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Dive into the research topics where Nike M. M. L. Stikkelbroeck is active.

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Featured researches published by Nike M. M. L. Stikkelbroeck.


Obstetrical & Gynecological Survey | 2003

Fertility in women with congenital adrenal hyperplasia due to 21-hydroxylase deficiency.

Nike M. M. L. Stikkelbroeck; A.R.M.M. Hermus; Didi D.M. Braat; Barto J. Otten

Fertility in women with congenital adrenal hyperplasia (CAH) due to 21-hydroxylase deficiency appears to be reduced. The purpose of this review is to summarize the reported evidence about subfertility in women with CAH and to review the causes of reduced fertility. Compared with a non-CAH female population, pregnancy and live-birth rates are severely reduced in salt-wasting patients, mildly reduced in simple virilizing patients, and normal in nonclassical patients. Several factors have been suggested to contribute to the impaired fertility in CAH females: adrenal overproduction of androgens and progestins (17-hydroxyprogesterone and progesterone), ovarian hyperandrogenism, polycystic ovary syndrome, ovarian adrenal rest tumors, neuroendocrine factors, genital surgery, and psychological factors such as delayed psychosexual development, reduced sexual activity and low maternal feelings. It is obvious that these factors are interrelated. Improving endocrine, surgical, and psychological management could contribute to improving fertility chances in these patients. Target Audience: Obstetricians & Gynecologists, Family Physicians Learning Objectives: After completion of this article, the reader will be able to define the various types of CAH, to describe the fertility issues in the CAH patients, to outline the various other causes of hyperandrogenism, and to list the treatment options for the patient with CAH.


The Journal of Clinical Endocrinology and Metabolism | 2012

Genotype-phenotype analysis in congenital adrenal hyperplasia due to P450 oxidoreductase deficiency

Nils Krone; Nicole Reisch; Jan Idkowiak; Vivek Dhir; Hannah E Ivison; Beverly Hughes; Ian T. Rose; Donna M. O'Neil; Raymon Vijzelaar; Matthew J. Smith; Fiona MacDonald; Trevor R. Cole; Nicolai Adolphs; John S. Barton; Edward Blair; Stephen R. Braddock; Felicity Collins; Deborah L. Cragun; Mehul T. Dattani; Ruth Day; Shelley Dougan; Miriam Feist; Michael Gottschalk; John Welbourn Gregory; Michaela Haim; Rachel Harrison; Anne Haskins Olney; Berthold P. Hauffa; Peter C. Hindmarsh; Robert J. Hopkin

Context: P450 oxidoreductase deficiency (PORD) is a unique congenital adrenal hyperplasia variant that manifests with glucocorticoid deficiency, disordered sex development (DSD), and skeletal malformations. No comprehensive data on genotype-phenotype correlations in Caucasian patients are available. Objective: The objective of the study was to establish genotype-phenotype correlations in a large PORD cohort. Design: The design of the study was the clinical, biochemical, and genetic assessment including multiplex ligation-dependent probe amplification (MLPA) in 30 PORD patients from 11 countries. Results: We identified 23 P450 oxidoreductase (POR) mutations (14 novel) including an exonic deletion and a partial duplication detected by MLPA. Only 22% of unrelated patients carried homozygous POR mutations. p.A287P was the most common mutation (43% of unrelated alleles); no other hot spot was identified. Urinary steroid profiling showed characteristic PORD metabolomes with variable impairment of 17α-hydroxylase and 21-hydroxylase. Short cosyntropin testing revealed adrenal insufficiency in 89%. DSD was present in 15 of 18 46,XX and seven of 12 46,XY individuals. Homozygosity for p.A287P was invariably associated with 46,XX DSD but normal genitalia in 46,XY individuals. The majority of patients with mild to moderate skeletal malformations, assessed by a novel scoring system, were compound heterozygous for missense mutations, whereas nearly all patients with severe malformations carried a major loss-of-function defect on one of the affected alleles. Conclusions: We report clinical, biochemical, and genetic findings in a large PORD cohort and show that MLPA is a useful addition to POR mutation analysis. Homozygosity for the most frequent mutation in Caucasians, p.A287P, allows for prediction of genital phenotype and moderate malformations. Adrenal insufficiency is frequent, easily overlooked, but readily detected by cosyntropin testing.


