hamartomas of primitive chorionic mesenchyme ?
benign tumor of fetal blood vessels?
occurs in approximately 1% of pregnancies
|General Gross Description|
when arise from villous tissue-usually close to the fetal surface, may bulge from placental surface
can arise from umbilical cord
cut surfaces are fleshy, congested (red)
if infarcted, cut surface is tan
|General Microscopic Description|
external surface of tumor is covered by syncytiotrophoblasts
tumor resembles overgrown villus with extensive proliferation of vessels
may be infarcted with loss of nuclear detail
Benirschke,Kurt and Kaufmann,Peter Pathology of the Human Placenta, 2nd edition, New York: Springer-Verlag, 1990, p841-846.
Cunningham et al Williams Obstetrics, 19th edition Norwalk: Appleton and Lange, 1993, p759.
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||Synopsis by: Linda Ernst (T88100M91200)