Abstract:
AIMS:Adenoid cystic carcinoma (AdCC) of the salivary glands shows heterogeneous behaviour, with metastasis as a key indicator of poor prognosis. Metallothionein (MT) expression has been associated with poor prognosis of diverse neoplasms. We evaluated prognostic factors for AdCC and the role played by MT, focusing on metastatic behaviour. METHODS AND RESULTS:We reviewed the files of the Brazilian National Institute of Cancer between 1997 and 2004, obtaining 49 cases. Fourteen tumours had metastasized during follow-up. Among these, we identified cases presenting with metastasis at patient admission as showing the poorest survival rates. MT immunostaining of the tumours was performed (using the E9 antibody), and evaluated for the parameters of proportion, intensity and distribution in tumour cells. Extent and intensity of staining, and Quickscore (a combined measure of extent and intensity), were higher in metastatic than non-metastatic tumours (for Quickscore, P = 0.044), with highest values found for cases of early metastasis. Most cases showing weak staining, and all with a predominantly cytoplasm-restricted staining pattern, were non-metastatic. Metastatic tumours of solid type received higher scores than solid non-metastatic (Intensity, P = 0.0239; Quickscore, P = 0.0481). CONCLUSIONS:Our results demonstrated metastasis to be the most significant indicator of poor prognosis and deterioration for AdCC. Consistent patterns of MT expression were observed to correlate with metastatic behaviour, indicating that MT may potentially serve as a prognostic marker for AdCC.
journal_name
Histopathologyjournal_title
Histopathologyauthors
Brazão-Silva MT,Cardoso SV,de Faria PR,Dias FL,Lima RA,Eisenberg AL,Nascimento MF,Loyola AMdoi
10.1111/his.12227subject
Has Abstractpub_date
2013-12-01 00:00:00pages
802-9issue
6eissn
0309-0167issn
1365-2559journal_volume
63pub_type
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