Immunohistochemical IMP3 and PCNA Expression as Diagnostic and Prognostic Markers in Laryngeal Squamous Cell Carcinoma in Sohag Governorate

Laryngeal cancer is responsible for 2-5% of all new cancer cases worldwide. Squamous cell carcinoma of the larynx (LSCC) is the most common malignant tumor of the larynx, accounting for 85-90% of all laryngeal malignancies.

Despite significant therapeutic developments in recent decades, increases in patients' 5-year survival rates are still minimal , which is likely due to late-stage diagnosis and other complex factors. Therefore, to improve the outcome, timely diagnosis, selection of the most appropriate therapy, and an adequate follow-up approach is needed.

The insulin-like growth factor II m-RNA-binding protein 3 (IMP3) is a new biomarker that may be implicated in the carcinogenesis of various malignancies, including head and neck squamous cell carcinoma. IMP3 normally expressed in embryonic tissue but decreases after birth and is no longer detectable in adult tissue With the exception of a few tissues. As a result, IMP3 is expressed only in tumors and not in neighboring normal tissues.

Proliferating Cell Nuclear Antigen (PCNA) is a nuclear protein that acts as a cell proliferation marker. In most forms of solid malignancies, such as colorectal cancer and breast cancer, PCNA is closely linked to prognosis and survival.

In this study, hoping to improve diagnosis of LSCC and assess prognosis better by using both IMP3 and PCNA biomarkers. As IMP3 may have a role in cell growth and proliferation and PCNA is a marker of cell proliferation; studying the association between both markers in laryngeal carcinoma is recommended.