Lungs
Lung tissue was available in five out of the seven patients. One patient (Patient 4) showed findings of early acute respiratory distress syndrome (ARDS). This patient had hyaline membranes and edema in the alveoli. In all other patients (Patients 2, 3, 5, and 7), examination of the lung biopsy specimens revealed the organizing phase of ARDS. These patients had remarkable septal thickening and collagen increase. Table 2presents the details of the histopathologic findings of the lung biopsies. Figures 5 and 6 illustrate the epithelial and/or vascular diffuse alveolar damage, respectively.