Intrauterine infection with mumps virus

Area of Science:

• Reproductive pathology
• Viral teratology
• Maternal-fetal medicine

Background:

• Maternal infections during pregnancy can significantly impact fetal development and survival.
• Mumps virus (Paramyxoviridae family) is known for its potential to cause systemic illness.
• Understanding the specific histopathologic effects of gestational mumps is crucial for diagnosis and management.

Observation:

• Histopathologic examination of placental and fetal tissues from three cases of gestational mumps.
• Tissues were obtained from one spontaneous abortion and two therapeutic abortions.
• Detailed analysis of placental lesions, fetal visceral changes, and viral presence.

Findings:

• Severe placental lesions, characterized by diffuse proliferative necrotic villitis and fetal vascular circuit compromise.
• Significant fetal visceral lesions including necrosis and mineralization.
• Presence of viral inclusions in chorionic and fetal tissues, consistent with mumps virus infection.

Implications:

• The observed lesions strongly suggest a causal association between maternal mumps infection and severe adverse pregnancy outcomes.
• Necrotic villitis and fetal vascular damage are likely mechanisms leading to fetal demise.
• This study highlights the importance of considering gestational mumps in the differential diagnosis of fetal pathology.