diff --git a/atlas/admin.py b/atlas/admin.py
index 80b49959..768248a6 100755
--- a/atlas/admin.py
+++ b/atlas/admin.py
@@ -9,6 +9,7 @@ from .models import (
     Finding,
     SeriesFinding,
     Structure,
+    PathalogicalProcess,
 )
 
 import tagulous.admin
@@ -33,6 +34,7 @@ admin.site.register(Finding)
 admin.site.register(Structure)
 admin.site.register(SeriesFinding)
 admin.site.register(Differential)
+admin.site.register(PathalogicalProcess)
 
 
 class DifferentialInline(admin.TabularInline):
diff --git a/atlas/migrations/0016_auto_20211206_2224.py b/atlas/migrations/0016_auto_20211206_2224.py
new file mode 100644
index 00000000..0b6387e0
--- /dev/null
+++ b/atlas/migrations/0016_auto_20211206_2224.py
@@ -0,0 +1,25 @@
+# Generated by Django 3.2.8 on 2021-12-06 22:24
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('atlas', '0015_condition_parent'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='PathalogicalProcess',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.CharField(max_length=255)),
+            ],
+        ),
+        migrations.AddField(
+            model_name='case',
+            name='pathalogical_process',
+            field=models.ManyToManyField(blank=True, to='atlas.PathalogicalProcess'),
+        ),
+    ]
diff --git a/atlas/models.py b/atlas/models.py
index d37cbe60..940b1190 100644
--- a/atlas/models.py
+++ b/atlas/models.py
@@ -140,6 +140,14 @@ class Subspecialty(models.Model):
     def get_absolute_url(self):
         return reverse("atlas:subspecialty_detail", kwargs={"pk": self.pk})
 
+class PathalogicalProcess(models.Model):
+    name = models.CharField(max_length=255)
+
+    def __str__(self) -> str:
+        return self.name
+
+    def get_absolute_url(self):
+        return reverse("atlas:pathalogical_process_detail", kwargs={"pk": self.pk})
 
 class Differential(models.Model):
     condition = models.ForeignKey(Condition, on_delete=models.CASCADE)
@@ -193,6 +201,8 @@ class Case(models.Model):
 
     condition = models.ManyToManyField(Condition, blank=True)
 
+    pathalogical_process = models.ManyToManyField(PathalogicalProcess, blank=True)
+
     differential = models.ManyToManyField(
         Condition, through=Differential, related_name="casedifferential"
     )