diff --git a/IRaCIS.Core.Application/Service/ReadingCalculate/LuganoCalculateService.cs b/IRaCIS.Core.Application/Service/ReadingCalculate/LuganoCalculateService.cs
index 9008dd605..60a69116a 100644
--- a/IRaCIS.Core.Application/Service/ReadingCalculate/LuganoCalculateService.cs
+++ b/IRaCIS.Core.Application/Service/ReadingCalculate/LuganoCalculateService.cs
@@ -2106,7 +2106,7 @@ namespace IRaCIS.Core.Application.Service.ReadingCalculate
             var taskinfo = await _visitTaskRepository.Where(x => x.Id == visitTaskId).FirstNotNullAsync();
             ReadingCalculateDto inDto = await _generalCalculateService.GetReadingCalculateDto(visitTaskId);
 
-            if (spleenLength == 0)
+            if (spleenLength < 0)
             {
                 return SpleenAssessment.NotEvaluable.GetEnumInt();
             }