prof. dr. G.D. Valk

Full Professor

  • Department of Endrocine Oncology

prof. dr. G.D. Valk

Research Programs


Endocrinology and endocrine oncology are the main focus of the clinical activities of Gerlof Valk. (Neuro-) endocrine tumors diagnosis, treatment and follow-up, care for patients with Multiple Endocrine Neoplasia (MEN) and the standardization and continuous improvement of the national care for patients with MEN are his specific areas of expertise. Epidemiologic and translational research within the field of MEN related (pancreatic) neuroendocrine tumors is his main research focus including innovative treatment strategies and personalized cancer care.



2014 – today 

Internist-endocrinologist, professor of endocrinology with emphasis on endocrine tumors, head of section endocrinology, program director endocrinology residency


2007 – 2014  

Internist-endocrinologist, vice program director internal medicine residency


1997 – 2001  

Senior researcher, Institute for Extramural Medical Research (EMGO Institute), Free University Medical Centre



2007 Certification National Board of Internal Medicine and Endocrinology

2002 MSc Clinical Epidemiology

1997 PhD Thesis: ‘The diagnosing of diabetic polyneuropathy in daily clinical practice’. Free University Medical Centre, Amsterdam

1994 Certification National Board of General Practitioners

1990 MD (cum laude)


Side Activities

  • Scientific director of the Parelsnoer Institute (PSI)

    National coordinator of the European Reference Network (ERN) Rare Endocrine Conditions

    Member of the daily board of BijnierNET

    Board member Dutch Society of Endrocrinology

Research Output (168)

Clinical management of neuroendocrine neoplasms (NENs)

Casey Ruth T, Valk Gerlof D, Schalin-Jäntti Camilla, Grossman Ashley B, Thakker Rajesh V aug 2020, In: European Journal of Endocrinology. 183 , p. G79-G88

MEN1-related pancreatic NETs: identification of unmet clinical needs and future directives:CURRENT STATE-OF-THE-ART AND RESEARCH OPPORTUNITIES: MEN1-related pancreatic NETs: identification of unmet clinical needs and future directives

Pieterman C R C, Sadowski S M, Maxwell J E, Katz M H G, Lines K E, Heaphy C M, Tirosh A, Blau J E, Perrier N D, Lewis M A, Metzcar J P, Halperin D M, Thakker R V, Valk G D aug 2020, In: Endocrine-Related Cancer. 27 , p. T9-T25

PSMA PET/CT Identifies Intrapatient Variation in Salivary Gland Toxicity From Iodine-131 Therapy

Mohan Vineet, Vogel Wouter V, Valk Gerlof D, de Boer Jan P, Lam Marnix G E H, de Keizer Bart 4 jul 2020, In: Molecular Imaging. 19 7 p.

Efficacy of alpha-Blockers on Hemodynamic Control during Pheochromocytoma Resection: A Randomized Controlled Trial:A randomized controlled trial

Buitenwerf Edward, Osinga Thamara E., Timmers Henri J.L.M., Lenders Jacques W.M., Feelders Richard A., Eekhoff Elisabeth M.W., Haak Harm R., Corssmit Eleonora P.M., Bisschop Peter H.L.T., Valk Gerlof D., Veldman Ronald Groote, Dullaart Robin P.F., Links Thera P., Voogd Magiel F., Wietasch Götz J.K.G., Kerstens Michiel N., 1 jul 2020, In: Journal of Clinical Endocrinology and Metabolism. 105 , p. 2381-2391 11 p.

Adrenalectomy for Primary Aldosteronism:Significant Variability in Work-Up Strategies and Low Guideline Adherence in Worldwide Daily Clinical Practice

Vorselaars Wessel M C M, van Beek Dirk-Jan, Suurd Diederik P D, Postma Emily, Spiering Wilko, Borel Rinkes Inne H M, Valk Gerlof D, Vriens Menno R, 1 jun 2020, In: World Journal of Surgery. 44 , p. 1905-1915 11 p.

Prognostic factors for the outcome of nonfunctioning pancreatic neuroendocrine tumors in MEN1:a systematic review of literature

Sadowski S M, Pieterman C R C, Perrier N D, Triponez F, Valk G D jun 2020, In: Endocrine-Related Cancer. 27 , p. R145-R161

Surgery for multiple endocrine neoplasia type 1-related insulinoma:long-term outcomes in a large international cohort

van Beek D J, Nell S, Verkooijen H M, Borel Rinkes I H M, Valk G D, Vriens M R, , 30 apr 2020, In: British Journal of Surgery. 107 , p. 1489-1499 11 p.

68Ga-PSMA PET/CT in radioactive iodine-refractory differentiated thyroid cancer and first treatment results with 177Lu-PSMA-617

de Vries Lisa H, Lodewijk Lutske, Braat Arthur J A T, Krijger Gerard C, Valk Gerlof D, Lam Marnix G E H, Borel Rinkes Inne H M, Vriens Menno R, de Keizer Bart 6 mrt 2020, In: EJNMMI Research. 10 8 p.

Alternative Lengthening of Telomeres and Differential Expression of Endocrine Transcription Factors Distinguish Metastatic and Non-metastatic Insulinomas

Hackeng Wenzel M, Schelhaas Willemien, Morsink Folkert H M, Heidsma Charlotte M, van Eeden Susanne, Valk Gerlof D, Vriens Menno R, Heaphy Christopher M, Nieveen van Dijkum Els J M, Offerhaus G Johan A, Dreijerink Koen M A, Brosens Lodewijk A A 26 feb 2020, In: Endocrine Pathology. 31 , p. 108-118 11 p.

Correction to:Correction to: Validation of the Aldosteronoma Resolution Score Within Current Clinical Practice (World journal of surgery (2019) 43 10 (2459-2468))

Vorselaars Wessel M.C.M., van Beek Dirk Jan, Postma Emily L., Spiering Wilko, Rinkes Inne H.M.Borel, Valk Gerlof D., Vriens Menno R., Engelsman Anton F., Nieveen van Dijkum Els J.M., jan 2020, In: World Journal of Surgery. 44 , p. 323 1 p.

All Research Output (168)