Dittrich′s plugs in sputum: morphological observations

Three layer test in bronchiectasis

“…The three layer sputum consists of a foamy upper layer, mucous middle layer, and viscous purulent bottom layer [1]. The bottom layer consists of cell debris and sometimes Dittrich plugs may also be seen [2]. These are greyish white foul smelling masses of bacterial and fatty acid crystals, typically seen in suppurative lung disease.…”