30mnths female cervicalmass extendinginto mediastinum

A 15 yr male child came to opd c/o fever for 30 days,not associated with chill n rigor,only evening rise of temperature and cough for 25 days, associated with sputum and breathlessness.then there occurred loss of appetite and loss of weight.. here is his chest x-ray P/A view .. please give D/D according to the symptoms and x-ray...I will post other investigation report after the discussion... thank you

M51. sternal sutures present. prosthetic mitral valve in situ. a left parahilar mass lesion situated at antero- superior mediastinum for last 4yrs with CT scan finding as Thymolipoma. DD please.

11 year old boy presented with a large lt sided cervical swelling with facial congestion for 3 months. No other associated symptoms. On examination, the swelling is soft, oval, measuring 18*15 cm, on the lot side of the neck, extending to the mediastinum, causing tracheal shift to the right. No axillary or inguinal lymph node enlargement. No hepatosplenomegaly. All blood investigations done 3 months ago were done and showed nothing abnormal. Ultrasound shows enlarged cervical lymph nodes. X-ray as shown above. Patient was admitted for further assessment. What is your plan?

16 yrs old female with cough, fever, back pain and chest pain for last 1 month