Track this trial free. DataLookout checks ClinicalTrials.gov daily and emails you which fields changed on NCT04569591 (status, enrollment, completion dates, endpoints, sites) when this record is updated. Free accounts track up to 5 trials.
MinorStart date: Mar 11, 2026 to Mar 12, 2026v1240
NotableTrial status: Not Yet Recruiting to RecruitingStart date: Mar 10, 2026 to Mar 11, 2026 · Site details revisedv1239Show 2 more changesShow less
Start date: Mar 10, 2026 to Mar 11, 2026
Site details revised
MinorStart date: Mar 9, 2026 to Mar 10, 2026v1238
NotablePrimary and study completion dates: Apr 20, 2026 to Feb 26, 2028Primary endpoint revised · Start date: Mar 5, 2026 to Mar 9, 2026 · Interventions: Acthrel (Drug) to Desmopressin acetate (Drug) · 2 morev1237Show 5 more changesShow less
Primary endpoint revised
Start date: Mar 5, 2026 to Mar 9, 2026
Interventions: Acthrel (Drug) to Desmopressin acetate (Drug)
MinorStart date: Feb 25, 2026 to Feb 26, 2026v1231
MinorStart date: Feb 24, 2026 to Feb 25, 2026v1230
MinorStart date: Feb 23, 2026 to Feb 24, 2026v1229
MinorStart date: Feb 22, 2026 to Feb 23, 2026v1228
MinorStart date: Feb 9, 2026 to Feb 22, 2026v1227
MinorStart date: Feb 3, 2026 to Feb 9, 2026v1226
MinorStart date: Feb 2, 2026 to Feb 3, 2026v1225
MinorStart date: Feb 1, 2026 to Feb 2, 2026v1224
MinorStart date: Jan 29, 2026 to Feb 1, 2026v1223
MinorStart date: Jan 28, 2026 to Jan 29, 2026v1222
MinorStart date: Jan 27, 2026 to Jan 28, 2026v1221
MinorStart date: Jan 26, 2026 to Jan 27, 2026v1220
MinorStart date: Jan 22, 2026 to Jan 26, 2026v1219
MinorStart date: Jan 21, 2026 to Jan 22, 2026v1218
MinorStart date: Jan 20, 2026 to Jan 21, 2026v1217
MinorStart date: Jan 19, 2026 to Jan 20, 2026v1216
MinorStart date: Jan 18, 2026 to Jan 19, 2026v1215
MinorStart date: Jan 15, 2026 to Jan 18, 2026v1214
MinorStart date: Jan 14, 2026 to Jan 15, 2026v1213
MinorStart date: Jan 13, 2026 to Jan 14, 2026v1212
MinorStart date: Jan 12, 2026 to Jan 13, 2026v1211
MinorStart date: Jan 11, 2026 to Jan 12, 2026v1210
MinorStart date: Jan 8, 2026 to Jan 11, 2026v1209
MinorStart date: Jan 6, 2026 to Jan 8, 2026v1208
MinorPrimary and study completion dates: Dec 31, 2025 to Apr 20, 2026Start date: Dec 30, 2025 to Jan 6, 2026v1207Show 1 more changeShow less
Start date: Dec 30, 2025 to Jan 6, 2026
MinorStart date: Dec 29, 2025 to Dec 30, 2025v1206
MinorStart date: Dec 28, 2025 to Dec 29, 2025v1205
MinorStart date: Dec 25, 2025 to Dec 28, 2025v1204
MinorStart date: Dec 24, 2025 to Dec 25, 2025v1203
MinorStart date: Dec 23, 2025 to Dec 24, 2025v1202
MinorStart date: Dec 22, 2025 to Dec 23, 2025v1201
MinorStart date: Dec 21, 2025 to Dec 22, 2025v1200
MinorStart date: Dec 18, 2025 to Dec 21, 2025v1199
MinorStart date: Dec 16, 2025 to Dec 18, 2025v1198
Stopped: an ongoing trial was terminated, suspended or withdrawn.
Notable: the trial’s plan changed such as a big move in its timeline or size, a new primary endpoint, sponsor or phase, or recruiting opened or resumed.
Minor: routine progress and housekeeping, such as sites added or enrollment closed.
This study is designed as a single institution trial. The study utilizes safe and clinically-validated tools for preoperative workup of patients with small pituitary tumors. DDAVP stimulation and 18F-labeled fluoro-deoxyglucose (FDG) uptake for PET-imaging will be used to detect MRI-negative pituitary adenomas in patients with Cushing s disease. Patients who have MRI-negative pituitary microadenomas will undergo FDG PET-imaging with DDAVP stimulation. Intravenous FDG will be given approximately four hours following DDAVP administration. Within 12 weeks after completion of the FDG high-resolution PET scan, patients will undergo surgical resection of the pituitary adenoma. Surgical and histological confirmation of adenoma location will be noted. All images will be read independently by neuroradiologists blinded to clinical and histopathological outcomes. The diagnostic and localization accuracy of PET-imaging will be assessed by comparing the PET findings with histopathology.