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A head within a head sign: a manifestation of healing nutritional rickets.
Trop Doct
July 2014
Associate Professor, Department of Obstetrics and Gynaecology, UCMS and GTB Hospital, India.
The epiphyseal perichondrium is calcified during the rachitic healing process and visible radiologically as 'a head within a head' around the proximal femoral epiphysis in young children. Seen in isolation, these radiographs can pose diagnostic dilemmas.
View Article and Find Full Text PDFA head-within-a-head.
Clin Nucl Med
February 1998
Department of Radiology, Maimonides Medical Center, Brooklyn, New York 11219, USA.
Twenty one patients with a delayed diagnosis of congenital dislocation of the hip were studied to assess the relevance of radiographic changes in the ossific nucleus of the proximal femur during the first year following treatment. All abnormal hips demonstrated sclerosis of the margins of the ossific nucleus with irregularity of its surface at three months following surgery. In nineteen patients a head within a head was identified.
View Article and Find Full Text PDFTo investigate the correlation of radiological and pathohistological changes with radionuclide (99mTc-methylene diphosphonate) uptake, avascular necrosis of the femoral capital epiphysis of puppies was produced after the modified method of Henard and Calandruccio, by casting the hip joint in the position of hyperextention, full internal rotation and abduction for eighteen to twenty hours. Seventy-six puppies were divided into three groups according to frequency and time intervals of casting; in group A the animals were cast once, in group B cast twice with one week interval between the 1st and 2nd casting and in group C cast twice as group B but with four-week interval. Radiological, pathohistological changes and RI uptake in the capital femoral epiphysis were sequentially studied at certain intervals (1, 3, 5, 9, 15 and 20 weeks after the 1st casting).
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