Laryngeal inflammatory myofibroblastic tumors: Different clinical appearance and histomorphologic presentation of one entity.
Head Neck
; 32(11): 1573-8, 2010 Nov.
Article
em En
| MEDLINE
| ID: mdl-19787794
ABSTRACT
BACKGROUND:
Inflammatory myofibroblastic tumors (IMFTs) of the larynx are rare. We report the clinical presentation, histomorphology, and new molecular findings of 2 cases.METHODS:
Paraffin-embedded specimens were stained immunohistochemically (eg, vimentin, AE1/3, Alk-1, smooth muscle [sm-]actin, p53, Rb1, immunoglobulin G4 [IgG4]). Epstein-Barr virus-encoded RNA (EBER) in situ hybridization and HHV8-polymerase chain reaction (PCR) were done. Comparative genomic hybridization (CGH) was performed.RESULTS:
Case 1 was that of a 56-year-old man with an infiltrating plasma-cell-rich tumor (Alk-1-, sm-actin+). Plasma cells were strongly positive for IgG4. CGH was unsuspicious. Case 2 was that of a 34-year-old woman with an exophytic tumor (Alk-1+). CGH revealed losses on 13q14-22. The few plasma cells were negative for IgG4. The proliferation (Ki67) was low in both cases.CONCLUSION:
Different types of IMFTs may exist and could indicate different therapeutic strategies. Alk-1-positive cases with only scattered inflammatory cells could represent the neoplastic variant, whereas cases rich in plasma cells could be associated with IgG4 sclerosing diseases.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Doenças da Laringe
/
Granuloma de Células Plasmáticas
Idioma:
En
Ano de publicação:
2010
Tipo de documento:
Article