Human pathology

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chronic intrauterine meconium aspiration

chronic intrauterine meconium aspiration (CIUMA)

Synopsis

- subpleural plate-infarcts of the lungs
- meconium-induced vasoconstriction of peripheral preacinar arteries

  • plexogenic arteriopathy
  • medionecrosis
  • obliterative hyaline sclerosis

- organized thrombi
- systemic-pulmonary arterial anastomoses

- pulmonary infarcts

  • inspissated meconium
  • granulomatous reaction

- lung rupture

- meconium-stained amniotic fluid

Associations

- rubella
- acute twin-twin transfusion following the intrauterine death of the co-twin

References

- Kearney MS. Chronic intrauterine meconium aspiration causes fetal lung infarcts, lung rupture, and meconium embolism. Pediatr Dev Pathol. 1999 Nov-Dec;2(6):544-51. PMID: 10508878

- Perlman EJ, Moore GW, Hutchins GM. The pulmonary vasculature in meconium aspiration. Hum Pathol. 1989 Jul;20(7):701-6. PMID: 2737662