Hi thanks for your question.
The lump on left side of neck your brother is having most probably could be an enlarged cervical ltmph node secondary to his ear and throat infection
.Lymph nodes get enlarged when ever there is infection in their vicinity.Chances of this lump to be a cancer are very less as this is associated with ear infection
(infection of throat) although cannot be ruled out altogether.Cancer can be ruled out only by biopsy
Hope this answers your question.