Methotrexate (MTX) is an effective drug used to treat various diseases, especially rheumatological diseases. However, myelosuppression is a severe side effect, the frequency of which increases in patients with renal insufficiency. Here, we presented a chronic hemodialysis patient who developed pancytopenia and mucositis after using low-dose MTX to treat psoriasis.

Although it has been reported rarely in the literature in patients who develop acute kidney injury after COVID-19 disease, ANCA-related vasculitis should also be kept in mind. Thus, it is possible to reduce mortality and morbidity. We presented a middle-aged male patient who was diagnosed with post-COVID ANCA-associated vasculitis.

Renal vein thrombosis (RVT) is the presence of thrombi in major renal veins or their branches and is a rare clinical entity. RVT is one of the common thrombotic complications of nephrotic syndrome or renal cell carcinoma. Hormonal contraception can also rarely cause this complication. Herein, we presented a case of renal vein thrombosis accompanied by subnephrotic proteinuria after oral contraception.

Psoriasis is a chronic, recurrent, inflammatory and common skin disease of unknown aetiology. Amyloidosis is defined as a heterogeneous group of diseases in which generally soluble plasma proteins accumulate in the extracellular space as insoluble abnormal fibrils. Type AA amyloidosis is a late and severe complication of chronic inflammatory disorders and some chronic infections. Although psoriasis is a common inflammatory skin disease, the development of amyloidosis is rare. Herein, we presented a case of psoriasis who developed AA-type amyloidosis.