Examining the Sensory System
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Case application of CT anatomy (3)
Interpret the following CT brain carefully.
Intra-cranial Haemorrhage due to Head Injury
Often, as a consequence of severe head injury, there may be haemorrhage within various intracranial compartments. In these 2 cases (Patient 1 – Figure 1, Patient 2 – Figures 2 to 11), both patients sustained a severe head injury. A combination of subdural , parenchymal and subarachnoid haemorrhage could be seen. In the second case,…
Thymoma
In this contrast thoracic CT scan of a middle-aged woman with newly diagnosed seropositive generalized myasthenia gravis, an abnormal thymic lesion (present in the anterior mediastinal compartment) could be seen (Figure 1). The patient was referred to the Cardiothoracic Surgeons where she received a thymectomy via an open sternotomy. The thymic specimen was sent for histo-pathological…
Heel-shin Test
In this video, the patient exhibits a positive heel-shin test on the right side. Compared to the left (normal) side, the right lower limb is seen to be rather clumsy. The heel-shin test is a test to screen for ipsilateral cerebellar function. Once again, clear instructions are required for this test, and you could see…
Basic anatomy of CT brain
a) Various Densities in Axial Brain CT The normal anatomy of brain is relatively easier to understand with CT than MRI, comparing to radiograph, it can better delineate different soft tissue density – Structures appearing “white” in an unenhanced CT brain can only be the following high density structures : 1. Bone e.g. cranium ( calcium-containing ) 2. Blood in acute bleeding ( later…
