@@ -12,8 +12,8 @@ image; the mask's bounded labelmap is allocated only when needed.
   appearance. Stores holding masks or annotation tools declare their segment
   references on the registry, which hands them the removal. Removing the last
   image deletes every segment no config entry holds.
-- `deleteSegment.ts` deletes a segment with its masks and shapes and reports
-  what went with it.
+- `deleteSegment.ts` guards locked segments before deleting their masks and
+  shapes.
 - `store.ts` owns mask identity, attachment, lookup, and lifecycle. Import and
   restore use its operations to create records and attach prepared storage.
 - `masks/` contains allocation, growth, overlap operations, and voxel access.
 
@@ -2,9 +2,9 @@ import { beforeEach, describe, expect, it } from 'vitest';
 import { createPinia, setActivePinia } from 'pinia';
 
 import { createSegmentRegistry } from '@/src/segmentation/segmentRegistry';
-import { deleteSegmentAndReport } from '@/src/segmentation/deleteSegment';
+import { deleteUnlockedSegment } from '@/src/segmentation/deleteSegment';
 
-describe('deleteSegmentAndReport', () => {
+describe('deleteUnlockedSegment', () => {
   beforeEach(() => {
     setActivePinia(createPinia());
   });
@@ -13,7 +13,7 @@ describe('deleteSegmentAndReport', () => {
     const registry = createSegmentRegistry();
     const id = registry.addSegment({ name: 'Tumor', locked: true });
 
-    deleteSegmentAndReport(registry, id);
+    deleteUnlockedSegment(registry, id);
 
     expect(registry.getSegment(id)).toBeDefined();
   });
@@ -22,7 +22,7 @@ describe('deleteSegmentAndReport', () => {
     const registry = createSegmentRegistry();
     const id = registry.addSegment({ name: 'Tumor' });
 
-    deleteSegmentAndReport(registry, id);
+    deleteUnlockedSegment(registry, id);
 
     expect(registry.getSegment(id)).toBeUndefined();
   });
 
@@ -10,7 +10,7 @@ import SaveSegmentationDialog from '@/src/segmentation/components/SaveSegmentati
 import SegmentEditor from '@/src/segmentation/components/SegmentEditor.vue';
 import SegmentListActions from '@/src/segmentation/components/SegmentListActions.vue';
 import { useCurrentImage } from '@/src/composables/useCurrentImage';
-import { deleteSegmentAndReport } from '@/src/segmentation/deleteSegment';
+import { deleteUnlockedSegment } from '@/src/segmentation/deleteSegment';
 import { useSegmentEditing } from '@/src/segmentation/composables/useSegmentEditing';
 import { pulseSegmentMask } from '@/src/segmentation/rendering/revealPulse';
 import {
@@ -408,7 +408,7 @@ const {
                 @reveal="revealSlice(item)"
                 @edit="editing.startEditing(item.id)"
                 @toggle-visible="toggleVisible(item.id)"
-                @delete="deleteSegmentAndReport(registry, item.id)"
+                @delete="deleteUnlockedSegment(registry, item.id)"
               />
             </template>
           </editable-item-list>
 
@@ -1086,7 +1086,7 @@ describe('locked segment editor routes', () => {
   );
 });
 
-describe('deleting a segment says what went with it', () => {
+describe('deleting a segment without a success notification', () => {
   beforeEach(async () => {
     setActivePinia(createPinia());
     await seatSpecImage('img-1');
@@ -1115,31 +1115,40 @@ describe('deleting a segment says what went with it', () => {
     await nextTick();
   };
 
-  it('counts the masks, the images they were on, and the annotations', async () => {
+  const expectDeleted = async (wrapper: VueWrapper) => {
+    for (const imageId of ['img-1', 'img-2']) {
+      await showImage(imageId);
+      expect(rowIds(wrapper)).toEqual([]);
+      expect(
+        wrapper
+          .get('[data-testid="save-segments-button"]')
+          .attributes('disabled')
+      ).toBeDefined();
+    }
+    expect(messageTitles()).toEqual([]);
+  };
+
+  it('removes a segment and its painted masks across images', async () => {
     const segmentId = spreadSegment(['img-1', 'img-2']);
     const wrapper = mountList();
     await nextTick();
 
     await deleteRow(wrapper, segmentId);
 
