This is another case provided by my former neuropathology co-fellow, now colleague Derek Mathis M.D.
This was an 18-year-old female who was found to have mass in foramen magnum, impinging on the cervicomedullary junction. Neurosurgical intervention followed shortly.
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| Sagittal T1 |
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| Sagittal T1, post-gadolinium |
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| H&E, intermediate magnification |
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| H&E, high magnification |
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| Mystery immunostain |
It's not a difficult diagnosis to make. The diagnosis hinges upon recognizing a focal yet interesting feature of the neoplastic cells, and remembering why the "mystery immunostain"would use a red chromogen.
