diff --git a/IRaCIS.Core.Application/Service/ReadingCalculate/LuganoCalculateService.cs b/IRaCIS.Core.Application/Service/ReadingCalculate/LuganoCalculateService.cs
index d52a4df1b..252c616a9 100644
--- a/IRaCIS.Core.Application/Service/ReadingCalculate/LuganoCalculateService.cs
+++ b/IRaCIS.Core.Application/Service/ReadingCalculate/LuganoCalculateService.cs
@@ -1734,6 +1734,10 @@ namespace IRaCIS.Core.Application.Service.ReadingCalculate
                 }
             
             }
+            if (spleenLength == 0)
+            {
+                return SpleenAssessment.NotEvaluable.GetEnumInt();
+            }
 
             #region 最低
             var visitTaskIds = await _visitTaskRepository.Where(x => x.ReadingCategory == ReadingCategory.Visit &&