According to the WHO classification, three lesional patterns can be observed *<unk>  myofibroblastic tumour, that can be associated with an ALK gene rearrangement * Plasmocytic pattern ("plasma cell granuloma"), that can be linked to IgG4-related disease * Fibrous and hyalinizing pattern: Pulmonary hyalinizing granuloma
Inflammatory pseudotumor
Bone cyst
Pyogenic granuloma
Eosinophilic granuloma
Nodular fasciitis
Solitary fibrous tumor
Adenomatoid tumor
Juvenile active ossifying fibroma