title: Periostitis and pseudoperiostitis.
abstract: Increased metabolic activity with the periosteum is demonstrated radiographically by the presence of a linear shadow of bone paralleling the cortex, most commonly reflecting increased osteoblastic activity and thus representing periosteal new bone. This is frequently seen in psoriatic arthritis and Reiter's syndrome. A similar picture occurs with increased osteoclastic activity and reflects rapid demineralization, simulating periostitis. This change must be recognized as a reflection of osteoporosis, lest the condition be misdiagnosed as inflammatory disease.
mesh_terms: D001168:Arthritis / Q000000981:diagnostic imaging; D016918:Arthritis, Reactive / Q000000981:diagnostic imaging; D001172:Arthritis, Rheumatoid / Q000000981:diagnostic imaging; D001846:Bone Development; D002675:Child, Preschool; D004751:Enteritis / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D008903:Minerals; D010522:Periostitis / Q000000981:diagnostic imaging*; D011565:Psoriasis / Q000000981:diagnostic imaging; D011859:Radiography; D013167:Spondylitis, Ankylosing / Q000000981:diagnostic imaging
chemical_list: D008903:Minerals