Cases
44-year-old woman with left-sided breast mass   

Additional images

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Beta-catenin

CD34

Desmin

Pancytokeratin

Which clinical feature is seen in patients with this condition?
Distant metastases
Local recurrence
Poor response to chemotherapy
Skin involvement

Fibromatosis in the breast is not usually part of systemic fibromatosis syndromes.
True
False

What is the molecular alteration seen in this condition?
APC or CTNNB1 mutation
CDH1 mutation
MYH-USP6 rearrangement
FOXO1 deletion