im pretty sure that is male pattern baldness unfortunatly, the temples have quite receeded. The top is a bit thin, but that can also attribute to lighting. Have a talk with a dermatoligist and see what they think.
I'm 18. Ive had the same hairline and lack of hair in top right corner since i was 13/14 i believe (def. around 16). The lack of right hair goes straight down my side forming a parting. For family hair history, My dad has had a receeding hairline since 30 and its very slowly receeded. Hes 54...