diff --git a/atlas/forms.py b/atlas/forms.py
index 14c11a58..d18d1161 100755
--- a/atlas/forms.py
+++ b/atlas/forms.py
@@ -24,6 +24,7 @@ from atlas.models import (
     Case,
     CaseCollection,
     CaseDetail,
+    CasePrior,
     CidReportAnswer,
     Differential,
     Finding,
@@ -858,10 +859,19 @@ class QuestionSchemaForm(ModelForm):
             "schema": SvelteJSONEditorWidgetOverride(),
         }
 
+#class ModelPriorCaseForm(ModelForm):
+#    class Meta:
+#        model = CasePrior
+#        fields = ["case_detail", "prior_case", "relation_text", "prior_visibility"]
+
 class PriorCaseForm(Form):
 
     relation = CharField(max_length=255, required=True)
 
+    prior_visibility = CharField(max_length=2, required=True)
+
+    
+
     #def __init__(self, *args, **kwargs):
     #    self.case_detail = kwargs.pop(
     #        "case_detail"
diff --git a/atlas/migrations/0069_caseprior_prior_visibility.py b/atlas/migrations/0069_caseprior_prior_visibility.py
new file mode 100644
index 00000000..cbb01e4b
--- /dev/null
+++ b/atlas/migrations/0069_caseprior_prior_visibility.py
@@ -0,0 +1,18 @@
+# Generated by Django 5.1.4 on 2025-04-28 15:04
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('atlas', '0068_alter_seriesfinding_description'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='caseprior',
+            name='prior_visibility',
+            field=models.CharField(choices=[('NO', 'None'), ('AL', 'Always'), ('RE', 'Review')], default='AL', help_text='Defines when the prior case is shown to the user', max_length=2),
+        ),
+    ]
diff --git a/atlas/models.py b/atlas/models.py
index 99b9b8bd..d5b354ef 100644
--- a/atlas/models.py
+++ b/atlas/models.py
@@ -1118,6 +1118,19 @@ class CasePrior(models.Model):
 
     relation_text = models.CharField(max_length=255, blank=True, help_text="Text to describe the relationship between the cases")
 
+    class PriorVisibility(models.TextChoices):
+        NONE = "NO", _("None")
+        ALWAYS = "AL", _("Always")
+        REVIEW = "RE", _("Review")
+
+
+    prior_visibility = models.CharField(
+        max_length=2,
+        choices=PriorVisibility.choices,
+        default=PriorVisibility.ALWAYS,
+        help_text="Defines when the prior case is shown to the user",
+    )
+
     class Meta:
         unique_together = ("case_detail", "prior_case")
 
diff --git a/atlas/templates/atlas/case_display_block.html b/atlas/templates/atlas/case_display_block.html
index 0077c8c8..44583711 100755
--- a/atlas/templates/atlas/case_display_block.html
+++ b/atlas/templates/atlas/case_display_block.html
@@ -253,7 +253,7 @@
         <button
             hx-get="{% url 'atlas:case_collection_form' case.pk %}"
             hx-target="#collection-form">
-            Add collection</button>
+            Add to collection</button>
         {% endif %}
         <div id="collection-form"></div>
         <ul>
diff --git a/atlas/templates/atlas/collection_case_priors.html b/atlas/templates/atlas/collection_case_priors.html
index 597301b4..9b00823b 100644
--- a/atlas/templates/atlas/collection_case_priors.html
+++ b/atlas/templates/atlas/collection_case_priors.html
@@ -24,7 +24,7 @@
     <h3>Available priors</h3>
 
     <ul>
-        {% for case, added, relation in available_priors %}
+        {% for case, added, relation, visibility in available_priors %}
 
