diff --git a/Classes/DataProcessing/DataProcessingTrait.php b/Classes/DataProcessing/DataProcessingTrait.php
index 844cbd4a..bf9b0242 100644
--- a/Classes/DataProcessing/DataProcessingTrait.php
+++ b/Classes/DataProcessing/DataProcessingTrait.php
@@ -20,18 +20,33 @@ trait DataProcessingTrait
      */
     protected function removeDataIfnotAppendInConfiguration(array $processorConfiguration, array $processedData): array
     {
-        if (!isset($processorConfiguration['appendData']) ||
-            (int)$processorConfiguration['appendData'] === 0) {
-            unset($processedData['data']);
-            if (isset($processorConfiguration['as'], $processedData[$processorConfiguration['as']])
-                && is_array($processedData[$processorConfiguration['as']])) {
+        if (
+            !isset($processorConfiguration['appendData']) ||
+            (int)$processorConfiguration['appendData'] !== 1
+        ) {
+            // Items to keep
+            $removeAll = !isset($processorConfiguration['appendData']) || $processorConfiguration['appendData'] == 0;
+            $keepItems = $removeAll ? [] : array_flip(array_map('trim', explode(',', $processorConfiguration['appendData'])));
+            if ($removeAll) {
+                unset($processedData['data']);
+            } else {
+                $processedData['data'] = array_intersect_key($processedData['data'], $keepItems);
+            }
+            if (
+                isset($processorConfiguration['as'], $processedData[$processorConfiguration['as']])
+                && is_array($processedData[$processorConfiguration['as']])
+            ) {
                 foreach ($processedData[$processorConfiguration['as']] as &$item) {
                     if (is_array($item) && isset($item['data'])) {
-                        unset($item['data']);
+                        if ($removeAll) {
+                            unset($item['data']);
+                        } else {
+                            $item['data'] = array_intersect_key($item['data'], $keepItems);
+                        }
                     }
 
                     if ($this->isMenuProcessor() && isset($item['children']) && is_array($item['children'])) {
-                        $this->removeDataInChildrenNodes($item['children']);
+                        $this->removeDataInChildrenNodes($item['children'], $removeAll, $keepItems);
                     }
                 }
             }
@@ -49,12 +64,18 @@ protected function isMenuProcessor(): bool
      * Removes recursively "data" in children nodes
      *
      * @param array $children
+     * @param bool $removeAll
+     * @param array $keepItems
      * @param string $nodeName
      */
-    private function removeDataInChildrenNodes(array &$children, string $nodeName = 'children'): void
+    private function removeDataInChildrenNodes(array &$children, bool $removeAll, array $keepItems, string $nodeName = 'children'): void
     {
         foreach ($children as &$childrenItem) {
-            unset($childrenItem['data']);
+            if ($removeAll) {
+                unset($childrenItem['data']);
+            } else {
+                $childrenItem['data'] = array_intersect_key($childrenItem['data'], $keepItems);
+            }
             if (isset($childrenItem[$nodeName]) && is_array($childrenItem[$nodeName])) {
                 $this->removeDataInChildrenNodes($childrenItem[$nodeName], $nodeName);
             }