-    expect(messageTitles()).toEqual([
-      'Deleted 2 masks on 2 images and 2 annotations',
-    ]);
+    await expectDeleted(wrapper);
   });
 
-  it('says one of each in the singular', async () => {
+  it('removes a segment with content only on another image', async () => {
     const segmentId = spreadSegment(['img-2']);
     const wrapper = mountList();
     await nextTick();
 
     await deleteRow(wrapper, segmentId);
 
-    expect(messageTitles()).toEqual([
-      'Deleted 1 mask on 1 image and 1 annotation',
-    ]);
+    await expectDeleted(wrapper);
   });
 
-  it('names only what the segment had', async () => {
+  it('deletes painted and annotation-only segments', async () => {
     const painted = makeMask('img-1', 'Painted');
     seedVoxel(painted.maskId, [1, 1, 0]);
     const shaped = segments().addSegment({ name: 'Shaped' });
@@ -1153,18 +1162,16 @@ describe('deleting a segment says what went with it', () => {
     await nextTick();
 
     await deleteRow(wrapper, painted.segmentId);
+    expect(rowIds(wrapper)).toEqual([shaped]);
     await deleteRow(wrapper, shaped);
 
-    expect(messageTitles()).toEqual([
-      'Deleted 1 mask on 1 image',
-      'Deleted 1 annotation',
-    ]);
+    await expectDeleted(wrapper);
   });
 
   // A record is minted the moment a segment is resolved as an edit target, so
   // an image can hold one for a segment that was never painted there. Deleting
   // drops the record, but there was nothing on that image to lose.
-  it('counts no mask on an image the segment was only resolved on', async () => {
+  it('deletes empty mask records with their segment', async () => {
     const recorded = makeMask('img-1', 'Resolved');
     const allocated = maskOn('img-2', recorded.segmentId);
     store().maskVoxels(allocated.id).materialize();
@@ -1173,8 +1180,7 @@ describe('deleting a segment says what went with it', () => {
 
     await deleteRow(wrapper, recorded.segmentId);
 
-    expect(rowIds(wrapper)).toEqual([]);
-    expect(messageTitles()).toEqual([]);
+    await expectDeleted(wrapper);
   });
 
   it('stays quiet when the segment held nothing', async () => {
@@ -1184,11 +1190,10 @@ describe('deleting a segment says what went with it', () => {
 
     await deleteRow(wrapper, empty);
 
-    expect(rowIds(wrapper)).toEqual([]);
-    expect(messageTitles()).toEqual([]);
+    await expectDeleted(wrapper);
   });
 
-  it('reports the same cascade when the editor deletes', async () => {
+  it('removes the segment and its painted masks when the editor deletes', async () => {
     const segmentId = spreadSegment(['img-1', 'img-2']);
     const wrapper = mountList();
     await nextTick();
@@ -1199,10 +1204,7 @@ describe('deleting a segment says what went with it', () => {
     editor(wrapper).vm.$emit('delete');
     await nextTick();
 
-    expect(rowIds(wrapper)).toEqual([]);
-    expect(messageTitles()).toEqual([
-      'Deleted 2 masks on 2 images and 2 annotations',
-    ]);
+    await expectDeleted(wrapper);
   });
 });
 
 
@@ -4,7 +4,7 @@ import type { SegmentRegistry } from '@/src/segmentation/segmentRegistry';
 import type { Maybe } from '@/src/types';
 import { cssColorToRGBA } from '@/src/segmentation/color';
 import { cleanUndefined } from '@/src/utils';
-import { deleteSegmentAndReport } from '@/src/segmentation/deleteSegment';
+import { deleteUnlockedSegment } from '@/src/segmentation/deleteSegment';
 
