P-31 spectroscopy study of response of superficial human tumors to therapy

Gregory S. Karczmar, Dieter J. Meyerhoff, Michael D. Boska, Bruno Hubesch, Julie Poole, Gerald B. Matson, Frank Valone, Michael W. Weiner

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


Studies were performed to characterize phosphorus-31 magnetic resonance (MR) spectra obtained from 10 superficial human tumors outside the brain and to determine whether P-31 MR spectroscopy could allow detection of a response to therapy before a change in tumor size was measured. The ratio of phosphomonoester to adenosine triphosphate peak intensities (PME/ ATP) was unusually large in all tumors studied. The average PME/ ATP in lymphomas (1.8 ± 0.5) was greater than in nonlymphoma cancers (1.1 ± 0.15). The average PME/ ATP for all tumors studied (1.4 ± 0.5) was much greater than that of underlying skeletal muscle (0.23 ± .09). Eight of the tumors were studied before and after therapy. Responders were distinguished from nonresponders on the basis of changes in tumor size. PME/ATP decreased during therapy in three lymphomas that responded to therapy. In an adenocarcinoma and Ewing sarcoma that did not respond to therapy, PME/ATP increased. PME/ ATP remained constant in two squamous cell carcinomas that responded to therapy and decreased in one squamous cell carcinoma that decreased in size by 40% but was classified as a nonresponder. Changes in PME/ATP did not always parallel changes in tumor size during therapy. In two patients, a decrease in PME/ATP preceded a decrease in tumor size. In four patients, PME/ ATP increased transiently during periods when tumor size remained constant.

Original languageEnglish (US)
Pages (from-to)149-153
Number of pages5
Issue number1
StatePublished - Apr 1991
Externally publishedYes


  • Head and neck neoplasms
  • Lymphoma, MR studies, 99.1214
  • Magnetic resonance (MR), phosphorus studies
  • Magnetic resonance (MR), spectroscopy
  • Magnetic resonance (MR), tissue characterization
  • Magnetic resonance (MR), treatment planning

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging


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