What is secondary membraneous nephropathy?

Occurs in many conditions, including the following : ➢ Infections (chronic hepatitis B, syphilis, schistosomiasis, malaria) ➢ Malignant neoplasms, particularly carcinoma of the lung and colon and melanoma (paraneoplastic syndrome) ➢ Autoimmune diseases, particularly systemic lupus erythematosus ➢ Exposure to inorganic salts (gold, mercury) ➢ Drugs (penicillamine, captopril, nonsteroidal anti-inflammatory agents)