"Imaging of inclusion body fibromatosis usually reveals a non-specific soft tissue mass. Appearance on cross-sectional imaging has been described as poorly demarcated, heterogenous round to oval, subcutaneous soft tissue mass with similarities to other superficial fibromatoses. Osseous involvement has been described in rare events 2,4."
"Imaging of inclusion body fibromatosis usually reveals a non-specific soft tissue mass. Appearance on cross-sectional imaging has been described as poorly demarcated, heterogenous round to oval, subcutaneous soft tissue mass with similarities to other superficial fibromatoses. Osseous involvement has been described in rare events 2,4."
"Inclusion body fibromatosis is a rare condition and accounts for about 2% of fibroblastic tumours in children and approximately 0.1% of soft tissue tumours 1. Almost all cases have been described in children younger than 5 years old. About 30% are detected at birth and the majority of cases are seen within the first year of life. There is no gender predilection 1,2."
"cytologically bland, fibroblastic or myofibroblastic, dermal proliferation"
"short fascicular, whorling or storiform growth pattern typically perpendicular to epidermis extending into dermis or subcutis"
"Immunohistochemistry stains can be positive for actin, calponin and occasionally caldesmon 1-3."