             <li class='
                        {% if added %}
@@ -38,24 +38,63 @@
 
                 <br/>
 
-
                 {% if not added %}
                     <form hx-post="{% url 'atlas:collection_case_priors' collection.id case_detail.case.pk %}"
                           hx-target="#htmx-response-{{case.id}}"
-                            _="on htmx:afterRequest log 'test' then remove me"
-                          >
+                          _="on htmx:afterRequest log 'test' then remove me">
                         {% csrf_token %}
                         <input type="hidden" name="prior_case_id" value="{{case.id}}" />
                         <input type="text" name="relation" value="{{relation}}" placeholder="relation to case" />
+                        <br />
+                        <label for="prior_visibility_{{case.id}}">Visibility:</label>
+                        <select name="prior_visibility" id="prior_visibility_{{case.id}}">
+                            <option value="AL" 
+                            {% if visibility == 'AL' %}
+                               selected 
+                            {% endif %}
+                                >Always</option>
+                            <option value="RE"
+                            {% if visibility == 'RE' %}
+                               selected 
+                            {% endif %}
+
+                            >Review</option>
+                            <option value="NO"
+                            {% if visibility == 'NO' %}
+                               selected 
+                            {% endif %}
+                            >None</option>
+                        </select>
+                        <br />
                         <button class="btn primary">Add to case</button>
                     </form>
                 {% else %}
                     <form hx-post="{% url 'atlas:collection_case_priors' collection.id case_detail.case.pk %}"
                           hx-target="#htmx-response-{{case.id}}"
-                            _="on htmx:afterRequest log 'test' then remove me"
-                          >
+                          _="on htmx:afterRequest log 'test' then remove me">
                         Case available: {{relation}}
                         <input type="hidden" name="remove" value="{{case.id}}" />
+                        <br />
+                        <label for="prior_visibility_{{case.id}}">Visibility:</label>
+                        <select name="prior_visibility" id="prior_visibility_{{case.id}}" disabled>
+                            <option value="AL" 
+                            {% if visibility == 'AL' %}
+                               selected 
+                            {% endif %}
+                                >Always</option>
+                            <option value="RE"
+                            {% if visibility == 'RE' %}
+                               selected 
+                            {% endif %}
+
+                            >Review</option>
+                            <option value="NO"
+                            {% if visibility == 'NO' %}
+                               selected 
+                            {% endif %}
+                            >None</option>
+                        </select>
+                        <br />
                         <button class="btn primary">Remove from case</button>
                     </form>
                 {% endif %}
diff --git a/atlas/templates/atlas/collection_case_view_take.html b/atlas/templates/atlas/collection_case_view_take.html
index 934ccbed..694f9da8 100644
--- a/atlas/templates/atlas/collection_case_view_take.html
+++ b/atlas/templates/atlas/collection_case_view_take.html
@@ -49,14 +49,24 @@
 
     {% if collection.show_ohif_viewer %}
         <div>
+            
+            {% if question_completed %}
+            <iframe id="viewer" style="width: 100%; height: 100%; border: none; padding: 0px; min-height: 700px" src="/ohif/viewer/dicomjson?url=https://www.penracourses.org.uk{% url 'atlas:collection_case_dicom_json_review' collection.pk case.pk %}"></iframe>
+            {% else %}
             <iframe id="viewer" style="width: 100%; height: 100%; border: none; padding: 0px; min-height: 700px" src="/ohif/viewer/dicomjson?url=https://www.penracourses.org.uk{% url 'atlas:collection_case_dicom_json' collection.pk case.pk %}"></iframe>
+            {% endif %}
+                
         </div>
     {% endif %}
 
 
     {% if collection.show_ohif_viewer_link %}
         <div>
+            {% if question_completed %}
+            <a target="_blank" href="/ohif/viewer/dicomjson?url=https://www.penracourses.org.uk{% url 'atlas:collection_case_dicom_json_review' collection.pk case.pk %}" title="Click to open the case in the advanced viewer. This will open in a new tab/window."><button class="viewer"><i class="bi bi-collection"></i> Launch advanced viewer.</button></a>
+            {% else %}
             <a target="_blank" href="/ohif/viewer/dicomjson?url=https://www.penracourses.org.uk{% url 'atlas:collection_case_dicom_json' collection.pk case.pk %}" title="Click to open the case in the advanced viewer. This will open in a new tab/window."><button class="viewer"><i class="bi bi-collection"></i> Launch advanced viewer.</button></a>
+            {% endif %}
         </div>
     {% endif %}
 
