Cystic Chondroblastoma of Patella

Abstract

Benign chondroblastoma involving the patella is a rare condition, being reported only 10 cases in Japanese literature. Benign chondroblastoma associated with cystic change is called as cystic chondroblastoma (Schajowicz) and one of the extremely rare conditions, which is sometimes difficult to be distinguished from aneurysmal bone cyst.
In Japanese literature, to our knowledge, only 2 cases of cystic chondroblstoma in the patella have been reported so far.
In the present paper one case of cystic chondroblastoma involving the patella was reported with special reference to its pathological aspects. The comparison with the cases presented in world literature was also included.