[Amyloidosis - The pathologist's perspective].

Despite the advent of scintigraphic diagnosis of transthyretin amyloidosis, the role of pathologists remains central for the diagnosis and typing of amyloidosis. The anatomo-pathological diagnosis and typing of amyloidosis are hindered by pitfalls that should be known, linked to the Congo red staining (technical implementation and interpretation) and the difficulties of immunohistochemistry. The use of expert centers is recommended for difficult cases and when the type cannot be confirmed.