Pima Medical Institute
May 19, 2014
Daniel was an aspiring college athlete. Since a young age all he wanted to do was be a professional basketball player. During practice one day he took a fall and injured his knee. Thinking nothing of it, he went home and did the usual regime. Plenty of ice, elevation, and over the counter pain meds did nothing for the pain. After several days, Daniel decided to see his physician and get his knee checked out so he could be in condition for his tryouts at the end of the month. After the physical examination, it was the physicians orders to have get an MRI scan done to see what was going on inside of Daniels knee. After doing the MRI, it was discovered that he suffered from Chondroblastoma, a rare bone tumor disease that only encompasses 1% of all bone tumors.
Chondroblastoma's are a rare type of non-cancerous tumor that will typically develop at the end of long bones. Usual sites include the thighbone and the upper arm bone. When found around the knee they will be at the end of the femur, or they can be at the top of the tibia (shinbone). They can also be found at the top of the humerous (upper arm bone). When found at the shoulder on the humerous, they are referred to as Codman's Tumor. Other places they have been documented are the heel, pelvis, and hip. The tumor is made out from Chondroblasts, which is where it received its name. Chondroblasts are immature cartilage-forming cells.
Chondroblastoma is a rare type of benign (noncancerous) bone tumor that originates from cartilage. Cartilage is the specialized, gristly connective tissue and the tissue from which most bones develop. Cartilage plays an important role in the growth process. There are many different types of cartilage that are present throughout the body. Chondroblastoma's most often affects the ends of the long bones, near the growth plate, in the arms at the shoulder, and in the legs at the hip and knee. In young children, where Chondroblastoma are more prevalent, the ends of the long bones contain a small section of cartilage called a cartilaginous plate(growth plate) which is detrimental to bone growth. Once a child reaches skeletal maturity, the cartilage will mostly be changed into bone. Chondroblastoma's are typically found in men twice as often as women. 80% of cases were found in patients under 25 years of age, though cases as young as 2 and old as 83 have been documented. Chondroblastoma's are one of the few benign bone tumors that can metastatasize to the lungs, though it is an uncommon occurrence.
The cause of Chondroblastoma's are unknown, though many have speculated there caused by Chondroblasts. Chondroblasts are immature cartilage-forming cells. These tumors are unable to make normal cartilage. Rarely, cells from a Chondroblastoma can metastasize and spread to other areas of the body, most commonly the lungs....