title: Mitotically active plexiform fibrohistiocytic tumor.
abstract: Plexiform fibrohistiocytic tumor is an intermediate malignant tumor situated in superficial soft tissues. It affects children and young adults. The tumor is most commonly located on upper extremities, whereas involvement of back region is rare. Mitotic activity is generally low (~3/10 HPF). It is rare, but it can exhibit aggressive behavior, so total excision with clear surgical margins and long-term followup is necessary to detect local recurrence and metastases. We report a child with a solid mass on back region which was found to be a mitotically active plexiform fibrohistiocytic tumor (6/10 HPF) after excision. Plexiform fibrohistiocytic tumor (PFT) is a mesenchymal neoplasm of children, adolescents, and young adults. It is characterized by fibrohistiocytic cytomorphology and multinodular growth pattern. Clinically it is usually a slow-growing mass of upper extremities with frequent local recurrence and rare regional lymphatic and systemic metastasis (Fletcher et al. (2002), Enzinger and Zhang (1988), Remstein et al. (1999)).
authors.affiliation: Department of Pathology, Istanbul Medeniyet University Goztepe Training and Research Hospital, Turkey.
authors.forename: Ebru
authors.initials: E
authors.lastname: Zemheri
authors.forename: Seyma
authors.initials: S
authors.lastname: Ozkanlı
authors.forename: Serkan
authors.initials: S
authors.lastname: Senol
authors.forename: Filiz
authors.initials: F
authors.lastname: Ozen
authors.forename: Cigdem
authors.initials: C
authors.lastname: Ulukaya Durakbaşa
authors.forename: Ilkin
authors.initials: I
authors.lastname: Zindancı
authors.forename: Hamit
authors.initials: H
authors.lastname: Okur