PMC4899699_01
14-year-old male with traumatic lipohemarthrosis of the wrist joint. MRI appearance of lipohemarthrosis. Axial, fat-saturated, T2-weighted image at the level of the proximal carpal row demonstrates lipohemarthrosis. Note the three different signal intensities of fat, serum, and the dependent red cells. Anterior or top layer (white asterisk) is of low signal intensity and represents fat. The first fluid-fluid level (arrow) shows the fat floating above the near-water density of serum (curved arrow). The second fluid-fluid level (arrowhead) separates the serum layer (curved arrow) and the dependent red cell layer with high hemoglobin and iron content (black asterisk).
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Fat within the joint fluid was definitely identified using the fat-saturation technique (Fig. 1). Double fluid-fluid levels were seen on both T1 as well as T2 sequences (Figure 1, Figure 2).
14-year-old male with traumatic lipohemarthrosis of the wrist joint. MRI appearance of lipohemarthrosis. Sagittal, T1-weighted image at the level of the capitate bone redemonstrates the lipohemarthrosis. The fat, serum, and dependent red cells are seen as three different signal intensities. The top layer (white asterisk) is of higher signal intensity on this image when compared to the fat-saturated image (Fig. 1). This is consistent with fat density. The first fluid-fluid level (arrow) shows the fat layer floating above the near-water density of serum layer (curved arrow), as in Fig. 1. Again, as seen in the first figure, the second fluid-fluid level (arrowhead) separates the serum layer (curved arrow) and the dependent red-cell layer with high hemoglobin and iron content (black asterisk).
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Double fluid-fluid levels were seen on both T1 as well as T2 sequences (Figure 1, Figure 2).
14-year-old male with traumatic lipohemarthrosis of the wrist joint. Coronal, T1-weighted image shows the distal scaphoid fracture (arrow).
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14-year-old male with traumatic lipohemarthrosis of the wrist joint. Volume-rendered image (coronal) obtained from the original dataset redemonstrates the fracture line (arrow).
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