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Difference between revisions of "Placenta"
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*The change in mass/week is approximately linear and equal to 300 grams / 14 weeks ~ 20 grams/week. | *The change in mass/week is approximately linear and equal to 300 grams / 14 weeks ~ 20 grams/week. | ||
*The spread in mass between 10% and 90%, crudely estimated, is 200 grams (for GA=26-40). | *The spread in mass between 10% and 90%, crudely estimated, is 200 grams (for GA=26-40). | ||
=Overview of placental pathology= | |||
==Approach== | |||
The pathology of the placenta is diverse and is not easy to group. | |||
It terms of remembering things. It is probably easiest to take a combined anatomical, etiologic and morphologic approach. | |||
Anatomical basis: | |||
*Cord. | |||
*Membranes. | |||
*Disc. | |||
Etiologic: | |||
*Congential. | |||
*Infectious. | |||
*Neoplastic. | |||
*Endocrine. | |||
*Trauma. | |||
*Vascular. | |||
*Degenerative. | |||
*Autoimmune. | |||
*Toxic. | |||
*Idiopathic. | |||
Compartmental: | |||
*Vasculature. | |||
*Membranes. | |||
*Parenchyma: | |||
**Maternal part (decidua). | |||
**Fetal part (villi, cord). | |||
==Common entities/diagnoses== | |||
*Normal. | |||
*Chorioamnionitis. | |||
*Placental abruption. | |||
*Meconium. | |||
*Hypertensive changes. | |||
=Sign-out= | =Sign-out= | ||