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Volume 15, Number 4, 2010

Prognostic and predictive significance of p53, EGFr, Ki-67 in larynx preservation treatment

Krzysztof Małecki,   Bogdan Gliński, Anna Mucha-Małecka,  Janusz Ryś, Anna Kruczak,  Krzysztof Roszkowski, Marta Urbańska-Gąsiorowska,  Marcin Hetnał


Background: The optimal management of advanced laryngeal and hypopharyngeal cancers
(L&HC) must involve consideration of both survival and functional effect of the given treatment
approach. Despite over two decades of investigations of several treatment options, including surgery, radiotherapy, chemotherapy or some combinations thereof, little consensus exists as to which treatment offers the best survival, together with functional speech and swallowing
Aim: To determine predictive and prognostic value of p53, EGFr, Ki-67 in patients with advanced laryngeal and hypopharyngeal cancer, treated with larynx preservation intent.
Materials and Methods: Thirty three patients received 2-3 cycles of induction chemotherapy (ICHT) consisting of cisplatin and fluoruracil and underwent subsequent radical radiotherapy.
Immunohistochemical analyzes of p53, EGFr and Ki-67 were performed.
Results: Response to ICHT was obtained in 24 patients (75%). Better response to ICHT was correlated only with EGFr expression (p=0.04, RR=1.91). The 5-year loco-regional control (LRC) and diseasespecific survival (DSS) rates were 48% and 57%, respectively. The 5-year larynx preservation rate was 68% in responders to ICHT compared to 21% in non-responders (p=0.02). It was also higher in patients without EGFr expression (but not significantly, p=0.43).
Conclusion: Lack of EGFr expression is a favorable predictive factor for response to ICHT. Neither p53 nor Ki-67 have predictive and prognostic value in larynx preservation treatment.

Signature: Rep Pract Oncol Radiother, 2010; 15(4) : 87-92

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