 /**
  * The segment edit dialog: one editor, one set of fields, one place that
@@ -86,7 +86,7 @@ export function useSegmentEditing(registry: SegmentRegistry) {
   // Deleting a segment takes its masks on every image and its shapes with it.
   function deleteEditingSegment() {
     const id = editingSegmentId.value;
-    if (id) deleteSegmentAndReport(registry, id);
+    if (id) deleteUnlockedSegment(registry, id);
     stopEditing(false);
   }
 
 
@@ -1,40 +1,6 @@
-import { maskHasContent } from '@/src/segmentation/model';
 import type { SegmentRegistry } from '@/src/segmentation/segmentRegistry';
-import { useSegmentationStore } from '@/src/segmentation/store';
-import { useMessageStore } from '@/src/store/messages';
-import { AnnotationToolStoreMap } from '@/src/store/tools';
-import { plural } from '@/src/utils';
 
-/**
- * What deleting a segment is about to take with it, counted before the cascade
- * runs: its mask on every image, and every finished annotation naming it. A
- * tool still being placed is not counted, because the cascade leaves it alone,
- * and neither is a mask record with nothing in it: the cascade drops the
- * record, but the user never put anything on that image to lose.
- */
-function countCascade(segmentId: string) {
-  // A segment has at most one mask per image, so this counts both.
-  const images = useSegmentationStore()
-    .masksOfSegment(segmentId)
-    .filter(maskHasContent).length;
-  const annotations = Object.values(AnnotationToolStoreMap).reduce(
-    (total, useStore) =>
-      total +
-      useStore().finishedTools.filter((tool) => tool.segmentId === segmentId)
-        .length,
-    0
-  );
-  return { images, annotations };
-}
-
-/**
- * Deletes a segment and says what went with it. The cascade reaches masks on
- * images this one is not viewing and annotations on other slices and axes, so
- * its scope is invisible from here and there is no undo: the same reason
- * `removeSelectedTools` reports its count. No dialog asks first, which is what
- * the rest of the app does.
- */
-export function deleteSegmentAndReport(
+export function deleteUnlockedSegment(
   registry: SegmentRegistry,
   segmentId: string
 ) {
@@ -43,14 +9,5 @@ export function deleteSegmentAndReport(
     registry.appearanceOf(segmentId).locked
   )
     return;
-  const { images, annotations } = countCascade(segmentId);
   registry.deleteSegment(segmentId);
-
-  const removed = [
-    images > 0 &&
-      `${images} ${plural(images, 'mask')} on ${images} ${plural(images, 'image')}`,
-    annotations > 0 && `${annotations} ${plural(annotations, 'annotation')}`,
-  ].filter((part): part is string => !!part);
-  if (removed.length > 0)
-    useMessageStore().addInfo(`Deleted ${removed.join(' and ')}`);
 }
@@ -51,7 +51,7 @@ const DRAWING_TOOLS = [
 ];
 
 describe('Annotations sidebar', () => {
-  it('deletes a segment with its painted mask and measurement and reports what was removed', async () => {
+  it('deletes a segment with its painted mask and measurement without a notification', async () => {
     const { axialView } = await placeRectangle();
     await volViewPage.activatePaint();
     await volViewPage.paintStrokeOnView(axialView);
@@ -67,9 +67,11 @@ describe('Annotations sidebar', () => {
     await expect(axialView.$('svg rect')).not.toExist();
     await expect(volViewPage.saveSegmentsButtons[0]).toBeDisabled();
     await volViewPage.notifications.click();
-    await expect($('.message-center .header > span')).toHaveText(
-      'Deleted 1 mask on 1 image and 1 annotation'
+    await expect($('.message-center')).toBeDisplayed();
+    const titles = await $$('.message-center .header > span').map((title) =>
+      title.getText()
     );
+    expect(titles.some((title) => title.startsWith('Deleted '))).toBe(false);
   });
 
   it('keeps the Segments list in place and selected across tool switches', async () => {