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  • Title: Angiomatoid Fibrous Histiocytoma With ALK Expression in an Unusual Location and Age Group.
    Author: De Noon S, Fleming A, Singh M.
    Journal: Am J Dermatopathol; 2020 Sep; 42(9):689-693. PubMed ID: 32310859.
    Abstract:
    Angiomatoid fibrous histiocytoma (AFH) is a relatively rare soft tissue tumor of intermediate malignant potential, occurring most commonly in young adults, with a recognized propensity for local recurrence and occasional metastasis. A case of AFH occurring on the finger of a 60-year-old man is described in which the unusual location and age group for this entity raised the original wrong diagnosis of an aneurysmal and cellular fibrous histiocytoma. Further workup demonstrated an EWSR1-CREB1 translocation, confirming the correct diagnosis of AFH. Strong anaplastic lymphoma kinase (ALK) expression using the antibody clone D5F3 was demonstrated in our case on immunohistochemistry, which is in concordance with recent findings of anaplastic lymphoma kinase positivity with this antibody in the majority of AFHs.
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