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Protein structure is described at four levels: **Primary structure** — the linear sequence of amino

amino acids, the number of possible protein structures is astronomically large. This structural diversity underlies the enormous variety of protein functions. **DNA** stores genetic information in the sequence

primary and secondary CNS vasculitis, SWS, moyamoya syndrome, and mitochondrial diseases (MELAS). White matter abnormalities can be seen with migraine (Fig. 7.3), demyelinating diseases, leukodystrophies, and metabolic diseases (homocystinuria, Fabry disease). An Axial F L A I R M R I presents multiple small bright areas scattered throughout

primary and secondary CNS vasculitis, SWS, moyamoya syndrome, and mitochondrial diseases (MELAS). White matter abnormalities can be seen with migraine (Fig. 7.3), demyelinating diseases, leukodystrophies, and metabolic diseases (homocystinuria, Fabry disease). An Axial F L A I R M R I presents multiple small bright areas scattered throughout

primary and secondary CNS vasculitis, SWS, moyamoya syndrome, and mitochondrial diseases (MELAS). White matter abnormalities can be seen with migraine (Fig. 7.3), demyelinating diseases, leukodystrophies, and metabolic diseases (homocystinuria, Fabry disease). An Axial F L A I R M R I presents multiple small bright areas scattered throughout

primary TKA is to determine if their symptoms are secondary to the knee replacement itself or resulting from extrinsic sources such as hip arthritis, occult fracture, spinal stenosis, vascular disease, or periarticular bursitis.7 Next, the surgeon must confirm the mechanism of failure. This is of utmost importance because rTKA

structures, while the surrounding subcutaneous fat is brighter in tone. The bone cortex of the tibia and fibula is sharply outlined, and the medullary cavity of the bone is darker. The second scan, labeled B, is a T 2-weighted image or a fat-saturated sequence

protein, fluid, and electrolyte requirements. Cycling is best done over 2 to 4 days by reducing a 24-hour infusion in increments of 4 to 6 hours at a time (eg, from 24–20 to 16–12 hours or from 24–18 to 12 hours). Certain patients may tolerate

protein (CRP) • Vitamin D • Calcium • Thyroid stimulating hormone, free T4 Nutrition evaluation Of patients undergoing primary or revision total joint arthroplasty (TJA, referring to both hip and knee arthroplasty), 8.5% to 50% have been reported to have laboratory values indicating malnutrition.8-10 Preoperative malnutrition has been associated with adverse

structures such as inguinal hernias and the genitourinary system.22 In females, vaginal prolapse, endometriosis, ovarian torsion, uterine fibroids, and genitourinary cancers can present with groin pain as the initial symptom.23 For patients with a chief complaint of instability, the number of dislocations, the timing of the first event relative