diff --git a/shanoir-ng-front/src/app/studies/study/tree.service.ts b/shanoir-ng-front/src/app/studies/study/tree.service.ts
index 516513b7c1..2b65187cb6 100644
--- a/shanoir-ng-front/src/app/studies/study/tree.service.ts
+++ b/shanoir-ng-front/src/app/studies/study/tree.service.ts
@@ -231,31 +231,36 @@ export class TreeService {
     }
 
     private selectNode(selection: Selection): Promise<ShanoirNode> {
+        let node: Promise<ShanoirNode>;
         if (selection?.type == 'dataset') {
-            return this.selectDataset(selection.entity as Dataset);
+            node = this.selectDataset(selection.entity as Dataset);
         } else if (selection?.type == 'dicomMetadata') {
-            return this.selectDicomMetadata(selection.entity as Dataset);
+            node = this.selectDicomMetadata(selection.entity as Dataset);
         } else if (selection?.type == 'subject') {
-            return this.selectSubject(selection.id);
+            node = this.selectSubject(selection.id);
         } else if (selection?.type == 'acquisition') {
-            return this.selectAcquisition(selection.entity as DatasetAcquisition);
+            node = this.selectAcquisition(selection.entity as DatasetAcquisition);
         } else if (selection?.type == 'processing') {
-            return this.selectProcessing(selection.entity as DatasetProcessing);
+            node = this.selectProcessing(selection.entity as DatasetProcessing);
         } else if (selection?.type == 'examination') {
-            return this.selectExamination(selection.entity as Examination);
+            node = this.selectExamination(selection.entity as Examination);
         } else if (selection?.type == 'center') {
-            return this.selectCenter(selection.id);
+            node = this.selectCenter(selection.id);
         } else if (selection?.type == 'equipment') {
-            return this.selectEquipment(selection.entity as AcquisitionEquipment);
+            node = this.selectEquipment(selection.entity as AcquisitionEquipment);
         } else if (selection?.type == 'qualitycard') {
-            return this.selectQualitycard(selection.id);
+            node = this.selectQualitycard(selection.id);
         } else if (selection?.type == 'studycard') {
-            return this.selectStudycard(selection.id);
+            node = this.selectStudycard(selection.id);
         } else if (selection?.type == 'user') {
-            return this.selectUser(selection.id);
+            node = this.selectUser(selection.id);
         } else if (selection?.type == 'coil') {
-            return this.selectCoil(selection.entity as Coil);
-        } else return Promise.resolve(null);
+            node = this.selectCoil(selection.entity as Coil);
+        } else node = Promise.resolve(null);
+        node.then(n => {
+            if(!!n) n.hidden = false;
+        });
+        return node;
     }
 
     private selectDataset(dataset: number | Dataset): Promise<DatasetNode> {
@@ -584,13 +589,23 @@ export class TreeService {
         members.sort((a: MemberNode, b: MemberNode) => {
             return a.label.toLowerCase().localeCompare(b.label.toLowerCase())
         })
-        studyNode.subjectsNode = new SubjectsNode(studyNode, null, 'Subjects', subjects);
+        studyNode.subjectsNode = new SubjectsNode(studyNode, null, 'Subjects', subjects.concat(this.generateSubs(100, studyNode.subjectsNode)));
         studyNode.centersNode = new CentersNode(studyNode, null, 'Centers', centers);
         studyNode.membersNode = new MembersNode(studyNode, null, 'Members', members);
         studyNode.membersNode.open();
         return studyNode;
     }
 
