is manifested with necrosis of colon wall, with consequent stenosis of the affected area.