Table II.

Fibroblastic/myofibroblastic tumours.

Benign

Nodular fasciitis

Proliferative fasciitis and proliferative myositis

Myositis ossificans and fibro-osseous pseudotumor of digits

Ischaemic fasciitis

Elastofibroma

Fibrous hamartoma of infancy

Fibromatosis colli

Juvenile hyaline fibromatosis

Inclusion body fibromatosis

Fibroma of tendon sheath

Desmoplastic fibroblastoma

Myofibroblastoma

Mammary-type myofibroblastoma

Calcifying aponeurotic fibroma

EWSR1-SMAD3-positive fibroblastic tumour (emerging)

Angiomyofibroblastoma

Cellular angiofibroma

Angiofibroma NOS

Nuchal fibroma

Acral fibromyxoma

Gardner fibroma

Intermediate (locally aggressive)

Palmar/plantar-type fibromatosis

Desmoid-type fibromatosis

Lipofibromatosis

Giant cell fibroblastoma

Dermatofibrosarcoma protuberans

Intermediate (rarely metastasising)

Dermatofibrosarcoma protuberans, fibrosarcomatous

Solitary fibrous tumour

Inflammatory myofibroblastic tumour

Low-grade myofibroblastic sarcoma

Superficial CD34-positive fibroblastic tumour

Myxoinflammatory fibroblastic sarcoma

Infantile fibrosarcoma

Malignant

Solitary fibrous tumour, malignant

Fibrosarcoma NOS

Myxofibrosarcoma

Low grade fibromyxoid sarcoma

Sclerosing epithelioid fibrosarcoma