+    generateSubs(times: number, parent: ShanoirNode): SubjectNode[] {
+        let res = [];
+        for (let i = 0; i < times; i++) {
+            let n: SubjectNode = new ClinicalSubjectNode(parent, 100000 + i, 'test ' + i, [], [], null, true, false);
+            (n.examinations as ExaminationNode[]).push(new ExaminationNode(n, 100000 + i, 'test', UNLOADED, UNLOADED, true, true, false));
+            res.push(n);
+        }
+        return res;
+    }
+
     unSelectAll() {
         this.unSelectNode(this.studyNode);
     }
diff --git a/shanoir-ng-front/src/app/studies/tree/study-node.component.css b/shanoir-ng-front/src/app/studies/tree/study-node.component.css
index bfb10adbc3..568bb1719c 100644
--- a/shanoir-ng-front/src/app/studies/tree/study-node.component.css
+++ b/shanoir-ng-front/src/app/studies/tree/study-node.component.css
@@ -1,3 +1,13 @@
 .overmenu input { height: 16px; }
 .overmenu .filter { margin-left: 10px; }
-.overmenu:has(input:focus) { visibility: visible; }
\ No newline at end of file
+.overmenu:has(input:focus) { visibility: visible; }
+
+.fake-node { margin-left: 22px; height: 24.5px; }
+.fake-node a { all: unset; }
+.fake-node i { margin-right: 6px; }
+.fake-node .chevron { vertical-align: -5px; cursor: pointer; }
+.fake-node .picto { color: var(--color-b); margin-right: 0px; }
+.fake-node .inner { display: inline-block; vertical-align: -4px; cursor: pointer; margin-right: 16px; }
+.fake-node .tag { border: 1px solid var(--grey); border-radius: 10px; padding: 0 5px; margin: 0 2px; font-size: 10px; display: inline-block; line-height: 18px; vertical-align: top; }
+.fake-node .tag i { margin-right: 3px; }
+.fake-node .dark { color:white }
\ No newline at end of file
diff --git a/shanoir-ng-front/src/app/studies/tree/study-node.component.html b/shanoir-ng-front/src/app/studies/tree/study-node.component.html
index 8d9cf70f18..9356369e42 100644
--- a/shanoir-ng-front/src/app/studies/tree/study-node.component.html
+++ b/shanoir-ng-front/src/app/studies/tree/study-node.component.html
@@ -35,7 +35,6 @@
             label="Subjects"
             awesome="fas fa-user-injured"
             [(opened)]="node.subjectsNode.opened"
-            (openedChange)="onOpenedChange($event)"
             (labelClick)="subjectsMenuOpened = !subjectsMenuOpened"
             [hasChildren]="hasDependency(node.subjectsNode.subjects)">
 
@@ -60,17 +59,30 @@
         </div>
 
         <ng-container *ngIf="node.subjectsNode.opened && node.subjectsNode.subjects && node.subjectsNode.subjects != $any('UNLOADED')">
-            <subject-node
-                    *ngFor="let subject of filteredNodes || node.subjectsNode.subjects"
-                    [input]="subject"
-                    [studyId]="node.id"
-                    (selectedChange)="selectedChange.emit(node)"
-                    [hasBox]="hasBox"
-                    [withMenu]="withMenu"
-                    [rights]="rights"
-                    (nodeInit)="onSubjectNodeInit()"
-            >
-            </subject-node>
+            <ng-container *ngFor="let subject of filteredNodes || node.subjectsNode.subjects; trackBy:trackByFn; let i = index">
+                @if (!subject.hidden) {
+                    <subject-node
+                            [input]="subject"
+                            [studyId]="node.id"
+                            (selectedChange)="selectedChange.emit(node)"
+                            [hasBox]="hasBox"
+                            [withMenu]="withMenu"
+                            [rights]="rights"
+                    >
+                    </subject-node>
+                } @else {
+                    <div class="fake-node">
+                        <i class="fas fa-angle-right chevron" (click)="clickOpen(subject)"></i>
+                        <a [routerLink]="['/subject/details/', subject.id]" class="inner" (click)="clickNode(subject)">
+                            <i [class]="subject.awesome" class="picto"></i>
+                            {{subject.label}}
+                        </a>
+                        <span class="tag label" [class.dark]="getFontColor(tag.color)" [style.background]="tag.color" *ngFor="let tag of subject.tags">
+                            {{tag.name}}
+                        </span>
+                    </div>
+                }
+            </ng-container>
         </ng-container>
 
     </node>
diff --git a/shanoir-ng-front/src/app/studies/tree/study-node.component.ts b/shanoir-ng-front/src/app/studies/tree/study-node.component.ts
index 2b6c871d3c..35032f6866 100644
--- a/shanoir-ng-front/src/app/studies/tree/study-node.component.ts
+++ b/shanoir-ng-front/src/app/studies/tree/study-node.component.ts
@@ -28,8 +28,10 @@ import {
 import { StudyRightsService } from "../shared/study-rights.service";
 import { StudyUserRight } from '../shared/study-user-right.enum';
 import { Study } from '../shared/study.model';
-import { TreeService } from '../study/tree.service';
+import { Selection, TreeService } from '../study/tree.service';
 import { TreeNodeAbstractComponent } from 'src/app/shared/components/tree/tree-node.abstract.component';
+import { Entity } from 'src/app/shared/components/entity/entity.abstract';
+import { isDarkColor } from 'src/app/utils/app.utils';
 
