2020年10月26日 · Widening of the diploic space refers to expansion of the cancellous (spongy) bone between the inner and outer tables of the calvaria. The diploic space is the medullary cavity of the skull, and a location of normal physiologic hematopoiesis in adults.

The skull changes of patients with chronic anaemia are due to red marrow hyperplasia and consist of widening of the diploic space, and thinning and obliteration of the outer table. Before diploic widening, a coarse granular or stippled pattern can be seen in the upper parietal region.

2021年7月1日 · MRI is more sensitive for early detection of cranial osteomyelitis, which is characterized by an edema-like signal intensity alteration of the diploic space (decreased signal intensity on T1-weighted images and increased signal intensity on …

2024年8月17日 · The hair on end sign refers to a radiographic appearance of the diploic space of the skull vault which results from a thickening of trabeculae as the diploic space expands. These trabeculae are perpendicular in orientation, interspersed by …

2016年8月27日 · The diploic space is the marrow-containing area in the skull vault between the inner and outer layers of compact/dense bone. In adults, in whom yellow marrow has supplanted the red marrow of childhood (or in whom there is simply a greater proportion of yellow marrow), this space is visualized as increased SI on T1WI.

2002年2月1日 · Midline (A) and parasagittal (B) non-contrast-enhanced T1-weighted MR images (500/11/1) in a 73-year-old healthy woman show the normal high signal intensity of the diploic space due to fat, the major constituent of adult marrow. The mild heterogeneity and thickening of the diploic space is common in older patients.

Some VL can enlarge, extending from the skull inner table into the diploic space, providing a lytic image of the skull on CT scan (Fig. 2). They behave as pure vascular entities, with contrast enhancement on both CT and MRI.

Computed tomography and conventional radiographic imaging typically demonstrate a well-defined osteolytic lesion involving the diploic space expanding the outer table with a sunburst or honeycomb trabecular pattern.

2023年1月30日 · Although the calvarium is a monolayer structure at birth, the diploic space emerges around the fourth year, giving it its characteristic double-layer form. The skull base forms the floor of the neurocranium on which the brain sits smoothly.

2020年5月28日 · As the skull matures, the diploic space matures and a separate and distinct cortex develops for the inner cortex and another for the outer table, with trabeculae and marrow-containing spaces developing throughout the diploic space.