European Radiology | 2004

Prevalence of ovarian adrenal rest tumours and polycystic ovaries in females with congenital adrenal hyperplasia: results of ultrasonography and MR imaging

Nike M. M. L. Stikkelbroeck; A.R.M.M. Hermus; Diana Schouten; Harold M. Suliman; Gerrit J. Jager; Didi D.M. Braat; Barto J. Otten

The aim of the investigation was to assess the prevalence of ovarian adrenal rest tumours and polycystic ovaries in female patients with congenital adrenal hyperplasia (CAH). Thirteen female CAH patients (median age 19.8 years, range 14.8–23.5 years) underwent transvaginal (n=6) or transabdominal (n=7) ultrasonography by a gynaecologist and MR imaging (n=13) of the ovaries (pre and post contrast-enhanced T1- and T2-weighted images). Ovarian adrenal rest tumours were defined as small hypoechoic and multifocal nodules on ultrasound and isointense lesions on T1- and hypointense on T2-weighted MR images (derived from characteristics of testicular adrenal rest tumours). Polycystic ovaries were defined as the presence of ≥10 follicles arranged peripherally around or scattered throughout increased stroma. No ovarian adrenal rest tumours were found either on ultrasound, or by MR imaging. Polycystic ovaries were found in 2 of the 13 patients (15.4%), both with ultrasound and MR. No ovarian adrenal rest tumours were detected in these female CAH patients, which suggests that ovarian adrenal rest tumours in CAH females are rare. The prevalence of polycystic ovaries corresponded to that in the general population. From these results, we would suggest that routine ovarian imaging in CAH females is not indicated. However, when ovarian dysfunction is present, ovarian imaging is advised, first by ultrasonography, to detect ovarian adrenal rest tumours or polycystic ovaries.


Acta Oncologica | 2013

High level of distress in long-term survivors of thyroid carcinoma: Results of rapid screening using the distress thermometer

Sean H. P. P. Roerink; Mischa De Ridder; J.B. Prins; Angelique Huijbers; Hans J. H. De Wilt; H.A.M. Marres; H. Repping-Wuts; Nike M. M. L. Stikkelbroeck; Henri Timmers; A.R.M.M. Hermus; Romana T. Netea-Maier

Abstract Context. Cancer patients are at increased risk for distress. The Distress Thermometer (DT) and problem list (PL) are short-tools validated and recommended for distress screening in cancer patients. Objective. To investigate the level of distress and problems experienced by survivors of differentiated non-medullary thyroid carcinoma (DTC), using the DT and PL and whether this correlates with clinical and demographical variables. Participants, design and setting. All 205 DTC patients, under follow-up at the outpatient clinic of our university hospital, were asked to fill in the DT and PL, hospital anxiety and depression scale (HADS), illness cognition questionnaire (ICQ) and an ad hoc questionnaire. Receiver Operator Characteristic analysis (ROC) was used to establish the optimal DT cut-off score according to HADS. Correlations of questionnaires scores with data on diagnosis, treatment and follow-up collected from medical records were analyzed. Results. Of the 159 respondents, 145 agreed to participate [118 in remission, median follow-up 7.2 years (range 3 months–41 years)]. Of these, 34.3% rated their distress score ≥5, indicating clinically relevant distress according to ROC analysis. Patients reported physical (86%) over emotional problems (76%) as sources of distress. DT scores correlated with HADS scores and ICQ subscales. No significant correlations were found between DT scores and clinical or demographical characteristics except for employment status. Conclusion. Prevalence of distress is high among patients with DTC even after long-term remission and cannot be predicted by clinical and demographical characteristics. DT and PL are useful screening instruments for distress in DTC patients and could easily be incorporated into daily practice.


