title: Clinical and pathological characteristics of giant cell angioblastoma: a case report.
abstract: Giant cell angioblastoma (GCAB) is an extremely rare soft tissue tumor of early childhood and only five cases have been described to date. As such the clinical, pathological, and prognostic features are poorly defined. We prensent here a new case of GCAB in bone of a child aged 4-years old. The lesion was composed of dense and loose cell regions. The dense regions were characterized by nodular, linear, and plexiform aggregates of oval- to spindle-shaped tumor cells around small vascular channels and interspersed with large mononuclear cells and multinucleate giant cells. The loose cell areas were characterized by distributed fibroblasts and abundant myxoid matrix, which diminished with patient age. Infiltrative growth was observed in some areas. Oval-to-spindle cells showed positivity for Vimentin, CD31 and CD34 staining, and partial positivity for smooth muscle actin. Mononuclear cells and multinucleate giant cells showed Vimentin and CD68 positivity. Seventeen months after thorough curettage of the lesion, a local recurrence was found. Based upon the clinical, histological and immunohistochemical findings, infiltrate condition, and prognosis, we classified GCAB into two subtypes. Type I does not infiltrate surrounding tissues and has good prognosis. Type II infiltrates the surrounding tissues, relapses earlier, and has worse prognosis. This report augments the limited GCAB literature to promote our understanding and guide therapy of this rare disease.
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authors.affiliation: Department of Pathology, Foshan Hospital of Traditional Chinese Medicine, Guangzhou University of Chinese Medicine, Foshan, People’s Republic of China.
authors.forename: Rong-Jun
authors.initials: RJ
authors.lastname: Mao
authors.forename: Zhi-Ming
authors.initials: ZM
authors.lastname: Jiang
authors.forename: Hui-Zhen
authors.initials: HZ
authors.lastname: Zhang
authors.forename: Xiong-Zeng
authors.initials: XZ
authors.lastname: Zhu
authors.forename: Qing-Ling
authors.initials: QL
authors.lastname: Zhang
mesh_terms: D014408:Biomarkers, Tumor / Q000032:analysis; D002675:Child, Preschool; D003475:Curettage; D003937:Diagnosis, Differential; D005266:Femoral Neoplasms / Q000737:chemistry / Q000473:pathology* / Q000601:surgery; D018212:Giant Cell Tumor of Bone / Q000737:chemistry / Q000473:pathology* / Q000601:surgery; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D009361:Neoplasm Invasiveness; D009364:Neoplasm Recurrence, Local; D011237:Predictive Value of Tests; D013997:Time Factors; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome
chemical_list: D014408:Biomarkers, Tumor