Step 1: It helps to separate gestational trophoblastic disease into the benign molar pregnancies and the neoplastic (GTN) group that can invade or metastasise.
Step 2: The neoplastic bracket comprises invasive mole, choriocarcinoma, placental-site trophoblastic tumour, and epithelioid trophoblastic tumour. Each of these is listed under GTN.
Step 3: The partial mole sits in the molar pregnancy category rather than the neoplasm category, so when asked what GTN does not include, the partial mole is singled out.
\[\boxed{\text{Partial mole}}\]