Pharmacology & Therapeutics | 2011

Congenital adrenal hyperplasia--pharmacologic interventions from the prenatal phase to adulthood

H.L. Claahsen-van der Grinten; Nike M. M. L. Stikkelbroeck; Barto J. Otten; A.R.M.M. Hermus

Congenital adrenal hyperplasia (CAH) is one of the most common inherited autosomal recessive disorders, caused by deficiency of one of the enzymes involved in steroid synthesis. The clinical picture of the most prevalent form, i.e. 21-hydroxylase deficiency, is characterized by cortisol and mostly aldosterone deficiency and androgen excess (leading to congenital virilization in girls). Treatment consists of glucocorticoids, aimed at substitution of cortisol deficiency and, decrease of androgen excess. Usually supraphysiological doses of glucocorticoids are required to effectively suppress adrenal androgens. Furthermore, with the currently available glucocorticoid preparations, it is not possible to simulate a normal circadian rhythm in CAH patients. Therefore, it is a difficult task for (pediatric) endocrinologists to find the best balance between under- and overtreatment thereby avoiding important long term complications. In this review we will discuss the current pharmacologic treatment options. We give age dependent dose recommendations and describe the limitations of current treatment strategies. We discuss effects on fertility, bone density and cardiovascular risks. Recommendations about the use of glucocorticoids in case of fever or stress situations are given. The principles of treatment of non classic (mild) CAH are discussed in a separate section. Also prenatal therapy, to prevent congenital virilization of a female CAH newborn, is discussed. Furthermore, an overview of alternative pharmacological treatment options in the future is given.


Fertility and Sterility | 2003

Monitoring of menstrual cycles, ovulation, and adrenal suppression by saliva sampling in female patients with 21-hydroxylase deficiency.

Nike M. M. L. Stikkelbroeck; C. G. J. (Fred) Sweep; Didi D.M. Braat; A.R.M.M. Hermus; Barto J. Otten

OBJECTIVE To investigate the correlation between menstrual cycles, ovulation, and adrenal suppression in congenital adrenal hyperplasia. DESIGN Prospective observational study. SETTING An academic outpatient clinic. PATIENT(S) Five females with salt-wasting 21-hydroxylase deficiency, aged 15.5 to 22.9 years; one had amenorrhea, one had irregular bleeding, and three had regular bleeding. INTERVENTION(S) Daily morning saliva sampling for 40 to 280 days. MAIN OUTCOME MEASURE(S) Salivary levels of progesterone (P), 17-hydroxyprogesterone (17-OHP), and androstenedione. RESULT(S) In the amenorrheic patient, the elevated P and 17-OHP levels decreased when the glucocorticoid dose was increased, and subsequently menarche occurred. The androstenedione levels were normal. The correlations between P and 17-OHP levels before and after menarche suggest that adrenal progesterone had prevented menarche. The patient with irregular bleeding showed slightly elevated androstenedione levels and increased levels of 17-OHP and P in an irregular pattern, without correlation in time with vaginal bleeding. Three patients with regular cycles showed a biphasic pattern of P levels, indicating ovulation. CONCLUSION(S) These longitudinal data support the hypothesis that menstrual cycling in females with 21-hydroxylase deficiency can be prevented or disturbed by elevated progesterone levels of adrenal origin, in the absence of androgen excess. Increasing glucocorticoid dose could suppress adrenal progesterone production, resulting in menarche.