diff --git a/atlas/urls.py b/atlas/urls.py
index 43ac7064..3b91f470 100755
--- a/atlas/urls.py
+++ b/atlas/urls.py
@@ -138,6 +138,11 @@ urlpatterns = [
         views.collection_case_dicom_json,
         name="collection_case_dicom_json",
     ),
+    path(
+        "collection/<int:exam_id>/case/<int:case_id>/dicom_json/review",
+        views.collection_case_dicom_json_review,
+        name="collection_case_dicom_json_review",
+    ),
     path(
         "collection/<int:exam_id>/question_schemas",
         views.collection_question_schemas,
diff --git a/atlas/views.py b/atlas/views.py
index d1285365..34bf8554 100755
--- a/atlas/views.py
+++ b/atlas/views.py
@@ -56,6 +56,7 @@ from .forms import (
     ExamGroupsForm,
     FindingForm,
     JsonAnswerForm,
+    #ModelPriorCaseForm,
     PriorCaseForm,
     QuestionSchemaForm,
     ResourceForm,
@@ -493,7 +494,7 @@ def add_case_to_collection(request, collection_id):
             return HttpResponse("Case already in collection")
         print(case)
         collection.add_case(case)
-        return HttpResponse("Case added to collection (refresh to see)")
+        return HttpResponse(f"Case added to collection {collection.name} (refresh to see)")
 
     # if request.method == "POST":
 
@@ -1766,6 +1767,7 @@ def collection_case_priors(request, exam_id, case_id):
                 return HttpResponse(
                     "You need to enter text to describe the relationship between the cases"
                 )
+            p.prior_visibility = request.POST["prior_visibility"]
 
             p.save()
 
@@ -1780,7 +1782,7 @@ def collection_case_priors(request, exam_id, case_id):
 
     added_relation_map = {}
     for prior in added_priors:
-        added_relation_map[prior.prior_case] = prior.relation_text
+        added_relation_map[prior.prior_case] = (prior.relation_text, prior.prior_visibility)
 
     case = case_detail.case
 
@@ -1789,9 +1791,9 @@ def collection_case_priors(request, exam_id, case_id):
     available_priors = []
     for case in available_cases:
         if case in added_relation_map:
-            available_priors.append((case, True, added_relation_map[case]))
+            available_priors.append((case, True, added_relation_map[case][0], added_relation_map[case][1]))
         else:
-            available_priors.append((case, False, ""))
+            available_priors.append((case, False, "", "AL"))
 
     form = PriorCaseForm()
 
@@ -1808,6 +1810,7 @@ def collection_case_priors(request, exam_id, case_id):
         {
             "case_detail": case_detail,
             "form": form,
+            #"model_form": model_form,
             # "example_form": example_form,
             "collection": collection,
             "case": case_detail.case,
@@ -2302,17 +2305,6 @@ def collection_case_view_take(
 
     series_list = case.series.all().prefetch_related("images", "examination", "plane")
 
-    prior_cases = case_detail.caseprior_set.all()
-
-    series_to_load = []
-
-    for series in series_list:
-        series_to_load.append((series, False, ""))
-
-    for prior in prior_cases:
-        for series in prior.prior_case.get_series():
-            series_to_load.append((series, True, prior.relation_text))
-
     previous = case_number > 0
     next = case_number < (case_count - 1)
 
@@ -2348,6 +2340,25 @@ def collection_case_view_take(
 
         resources = case.caseresource_set.filter(pre_review=True)
 
+    prior_cases = case_detail.caseprior_set.all()
+
+    series_to_load = []
+
+    for series in series_list:
+        series_to_load.append((series, False, ""))
+
+    for prior in prior_cases:
+        match prior.prior_visibility:
+            case "AL":
+                for series in prior.prior_case.get_series():
+                    series_to_load.append((series, True, prior.relation_text))
+            case "RE":
+                if question_completed:
+                    for series in prior.prior_case.get_series():
+                        series_to_load.append((series, True, prior.relation_text))
+            case _:
+                continue
+
     return render(
         request,
         "atlas/collection_case_view_take.html",
@@ -2437,11 +2448,16 @@ def use_dates_as_descriptions(request, pk):
 
     return HttpResponse("Done")
 
+def collection_case_dicom_json_review(request, exam_id, case_id):
+    return collection_case_dicom_json(request, exam_id, case_id, review=True)
 
-def collection_case_dicom_json(request, exam_id, case_id):
+def collection_case_dicom_json(request, exam_id, case_id, review=False):
     case_detail = CaseDetail.objects.get(case=case_id, collection=exam_id)
 
-    priors = case_detail.caseprior_set.all()
+    if review:
+        priors = case_detail.caseprior_set.exclude(prior_visibility="NO")
+    else:
+        priors = case_detail.caseprior_set.exclude(prior_visibility__in=["NO", "RE"])
 
     return JsonResponse(case_detail.case.get_case_dicom_json(priors=priors))