None of the 15 cases with hyaline-membrane formation showed plasminogen-activator activity when lung cubes were employed in the study. Two of 11 specimens, however, showed such activity upon ...

Histology revealed intersecting atypical spindled cells with slit-like vascular spaces, extravasated red blood cells, and cytoplasmic eosinophilic hyaline globules (Fig. 1).

Hyaline vascular Castleman disease is traditionally regarded as a reactive hyperplastic process. Occasional cases, however, have been reported with cytogenetic anomalies bringing this concept into ...