Rare Clinical Masks of Amyloidosis

Amyloidosis is a group of diseases characterized by the deposition of a protein having a fibrillar structure in the organs and tissues of the body. The main difference between amyloid is a high ordering of the structure, which manifests itself in the ability to birefringence in combination with dichroism, i.e. a change in the red colour of amyloid deposits to apple green in polarized light. Today, the disease has stopped to be a rare one, but the similarity of clinical data with well-known diseases increases the timing of diagnosis, affects the prognosis and survival of patients. Rare forms of amyloidosis, the description of which is reflected in this article, deserve special attention.