Background: Most eye disorders are not fatal but may deteriorate the quality of life of a patient. The eye disorder that is most frequently reported in the cancer chemotherapy is associated with the combination of tegafur/gimeracil/potassium oxonate (S-1). However, preventive methods or treatment methods for the eye disorder have not yet been established. This study aimed to determine changes in tear volume and subjective ocular symptoms during the treatment period in patients receiving S-1 monotherapy for early detection of adverse effects in the eye and establishment of its treatment methods.
Methods: This study included eleven patients receiving S-1 monotherapy as a postoperative adjuvant chemotherapy for gastric cancer. Six subjective ocular symptoms including watering eyes were evaluated and changes in tear volume measured by the Schirmer's test in patients receiving S-1 during the treatment period. In the present study, the patients were divided into "no watering eyes" (patients not experienced watering eyes) group and "watering eyes" (patients experienced watering eyes even once) group.
Results: Six out of eleven patients developed watering eyes after receiving S-1 monotherapy. Among these, the earliest onset occurred on the 2nd week after oral administration. Watering eyes and eye discharge were highly related in patients having a trouble in daily life due to the decreased QOL. Changes in tear volume in the "watering eyes" group significantly increased compared to the "no watering eyes" group during the treatment period, especially when the patients had no subjective symptom of the increased tear volume.
Conclusions: It is essential to prevent eye disorders including watering eyes as an adverse effect of S-1 administration. The present study recommends that the tear volume should be periodically measured using Schirmer's test, and the patient should be interviewed regarding the subjective ocular symptoms for the early detection of watering eyes caused by S-1 administration. If the tear volume can not be measured periodically, medical staffs should pay attention to the patient with eye discharge.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5803866 | PMC |
| http://dx.doi.org/10.1186/s40780-018-0100-8 | DOI Listing |
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