all of the `` '' classic '' '' ultrastructural features of smooth-muscle tumors , including subplasmalemmal dense patches , pinocytotic vesicles , cytoplasmic microfilaments and dense bodies , and focal basement membrane formation , were present in the leiomyoblastomas ; however , extensive sampling was commonly necessary to demonstrate such findings .
C1519091
, pinocytotic vesicl
C0010834
, cytoplasm