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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. This scan emphasizes

components of human articular tissue including chondrocytes, subchondral osteoblasts, synovial lining cells, ligaments, and lining

component and overall facilitated diffusion. Ependymomas arise from the ependymal cells of the fourth

component and overall facilitated diffusion. Ependymomas arise from the ependymal cells of the fourth

component and overall facilitated diffusion. Ependymomas arise from the ependymal cells of the fourth

component revision has not yet been thoroughly investigated. Thus the surgeon performing revision THA may consider the previously used approach as well as the exposure necessary for the revision during preoperative planning. Page 272Infection Workup and diagnosis PJI remains a leading cause of failure in THA, with

component. The tibial tubercle osteotomy was repaired using 18-gauge wire. Infection workup and diagnosis Infection after TKA exists on a spectrum ranging from mild surgical site cellulitis to overt PJI.16 Any painful TKA should be considered infected until proven otherwise, given the increased risk for morbidity

component with small superior solid nodule (arrow). (D) Postcontrast coronal T1 shows peripheral cyst wall and solid nodular enhancement (arrows). Clinical Differential Diagnoses Common endocrine presentations of hypothalamic and pituitary disorders are central (vasopressin deficient) diabetes insipidus, hypopituitarism, precocious puberty, delayed/early puberty, and amenorrhea. In a patient

component with small superior solid nodule (arrow). (D) Postcontrast coronal T1 shows peripheral cyst wall and solid nodular enhancement (arrows). Clinical Differential Diagnoses Common endocrine presentations of hypothalamic and pituitary disorders are central (vasopressin deficient) diabetes insipidus, hypopituitarism, precocious puberty, delayed/early puberty, and amenorrhea. In a patient

component with small superior solid nodule (arrow). (D) Postcontrast coronal T1 shows peripheral cyst wall and solid nodular enhancement (arrows). Clinical Differential Diagnoses Common endocrine presentations of hypothalamic and pituitary disorders are central (vasopressin deficient) diabetes insipidus, hypopituitarism, precocious puberty, delayed/early puberty, and amenorrhea. In a patient