Serum galactomannan was positive in only one patient in our case series. Serum galactomannan is more specific for invasive aspergillosis than beta‐D‐glucan but has poor sensitivity in non‐neutropenic patients. 12  Combining three case series of CAPA, only three (13%) out of 23 patients had positive serum galactomannan level. 5 ,  6 ,  13  The less frequently elevated serum galactomannan levels might simply reflect colonisation rather than infection or suggest that angioinvasive pulmonary infection is a rare phenomenon in CAPA. In any case, the diagnostic value of serum galactomannan for CAPA seems less promising.