QUIZ: Which rare but distinctive facial disease is seen on this...

QUIZ: Which rare but distinctive facial disease is seen on this 3D CT image? Click for ANSWER

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Tree in bud sign - describes the CT chest appearance of multiple...

Tree in bud sign - describes the CT chest appearance of multiple centrilobular nodules that are connected by branching opacified bronchioles. Although initially described in patients with endobronchial tuberculosis, it is now recognised in a large number of conditions ranging from small airways infections like mycobacterium avium complex, to connective tissue diseases like rheumatoid arthritis, to neoplastic conditions like bronchioloalveolar cell carcinoma.

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Winking owl sign - vertebral metastases are common in oncology...

Winking owl sign - vertebral metastases are common in oncology patients. A reliable sign of osteolytic spinal metastases on AP radiographs is loss of the normal pedicle contour. The appearance of unilateral pedicle absence has been likened to that of a winking owl with the missing pedicle being the closed eye, the contralateral pedicle being the open eye and the spinous process being the beak. In the above example a metastasis has obliterated the left pedicle at T11. The T12 pedicles are outlined as a reference point.

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