PMC5559658_01
Magnetic resonance imaging of a 9-cm jugular paraganglioma invading the skull base, carotid vessels, and the mastoid part of the temporal bone.
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F1
A right jugular paraganglioma was diagnosed more than 30 years ago, and its extension affected several vital structures (Figure 1).
Submucosal deposits of eosinophilic material in extracellular spaces and on the wall of the vessels, with apple-green birefringence after Congo red stain.
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F2
A histologic assessment of the affected colon biopsies showed extracellular eosinophilic deposits in the submucosa and vessel walls, with apple green birefringence with Congo red stain, indicative of amyloidosis (Figure 2).
Immunohistochemical staining of the vessel walls positive for AA-type amyloid deposits.
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F3
An immunohistochemical stain was positive to AA-type amyloid (Figure 3).