Cellular and Fibrotic NSIP
Cellular and Fibrotic NSIP

Combined or mixed cellular and fibrotic NSIP are characterized by:

  • Mononuclear inflammatory cells diffusely involved in the interstitium
  • Irregular thickening and fusion of alveolar septa by fibrosis (fusion shown in the box)


The pleura (P) in this example is markedly thickened and inflamed