in Fig. 3 : a lung section hybridized with a digoxigeninlabeled SP-A probe to analyze the transcriptional activity in situ; the reddish signals of the transcripts are visible in the cytoplasm of type II pneumocytes. When analyzing the expression of SP-A in histological sections in context with other molecules of the pulmonary cytokine network one can expect further clues for the scenarios taking place in the course of interstitial lung diseases.