Is bone tumor cyst hypophosphatasia osteomalacia haematopoiesis or osteoporosis a skeletal disorder?

Bone cysts and hypophosphatasia are both skeletal disorders. Bone cysts are fluid-filled sacs that develop in the bone, while hypophosphatasia is a genetic disorder that causes the body to produce too little of the enzyme alkaline phosphatase, which is necessary for the mineralization of bones. Osteomalacia, haematopoiesis, and osteoporosis are not skeletal disorders. Osteomalacia is a condition in which the bones become soft and weak due to a lack of vitamin D, while haematopoiesis is the process of blood cell formation in the bone marrow. Osteoporosis is a condition in which the bones become thin and brittle due to a loss of calcium and other minerals.