<unk>  can be divided into idiopathic<unk>  (also known as granular lobular mastitis) and<unk>  occurring as a rare secondary complication of a great variety of other conditions such as tuberculosis and other infections, sarcoidosis and<unk> is with polyangiitis. Special forms of<unk>  occur as complication of diabetes. Some cases are due to silicone injection (Silicone-induced<unk>  inflammation) or other foreign body reactions. Idiopathic<unk>  (IGM) is defined as<unk>  without any other attributable cause such as those above mentioned. It occurs on average two years and almost exclusively up to six years after pregnancy, usual age range is 17 to 42 years. Some cases have been reported that were related to drug induced hyperprolactinemia. Exceptionally rarely it has been diagnosed during pregnancy and in men. Primary presentation of any of these conditions as mastitis is very rare and in many cases probably predisposed by other breast or systemic conditions. Although<unk>  is easily confused with cancer it is a completely benign (non-cancerous) condition. Treatment is radically different for idiopathic<unk>  and other<unk>  lesions of the breast, so the precise diagnosis is therefore very important.
Granulomatous mastitis
Nonpuerperal mastitis
Trichoadenoma
Mastitis
Adenomyoma
Invasive hydatidiform mole
Adenomyomatosis
Leiomyosarcoma