Figure 5 . Lung microscopy showing the early phase of ARDSA. Hyaline membrane (green asterisk, x400). B. Type II pneumocyte proliferation and alveolar desquamation (x400). C.Microthrombi (blue arrows, x200). D. Microthrombi (blue arrows), Type II pneumocyte proliferation, atypical Type II pneumocyte (orange arrow), alveolar desquamation (x400).