Final answer:
A maternal tumor resulting from abnormal fetal tissue from the placental implantation site is called a choriocarcinoma. It is characterized by the absence of villi and the proliferation of cytotrophoblasts.
Step-by-step explanation:
A maternal tumor resulting from abnormal fetal tissue from the placental implantation site is known as a choriocarcinoma. In this condition, the tumor originates from the trophoblast cells, specifically the cytotrophoblast cells. Choriocarcinoma is characterized by the absence of villi and the proliferation of cytotrophoblasts.
Choriocarcinoma is a malignant and aggressive form of trophoblastic disease.
Key features of choriocarcinoma include:
Origin:
Arises from trophoblastic cells, specifically the chorionic tissue.
Histology:
Characterized by the presence of syncytiotrophoblasts and cytotrophoblasts.
There is a rapid and abnormal proliferation of these trophoblastic cells.
Invasiveness:
Choriocarcinoma is highly invasive and has the potential to spread (metastasize) quickly to other organs, such as the lungs, liver, and brain.
Clinical Features:
Presents with abnormal vaginal bleeding, an enlarged uterus, and other symptoms related to metastasis.
Choriocarcinoma can occur following a complete hydatidiform mole (molar pregnancy), a normal pregnancy, or even a miscarriage.
Diagnosis:
Diagnosis is typically confirmed through histological examination of biopsy samples obtained during a dilation and curettage (D&C) procedure.
Treatment:
Choriocarcinoma is a highly treatable but aggressive malignancy.
Treatment often involves a combination of surgery (such as hysterectomy), chemotherapy, and sometimes radiation therapy.
Chemotherapy is particularly effective in treating choriocarcinoma, and multiple agents may be used.
Prognosis:
With prompt and appropriate treatment, the prognosis for choriocarcinoma is generally favorable, and many patients achieve a complete cure.
Choriocarcinoma is a rare condition, and its management is typically coordinated by a specialized healthcare team that may include gynecologic oncologists and other specialists. If you suspect or have been diagnosed with choriocarcinoma, it's crucial to consult with a healthcare professional for a thorough evaluation and appropriate treatment plan.