1 Boils are infected hair follicles that look like red, raised bumps on the skin. They can be painful, but they eventually go away once they burst and release fluid.  Cold sores are red, fluid-filled bumps that form around the mouth or other areas of the face, which can burst.
The osteoclasts are a type of bone cells. The bone cells are found within the bone tissues, and they are responsible for the make-up of the skeleton of vertebrates. The four main types of bone cells are the (1) osteoclasts, (2) osteoblasts, (3) osteocytes, and (4) lining cells. The osteoclasts, in particular, are large, multinucleated cells that are involved in the absorption and removal of bone, particularly dissolving the fibers and the matrix of bone.
Overview. An osteoblastoma is an uncommon primary neoplasm of the bone that has clinical and histologic manifestations that are similar to those of an osteoid osteoma; therefore, some consider the 2 lesions to be variants of the same disease, with osteoblastoma representing a giant osteoid osteoma.resentation and natural history. Osteoblastoma is typically seen in the second decade of life, with a male predilection. Approximately 40% of all osteoblastomas are located in the spine. The tumors usually involve the posterior elements, and 17% of spinal osteoblastomas are found in the sacrum.