The following was found on my x-ray: Preserved Lordosis signs of major disc height in L5 with a irregular sclerotic end plate. Narrowed central and spina bifida of L5. Sclerotic changes of s.i. joints bilaterally more on left. Moderate narrowing of both hip joints with sclerotic changes of the acetabulum more on right. Preserved femoral heads.
"Preserved Lordosis" - The lumbar spine has its normal curve, called lordosis.
"signs of major disc height in L5 with a irregular sclerotic end plate." - Is there a word missing here? Did the report say "loss of height"? If so, loss of disc height means the disc is underdoing degenerative changes. It's is getting narrower. The endplate is the part of the vertebral body that is in contact with the disc. Being irregular, again is a sign of degenerative changes.
"Narrowed central and spina bifida of L5." - Spina bifida is a congenital condition (you were born with it). It can range from just the posterior aspect of the vertebra not completely fusing, without any other problems, all the way to the other side of the spectrum, where a baby is born with the lower spinal cord on the outside of the body (and paralyzed). Since this was just picked up on x-ray, it is what is usually called spina bifida occulta, and usually is of no significance, causing no problems. But, without actually seeing the x-ray, it is impossible to tell exactly from the report how significant it is.
"Sclerotic changes of s.i. joints bilaterally more on left." - Sclerosis of bone is where the bone becomes dense and compacted. It is one of the four signs of degenerative changes within a joint. So, the left sacroiliac joint is starting to show early degenerative changes.
"Moderate narrowing of both hip joints with sclerotic changes of the acetabulum more on right. Preserved femoral heads." - This is the part on the hip joints. Narrowing is again one of the signs of degenerative changes. The narrowing means the cartilage is wearing and becoming thinner. The socket (acetabulum) bone is becoming dense (sclerotic). The sclerosis is from years of the the joint undergoing stress of moving, basically compressing the bone under the cartilage. The ball part of the joint is okay.
If you are interested, the four signs of degenerative changes in a joint are: 1) joint space narrowing, 2) sclerosis of the subchondral bone (bone just under the cartilage), 3) cyst formation within the periarticular bone (bone right around the joint), and 4) osteophyte formation (bone spurs).