title: Immunohistochemical expression of p27(kip1) in metastatic laryngeal squamous cell carcinoma.
abstract: OBJECTIVE
  Laryngeal squamous cell carcinoma (LSCC) is an interesting diagnostic and therapeutic issue. The diagnostic delay is mainly a consequence of the lack of evident symptoms in the early stage of the disease. The purpose of current studies was the evaluation of the expression of p27(kip1) in primary and metastatic LSCC in correlation with patients' clinicopathological data.
  
  
  METHODS
  The indirect immunohistochemical studies were performed on the series of 60 sections (primary tumor: 20 cases of N(0) and 20 cases of N(+), and nodal meta: 20 cases), using primary antibody against p27(kip1) [clone 1B4]. The expression of analyzed protein was performed using automated morphometric methods.
  
  
  RESULTS
  The p27(kip1) nuclear expression was found in 100% (40/40) cases of primary tumor, and in 85% (17/20) cases of SCC meta at lymph nodes. In primary LSCC N(0) the expression of p27(kip1) was significantly higher compared to N(+) cases (p=0.036672). However, the p27(kip1) expression in SCC metastases was higher compared to the primary SCC. Moreover, the analyses based on the classification trees revealed the cutoff p27(kip1) expression in primary LSCC (IRS ≤ 76) which was characteristic for N(+) patients. Consequently, our analysis revealed that high expression of p27(kip1) (IRS>76) was characteristic for N(0) patients.
  
  
  CONCLUSIONS
  Our results suggest that p27(kip1) might be useful prognostic factor of metastatic potential in laryngeal squamous cell carcinoma.
authors.affiliation: Department of Clinical Pathomorphology, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Torun, Bydgoszcz, Poland.
authors.forename: Magdalena
authors.initials: M
authors.lastname: Bodnar
authors.affiliation: Department of Clinical Pathomorphology, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Torun, Bydgoszcz, Poland.
authors.forename: Łukasz
authors.initials: Ł
authors.lastname: Szylberg
authors.affiliation: Department of Otolaryngology and Clinical Oncology Chair and Clinic of Otolaryngology and Department of Pathophysiology of Hearing and Balance System Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Torun, Bydgoszcz, Poland.
authors.forename: Wojciech
authors.initials: W
authors.lastname: Kaźmierczak
authors.affiliation: Department of Clinical Pathomorphology, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Torun, Bydgoszcz, Poland; Department of Oncologic Pathology, Poznan University of Medical Sciences and Greater Poland Oncology Center, Poznan, Poland. Electronic address: amars@cm.umk.pl.
authors.forename: Andrzej
authors.initials: A
authors.lastname: Marszałek
mesh_terms: D000328:Adult; D000368:Aged; D014408:Biomarkers, Tumor / Q000378:metabolism*; D002294:Carcinoma, Squamous Cell / Q000378:metabolism* / Q000473:pathology / Q000556:secondary; D050760:Cyclin-Dependent Kinase Inhibitor p27 / Q000378:metabolism*; D015536:Down-Regulation; D005260:Female; D006258:Head and Neck Neoplasms / Q000378:metabolism / Q000473:pathology; D006801:Humans; D007822:Laryngeal Neoplasms / Q000378:metabolism* / Q000473:pathology; D007830:Larynx / Q000378:metabolism* / Q000473:pathology; D008198:Lymph Nodes / Q000378:metabolism* / Q000473:pathology; D008207:Lymphatic Metastasis; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D000077195:Squamous Cell Carcinoma of Head and Neck
chemical_list: D014408:Biomarkers, Tumor; C436291:CDKN1B protein, human; D050760:Cyclin-Dependent Kinase Inhibitor p27
keywords: Immunohistochemistry; Laryngeal squamous cell carcinoma; Metastases; Morphometric methods; p27(kip1)