Placental Mesenchymal Dysplasia With Normal Fetus: A Rare Case Report

Placental mesenchymal dysplasia (PMD) is a rare benign placental abnormality. It is characterized by hydropic degeneration of stem villi, placentomegaly, and increased maternal serum alpha-fetoprotein(AFP). It can be associated with different congenital abnormalities, karyotype abnormalities, and feto-maternal morbidities. It is difficult to differentiate PMDfrom partial mole, complete mole with twin pregnancy in ultrasound, and in macroscopic examination. The current paper presentsa rare case of placental mesenchymal dysplasia in a young primigravida mother who delivered a normal fetus withnormal karyotype.
•Placental mesenchymal dysplasia is a very rare benign condition of placenta.
•Ultrasound and gross examinations closely mimic partial mole.
•Histopathology of the placenta is a definite methodofdiagnosis.
•It may be associated with various congenital abnormalities.
•If prenatal diagnosis is possible, close monitoring is necessary.