Flexor tendon graft repair graft is taken from ?

Ans. is 'd' i.e., Rheumatoid ahritis Beside covering the bone and sharing some of its blood supply with the bone, periosteum (paicularly cambium layer) also produces bone when it is stimulated. Practically anything that breaks, tears, stretches, inflames or even touches the periosteum, stimulates the reactive bone formation by periosteum. This is called periosteal reaction. Differential Diagnosis of Periosteal Reaction Ahritis Psoriatic ahritis Reactive ahritis Metabolic Hyperophic pulmonary osteoahropathy Thyroid acropathy Congenital Pachydermoperiostosis Periosteal reaction of newborn Trauma Stress fracture Fracture Drugs Fluorosis Hypervitaminosis A Prostaglandins Tumors Osetosarcoma Ewing's sarcoma Chondroblastoma Eosinophilic granuloma Osteoid osteoma Leukemia and lymphoma Infection Genetic Caffey disease Vascular Venous stasis Neuropathic ahropathy is also associated with periosteal reaction.