At the reception, the patient is 26 years old, a nurse, with complaints of an increase in body temperature to 38-390Сwithin 5 days. Ill acutely. Start with heat with torrential sweats. Independently received cefazolin at 1.0 x 3 r / d i / m, but without effect. When viewed revealed an increase in the cervical lymph nodes on the left, hyperemia and enlarged tonsils. KLA: Hb 90 g / l, er. 3.3х1012 / l, CPU 0.9; Lake 13.0x109 (eosinophils-6%, basophils -2%, p / nuclear - 14%; seg./toxic - 67%, lymphocytes - 1%, monocytes - 10%), ESR 60 mm / hour. When conducting sternal puncture in the bone marrow Berezovsky-Reed-Sternberg cells were detected. Make a diagnosis.