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The effectiveness of Cerclage for the reduction of extreme preterm birth and
perinatal mortality in Twin pregnancies with a short cervix.

To assess the effectiveness of a cerclage in women with a twin pregnancy with a midpregnancy short cervix compared to standard treatment (no cerclage) in the prevention of extreme preterm birth (PTB) < 28 weeks of GA.

Melanoma Margins Trial-II: 1cm v 2cm Wide Surgical Excision Margins for AJCC Stage II Primary Cutaneous Melanoma (MelMarT-II)

This study will determine whether there is a difference in disease free survival for patients treated with either a 1cm excision margin or 2cm margin for clinical stage II (pT2b-pT4b) primary cutaneous melanoma (AJCC 8th edition, Table 1). The…

A prospective, randomized study comparing chemotherapy versus chemotherapy plus immunotherapy in patients with advanced non-small cell lung cancer with low TMB and oncogenic driver, STK11, KEAP1 or NFE2L2 mutation and a PD-L1 TPS

To compare the objective response rate between patients with metastatic non-small cell lung cancer characterized by PDL-1 TPS<50% and low TMB and either actionable mutation, inactivating STK11, KEAP1 or NFE2L2 mutations, treated by…

TUbectomy with delayed oophorectomy as alternative for risk-reducing salpingo-oophorectomy in BrcA-Women to assess the Safety of Prevention: the TUBA-WISP II study

To evaluate RRS with delayed RRO as an alternative for RRSO in BRCA1/2 gene germline mutation carriers. We hypothesize that RRS with delayed RRO leads to an equal ovarian cancer incidence when compared to RRSO.

Personalized elective neck irradiation guided by sentinel lymph node biopsy in patients with squamous cell carcinoma of the oropharynx, larynx or hypopharynx with a clinically negative neck: (chemo)radiotherapy to the PRIMary tumor Only. The PRIMO study.

To compare safety and efficacy of treatment with sentinel lymph node biopsy guided elective neck irradiation versus standard elective neck irradiation in patients receiving definitive (chemo)radiotherapy for squamous cell carcinoma of the…

The PRECISE-study: an investigation into combined kidney stone surgery

The primary objective of the study is to determine whether ECIRS, the combined procedure of PCNL and URS, is superior in stone extraction when compared to PCNL. This will be determined by investigating the difference in percentage of stone free…