title: Sinonasal angiosarcoma with marrow involvement at presentation mimicking malignant lymphoma: cytogenetic analysis using multiple techniques.
abstract: Angiosarcoma of the head and neck most commonly involves the skin of the scalp or face; primary involvement of the sinonasal region is exceedingly rate. We report a patient with sinonasal angiosarcoma who showed marrow involvement at presentation. Marrow aspiration smears showed many large, often segregated blast-like cells, mimicking malignant lymphoma. However, trephine biopsy revealed formation of anastomosing vascular spaces by the tumor cells and immunoreactivity for CD31, supporting a diagnosis of angiosarcoma. DNA ploidy analysis showed an apparent diploidy. Nevertheless, conventional cytogenetics demonstrated very complex chromosomal abnormalities with the presence of multiple hypodiploid clones, together with several near-triploid to near-tetraploid clones showing structural abnormalities involving chromosomes 1, 3, 4, 9, 14, 16, 17, 18, and 22. The identification of these karyotypic changes has been facilitated by the application of comparative genomic hybridization and spectral karyotyping.
authors.affiliation: Department of Pathology, Queen Elizabeth Hospital, 30 Gascoigne Road, Kowloon, SAR, Hong Kong, China. kfwong@ha.org.hk
authors.forename: K F
authors.initials: KF
authors.lastname: Wong
authors.forename: C C
authors.initials: CC
authors.lastname: So
authors.forename: N
authors.initials: N
authors.lastname: Wong
authors.forename: L L
authors.initials: LL
authors.lastname: Siu
authors.forename: Y L
authors.initials: YL
authors.lastname: Kwong
authors.forename: J K
authors.initials: JK
authors.lastname: Chan
mesh_terms: D000328:Adult; D019046:Bone Marrow Neoplasms / Q000235:genetics*; D002869:Chromosome Aberrations; D005260:Female; D016158:Genes, p53; D006394:Hemangiosarcoma / Q000235:genetics*; D006801:Humans; D007621:Karyotyping; D008223:Lymphoma / Q000235:genetics*; D010255:Paranasal Sinus Neoplasms / Q000235:genetics*; D013101:Sphenoid Sinus