Thanks for writing to us.
The condition you are referring to probably falls under a Cartillagenous -bony overgrowth usually occuring near a joint and we doctors call it an "Exostosis".This is technically referred to as a benign tumour called"Osteochondroma".This usually develops during childhood to adolescence on the bony growth plate.as it is a benign growth no treatment is usually required.
(B)Costochondritis;-Usually a sterile inflammation that responds to NSAIDs and occurs in the junction of rib with a cartillage.Tietz Syndrome.
When there is a rapid growth/painful/obstructing a blood vessel/compressing a nerve/causing tingling
and numbness--Neurovascular symptoms develop the orthopedic intervention is required in the form of Surgery termed as "Excision"(Biopsy-HPE
Kindly consult an Orthopedic Surgeon who will investigate the same with X-Ray/CT-Scan/MRI
as per the merit of the case and advise you
further Management based upon the results. Sometimes Bone Biopsy results may be required if Chondrosarcoma is suspected.
Wishing you a speedy recovery.
Dr Lt Cdr ASN Bhushan.