A 15-year-old girl complains of enlarged cervical lymph nodes and dry unproductive cough. According to the patient's medical history, the disease onset was 6 months ago. Objectively, enlarged lymph nodes form a conglomerate over the left clavicle, they are painless and not fused with the surrounding tissues, the skin above them is unchanged. Other groups of lymph nodes are normal. Auscultation detects vesicular breathing over the lungs, there are no wheezes. The liver protrudes 3 cm from under the edge of the costal arch, the spleen protrudes 2 cm. No pathology has been detected in other organs and systems. What is the most likely diagnosis in this case?