Which of the following describes sonological findings of Placenta accreta?
**Core Concept**
Placenta accreta is a pregnancy complication characterized by the abnormal implantation of the placenta, leading to its invasion into the myometrium. This condition is often associated with placenta previa, a condition where the placenta partially or completely covers the internal cervical os.
**Why the Correct Answer is Right**
Sonological findings of placenta accreta include the presence of a placental mass with a thin, irregularly shaped myometrium between the placenta and the uterine serosa. This irregular interface between the placenta and the myometrium is a hallmark of placenta accreta. The condition may also be associated with the presence of a retroplacental vasa previa, which is a significant risk factor for antepartum hemorrhage. The presence of a placental mass with irregular interfaces on ultrasound is often indicative of placenta accreta.
**Why Each Wrong Option is Incorrect**
**Option A:** Normal placental implantation is characterized by a well-defined interface between the placenta and the myometrium, which is not present in placenta accreta.
**Option B:** Placenta previa is a condition where the placenta partially or completely covers the internal cervical os, but it does not necessarily involve the invasion of the placenta into the myometrium.
**Option C:** Placenta increta involves the invasion of the placenta into the myometrium, but it does not extend beyond the myometrium into the uterine serosa.
**Clinical Pearl / High-Yield Fact**
It's essential to note that placenta accreta is often associated with a history of previous uterine surgery, such as cesarean sections or dilation and curettage (D&C) procedures. This association highlights the importance of a thorough medical history in the diagnosis of placenta accreta.
**Correct Answer:** C.