А.V. КОSTERINA Kazan State Medical University, 49 Butlerov St., Kazan, Russian Federation, 420012 Коsterina A.V. — Assistant of the Department of Hospital Therapy, tel. +7-917-273-77-68, e-mail: avakost@mail.ru The article presents the clinical and laboratory criteria of differences of primary and secondary polycythemia, causes and classification of secondary polycythemia. A clinical case of secondary polycythemia is […]