Bone metastasis may be the first sign that you have cancer, or bone metastasis may occur years after cancer treatment. Bone metastasis can cause pain and broken bones. With rare exceptions, cancer that has spread to the bones can't be cured. Treatments can help reduce pain and other symptoms of bone metastases.
Medical Definition of Chondrichthyes. : a class comprising cartilaginous fishes with well-developed jaws and including the sharks, skates, rays, chimeras, and extinct related formsâcompare cyclostomata.
1 Chondrichthyes Chondrichthyes are called cartilaginous fish. 2  You can see the clear difference from their cartilage frame. 3  Sharks, skates and rays are the main examples of Chondrichthyes fish. 4  This type of fish usually does not have a connection between the upper jaw and skull.