Pseudothophus form of calcium pyrophosphate deposition disease: Features of diagnosis and course of the disease (description of a clinical case)

Calcium pyrophosphate deposition disease (CPPD) is a disease that occurs under the guise of various diseases and is characterized by a variety of clinical forms. One of the most rare and diagnostically difficult variants is chronic arthritis with the formation of periarticular deposits of calcium pyrophosphate crystals, imitating gouty tophi. The article presents a clinical case and analysis of the differential diagnosis of a patient with a pseudo-tophaceous form of CPPD.