Spot the Diagnosis 621-626

(621) A patient has come with a bony swelling. The swelling has a variant feel at different parts. Spot the diagnosis?

(622) A patient has come with a sinus. The sinus is adherent to the bone.

(623) A child of ten has come with a swelling of bone and high rise of temperature.

(624) A child patient has come with pain and swelling. The pain and swelling has started at the same time.

(625) A patient has come with a swelling of bone. He is having chronic otitis media.

(626) A patient has come who is suspected to be a case of osteogenic sarcoma. The  symptoms started twelve months back.

Answers.
(621) Oesteogenic sarcoma.
(622) Osteomylitis.
(623) Acute Osteomylitis.
(624) Inflammation.
(625) Osteomylitis.
(626) It is not a case of osteogenic sarcoma.