Patent ID: 8053202

Claim:
A method for judging stages between an active phase and a non-active phase of interstitial pneumonitis in a patient comprising: setting as a base value a value of a main metabolite of prostaglandin, 7α-hydroxy-5, 11-diketotetranor-prosta-1,16-dioic acid (PGE-MUM) concentration in the urine obtained by measuring PGE-MUM comprised in urine of a patient diagnosed as being in a non-active phase of interstitial pneumonitis being treated with an anti-inflammatory drug; and determining that interstitial pneumonitis is in the active phase when the concentration of PGE-MUM comprised in urine of the patient exceeds the base value and that interstitial pneumonitis is in the non-active phase when the concentration of PGE-MUM comprised in urine of the patient is not more than the base value.