The distinct invasiveness of the trophoblast and the intimacy of the junctional zone are associated with a characteristic fibrinoid material
, probably of trophoblastic origin (Kirby et al.
A histopathological examination revealed a cystic lesion in the paratesticular region that contained many hemosiderin-laden macrophages and an area of cystic degeneration containing broken, digested fibrinoid material surrounded by longitudinal muscles (Fig.
Area of cystic degeneration, fibrinoid material surrounded by longitudinal muscles.
Small nerve units were also caught up in this scarifying process, which failed to show necrobiotic foci, fibrinoid material
, or nuclear dust.
It was also noted that, when necrosis was overt, eosinophilic fibrinoid material
The diagnosis is best established with a histologic examination--or cytologically if the aspirate contains sufficient cells in addition to blood and fibrinoid material