title: Head and neck squamous cell carcinoma: measurement of plasma parathyroid hormone-related protein and serum and urine calcium concentrations.
abstract: OBJECTIVE
  Parathyroid hormone-related protein (PTHrP) is expressed by squamous cell carcinomas. Our first objective was to examine the stability of PTHrP in normal human plasma. Our second objective was to determine whether plasma PTHrP could be used in patients with head and neck squamous cell carcinoma (HNSCC) as an indicator of tumor burden or relapse.
  
  
  METHODS
  Blood and urine samples from 55 HNSCC patients undergoing tumor resection at The Ohio State University were measured for plasma PTHrP (1-86) concentration, serum ionized calcium concentration, and urine calcium/creatinine ratio.
  
  
  RESULTS
  Two of 55 HNSCC patients had detectable levels of plasma PTHrP. Serum ionized calcium concentrations and urinary calcium/creatinine ratios were within normal limits in all patients.
  
  
  CONCLUSIONS
  Plasma PTHrP was not a valuable indicator of tumor presence or recurrence in our patient population.
  
  
  CONCLUSIONS
  Plasma PTHrP is not a useful marker of tumor presence or recurrence in patients with stage II to IV or recurrent HNSCC.
authors.affiliation: Department of Veterinary Biosciences, Ohio State University, Columbus, OH 43210-1093, USA.
authors.forename: R S
authors.initials: RS
authors.lastname: Sellers
authors.forename: D E
authors.initials: DE
authors.lastname: Schuller
authors.forename: P K
authors.initials: PK
authors.lastname: Sharma
authors.forename: S H
authors.initials: SH
authors.lastname: Tannehill-Gregg
authors.forename: C C
authors.initials: CC
authors.lastname: Capen
authors.forename: T J
authors.initials: TJ
authors.lastname: Rosol
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D014408:Biomarkers, Tumor / Q000097:blood*; D002118:Calcium / Q000097:blood* / Q000652:urine*; D002294:Carcinoma, Squamous Cell / Q000097:blood*; D005260:Female; D006258:Head and Neck Neoplasms / Q000097:blood*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009363:Neoplasm Proteins / Q000097:blood*; D044162:Parathyroid Hormone-Related Protein; D011506:Proteins / Q000032:analysis*; D011994:Recombinant Proteins / Q000097:blood
chemical_list: D014408:Biomarkers, Tumor; D009363:Neoplasm Proteins; C470121:PTHLH protein, human; D044162:Parathyroid Hormone-Related Protein; D011506:Proteins; D011994:Recombinant Proteins; D002118:Calcium