Benign Mesenchymal Tumors

Mesenchymal lung tumors are rare with the exception of hamartomas, which can be seen in about 7% of all lung tumors. However, many benign mesenchymal tumors exist, some of them so rare that one might see them once in a lifetime. Here, we have selected those mesenchymal tumors, which likely can be encountered in routine pathology. The knowledge is of importance, as malignant mesenchymal soft tissue tumors regularly metastasize into the lung. Therefore, a differentiation of primary versus metastatic tumors is of importance.