Note the white spots around the knee joint in this x-ray which represent the small bone islands inside the medullary cavity, characteristic of osteopoikilosis.

Bone islands (white spots) are seen clustered around multiple joints in this x-ray of the pelvis consistent with osteopoikilosis.

My dad is a radiologist and he suggested that we start our medical theme with the word osteopoikilosis. Some diseases are best shown with medical imaging, which is what my dad is an expert in. This disease is a great example.

Osteopoikilosis is also known as “spotted bone disease.” Bone is made of two major parts: the cortical bone, which is on the outside, and the medullary bone, which is on the inside. When cortical bone forms islands inside the medullary bone in multiple locations in the body, osteopoikilosis occurs.

The disease is associated with symptoms such as joint pains, rashes, syndactyly (when digits fuse together), and dwarfism. It has a characteristic look on x-ray with bone islands concentrated around joints.

Osteopoikilosis comes from the Greek roots osteo- meaning bone, and poikilo- meaning spotted or variegated. The suffix -osis meaning condition of. Osteopoikilosis literally means “condition of spotted bone.”