Orris

Placental site trophoblastic tumors and make detail s p df

Reading File
Finding Sources
Finding Sources
Searching PubMed

"placental site trophoblastic tumor" diagnosis treatment

Reading File
Reading File
Reading File
Reading Article

PMID: 39322463

Reading File
Finding Sources
Reading Article

PMID: 40631439

Finding Sources
Finding Sources
Loading Image
Loading Image
Reading File
Finding Sources
Reading File
Running Command

ls /home/daytona/workspace/ 2>/dev/null && echo "---" && python3 -c "import repo…

Running Command

mkdir -p /home/daytona/workspace/pstt-pdf && cat > /home/daytona/workspace/pstt-…

Running Command

cd /home/daytona/workspace/pstt-pdf && python3 generate_pstt_pdf.py 2>&1

Running Command

ls -lh /home/daytona/workspace/pstt-pdf/PSTT_Detailed_Review.pdf

Your detailed PSTT PDF is ready (6.2 MB, ~18 sections):

PSTT Detailed Review

PDF Document · PDF

What's Inside - Placental Site Trophoblastic Tumor: Full Summary

Cell of Origin

PSTT arises from extravillous (intermediate) trophoblasts - the cells that normally invade the maternal decidua and myometrium during implantation. These cells overlap cytotrophoblast and syncytiotrophoblast features but are distinct from both.

Key Distinguishing Features vs. Choriocarcinoma

FeaturePSTTChoriocarcinoma
hCGLow / normalMarkedly elevated
Primary markerhPLhCG
HistologyMononuclear cells, vessel invasionBiphasic, hemorrhage, necrosis
Chemo sensitivityResistantHighly sensitive
Primary RxHysterectomyChemotherapy
WHO risk scoreNot appliedApplied

Pathology

  • Polygonal mononuclear/binucleated cells with abundant cytoplasm
  • "Splay-apart" invasion of smooth muscle fibers without destruction
  • Fibrinoid deposition; replaces vascular endothelium
  • IHC: hPL strong+, hCG focal+, Mel-CAM+, p63 negative (p63+ = ETT, not PSTT)
Histology image below (from Robbins Pathologic Basis of Disease):
PSTT Histology - atypical trophoblasts splaying apart myometrial smooth muscle fibers

Staging & Risk (FIGO)

  • Stage I (uterus confined) = low risk; surgery curative in >90%
  • High risk = Stage II+ OR interval from antecedent pregnancy >= 48 months

Treatment

  1. Hysterectomy - primary and often curative for Stage I
  2. Multi-agent chemotherapy (EMA-CO, EMA-EP, TP/TE) for high-risk/metastatic disease
  3. Pembrolizumab (anti-PD-1) - now considered in recurrent/refractory disease per 2024-2025 updates (Wang et al. 2024; Ngan et al. 2025)
  4. Fertility-sparing surgery - only for carefully selected Stage I patients (limited case reports)

ETT vs. PSTT

ETT (Epithelioid Trophoblastic Tumor) is a closely related but distinct entity: p63 positive, hyaline material, geographic necrosis, tends to be cervical. Both are managed primarily with surgery.
Sources: Robbins Basic Pathology 10e, Robbins Pathologic Basis of Disease 10e, Berek & Novak's Gynecology 16e, PubMed PMID 39322463 & 40631439.
This is a shared conversation. Sign in to Orris to start your own chat.