 export type Sort = {field: 'name' | 'id', way : 'asc' | 'desc'}
 
@@ -53,8 +55,6 @@ export class StudyNodeComponent extends TreeNodeAbstractComponent<StudyNode> imp
     filter: string;
     filteredNodes: SubjectNode[];
     subjectsOrder: Sort;
-    protected nbSubjectsInit: number = 0;
-    private subjectsInited: SuperPromise<void>;
 
     constructor(
             private router: Router,
@@ -85,18 +85,16 @@ export class StudyNodeComponent extends TreeNodeAbstractComponent<StudyNode> imp
             let id: number = this.input instanceof StudyNode ? this.input.id : this.input.study.id;
             this.idPromise.resolve(id);
             if (this.input instanceof StudyNode) {
-                this.subjectsInited = new SuperPromise();
-                this.nbSubjectsInit = 0;
                 this.node = this.input;
             } else if (this.input.study && this.input.rights) {
-                this.subjectsInited = new SuperPromise();
-                this.nbSubjectsInit = 0;
                 this.node = this.treeService.buildStudyNode(this.input.study, this.input.rights);
             } else {
                 throw new Error('Illegal argument type');
             }
             this.sortSubjects({field: 'name', way: 'asc'});
-            this.node.subjectsNode.registerOpenPromise(this.subjectsInited);
+            if (!!this.node.subjectsNode.subjects && this.node.subjectsNode.subjects != UNLOADED) {
+                this.node.subjectsNode.subjects.forEach(s => s.hidden = !this.treeService.isSelected(s.id, 'subject'));
+            }
             this.nodeInit.emit(this.node);
             this.showDetails = this.router.url != this.detailsPath + this.node.id;
         }
@@ -172,16 +170,20 @@ export class StudyNodeComponent extends TreeNodeAbstractComponent<StudyNode> imp
         }
     }
 
-    onSubjectNodeInit() {
-        this.nbSubjectsInit++;
-        if (this.nbSubjectsInit == this.node.subjectsNode?.subjects?.length) {
-            this.subjectsInited.resolve();
-        }
+    trackByFn(index, item: Entity) {
+        return item.id;
     }
 
-    onOpenedChange(state) {
-        if (!state) {
-            this.nbSubjectsInit = 0;
-        }
+    protected clickNode(node: SubjectNode) {
+        node.hidden = false;
+    }
+
+    protected clickOpen(node: SubjectNode) {
+        node.opened = true;
+        node.hidden = false;
+    }
+
+    getFontColor(colorInp: string): boolean {
+        return isDarkColor(colorInp);
     }
 }
diff --git a/shanoir-ng-front/src/app/tree/tree.model.ts b/shanoir-ng-front/src/app/tree/tree.model.ts
index 96611e69da..919cfaffe3 100644
--- a/shanoir-ng-front/src/app/tree/tree.model.ts
+++ b/shanoir-ng-front/src/app/tree/tree.model.ts
@@ -35,6 +35,7 @@ export abstract class ShanoirNode {
     private openPromise: Promise<void>;
     protected readonly routeBase: string;
     getTop: () => number; // to scroll to the node
+    hidden: boolean = false;
 
     constructor(
         public parent: ShanoirNode,
@@ -46,6 +47,7 @@ export abstract class ShanoirNode {
 
     open(): Promise<void> {
         if (!this._opened) {
+            this.hidden = false;
             if (this.parent) {
                 this.parent.open();
             }
@@ -53,7 +55,7 @@ export abstract class ShanoirNode {
                 // removing timeout may cause random bugs in the tree
                 this._opened = true;
             });
-            return (this.openPromise || Promise.resolve()).then(() => SuperPromise.timeoutPromise());
+            return SuperPromise.timeoutPromise().then(() => (this.openPromise || Promise.resolve()));
         } else {
             return Promise.resolve();
         }
@@ -191,7 +193,6 @@ export class MembersNode extends ShanoirNode {
 
 
 export abstract class SubjectNode extends ShanoirNode {
-
     constructor(
         public parent: ShanoirNode,
         public id: number,