Presentación atípica de un caso de fiebre mediterránea familiar

Familial Mediterranean Fever is a periodic hereditary fever syndrome characterised by short fever attacks and multisystemic inflammation (mainly polyserositis and synovitis). The main complication is development of amyloidosis, particularly renal. In the majority of cases, symptoms appear before the age of twenty. It is a monogenic hereditary disease that is related to the MEFV gene. A genetic diagnosis may be helpful, although there are some aspects that are still not clear enough. A small percentage of patients present an atypical form, appearing later and debuting with amyloidosis but without any previous inflammatory attacks or periodic fevers. This form is Familial Mediterranean Fever phenotype II. We present the case of a 24 year-old with renal amyloidosis that presents these characteristics and in whom the genetic study was fundamental for the diagnosis.