In medicine (anatomical pathology), a<unk>  is a<unk> oup of epithelioid macrophages surrounded by a lymphocyte cuff.<unk> s are small nodules that are seen in a variety of diseases such as Crohn's disease, tuberculosis, Leprosy, sarcoidosis, berylliosis and syphilis. It is also a feature of Wegener's<unk> tosis and Churg-Strauss syndrome, two related autoimmune disorders.
An important aspect of<unk> s is whether they are caseating or not. Caseation (literally: turning to cheese) is a form of necrosis at the centre of a<unk>  and is a feature of the<unk> s of tuberculosis.
Granuloma
Pseudopolyp
Xanthoma
Angiomatosis
Calculus 
Corns & calluses
Nevus
Bauxite fibrosis