The simplest type of fracture; bone is partly bent, but not completely separated:

The bone is snapped in two but doesn't break the skin

Woven bone is normally seen in adults during:

Achondroplasia is caused by mutation in which gene?

Achondroplasia mainly affects which process?

A typical clinical feature of achondroplasia is:

Osteogenesis imperfecta is caused by defective synthesis of:

Blue sclera is a feature of:

Osteopetrosis is due to failure of which cell?

Bones in osteopetrosis are best described as:

Paget disease of bone usually affects which age group?

A characteristic histological feature of Paget disease is:

Which enzyme level is typically elevated in active Paget disease?

Osteoporosis is characterized by:

The most common fracture site in osteoporosis is:

Osteomalacia is primarily caused by deficiency of:

A histological feature of osteomalacia is:

Rickets differs from osteomalacia because it occurs in:

Excess parathyroid hormone causes:

Brown tumors are seen in:

Renal osteodystrophy is caused by:

The first stage of fracture healing is:

The most common causative organism of pyogenic osteomyelitis is:

Dead bone separated from living bone in osteomyelitis is called:

What is the most likely diagnosis?

The most likely underlying diagnosis is:

A 69-year-old man has long-standing back and leg pain. He has difficulty hearing and reduced hip movement. His hat size has increased. X-rays show dense, sclerotic bones, and his serum alkaline phosphatase is elevated. What is the most likely diagnosis?

A 4-year-old child presents with bowed legs and widened costochondral junctions. Blood tests show low vitamin D and low serum calcium. Which of the following best explains these findings?

An elderly postmenopausal woman has back pain, height loss, vertebral compression fractures, and thin trabeculae with normal mineralization. What is the diagnosis?