distinctive ultrastructural features included pseudoacinar formation , microvilli , long cytoplasmic filopodia ( often with complex interdigitations ) , numerous desmosomes , partial basal lamina , scanty endoplasmic reticula , and numerous intracytoplasmic filaments 80 -- 100 a in width .
C0010834
cytoplasmic
C0014239
endoplasmic reticula