Journal of Medical Internet Research | 2015

The Contribution of Online Peer-to-Peer Communication Among Patients With Adrenal Disease to Patient-Centered Care

Dirkjan Kauw; Han Repping-Wuts; Alida Noordzij; Nike M. M. L. Stikkelbroeck; A.R.M.M. Hermus; Marjan J. Faber

Background Addison’s disease and Cushing’s syndrome are rare. The Dutch Adrenal Society offers an online forum for Dutch adrenal patients to meet and communicate. However, little is known about the added value such a forum has for the delivery of patient-centered care. Objective Our aim was to analyze the purposes of online patient-to-patient forum conversations, within the context of patient-centered care. Methods For this study a consecutive sample of 300 questions (“threads”) from the past 3.5 years was selected from the forum. The content of these patient-driven questions was analyzed based on the dimensions of patient-centeredness of the Picker Institute. This analysis was performed using ATLAS.ti. Results From the 390 questions analyzed, 80.8% (N=315) were intended to gain more information about the disease, the treatment, and to verify if other patients had similar complaints. To a much lesser extent (38/390, 9.7%), questions expressed a call for emotional support. Patients answered primarily by giving practical tips to fellow patients and to share their own experiences. Conclusions On an online patient forum for Cushing’s syndrome and Addison’s disease, patients appear to primarily gain knowledge and, to a lesser extent, emotional support from their peers. This experience-based knowledge has become a very important information source. As such, patients can make a substantial contribution to the creation of patient-centered care if this knowledge is integrated into the care provided by health care professionals.


The Journal of Clinical Endocrinology and Metabolism | 2016

Bilateral testicular tumors resulting in recurrent Cushing’s syndrome after bilateral adrenalectomy”

Troy H. Puar; Manon Engels; Antonius E. van Herwaarden; Fred C.G.J. Sweep; Christina A. Hulsbergen-van de Kaa; Karin Kamphuis-van Ulzen; Vasileios Chortis; Wiebke Arlt; Nike M. M. L. Stikkelbroeck; Hedi L. Claahsen-van der Grinten; A.R.M.M. Hermus

Context: Recurrence of hypercortisolism in patients after bilateral adrenalectomy for Cushing disease is extremely rare. Patient: We present a 27-year-old man who previously underwent bilateral adrenalectomy for Cushing disease with complete clinical resolution. Cushingoid features recurred 12 years later, with bilateral testicular enlargement. Hormonal tests confirmed adrenocorticotropic hormone (ACTH)-dependent Cushing disease. Surgical resection of the testicular tumors led to clinical and biochemical remission. Design and Results: Gene expression analysis of the tumor tissue by quantitative polymerase chain reaction showed high expression of all key steroidogenic enzymes. Adrenocortical-specific genes were 5.1 × 105 (CYP11B1), 1.8 × 102 (CYP11B2), and 6.3 × 104 (MC2R) times higher than nonsteroidogenic fibroblast control. This correlated with urine steroid metabolome profiling showing 2 fivefold increases in the excretion of the metabolites of 11-deoxycortisol, 21-deoxycortisol, and total glucocorticoids. Leydig-specific genes were 4.3 × 101 (LHCGR) and 9.3 × 100 (HSD17B3) times higher than control, and urinary steroid profiling showed twofold increased excretion of the major androgen metabolites androsterone and etiocholanolone. These distinctly increased steroid metabolites were suppressed by dexamethasone but unresponsive to human chorionic gonadotropin stimulation, supporting the role of ACTH, but not luteinizing hormone, in regulating tumor-specific steroid excess. Conclusion: We report bilateral testicular tumors occurring in a patient with recurrent Cushing disease 12 years after bilateral adrenalectomy. Using mRNA expression analysis and steroid metabolome profiling, the tumors demonstrated both adrenocortical and gonadal steroidogenic properties, similar to testicular adrenal rest tumors found in patients with congenital adrenal hyperplasia, suggesting the presence of pluripotent cells even in patients without congenital adrenal hyperplasia.


The Journal of Clinical Endocrinology and Metabolism | 2001

High Prevalence of Testicular Adrenal Rest Tumors, Impaired Spermatogenesis, and Leydig Cell Failure in Adolescent and Adult Males with Congenital Adrenal Hyperplasia

Nike M. M. L. Stikkelbroeck; Barto J. Otten; Arifa Pasic; Gerrit J. Jager; C. G. J. Fred Sweep; Kees Noordam; A.R.M.M. Hermus


The Journal of Clinical Endocrinology and Metabolism | 2003

CYP21 Gene Mutation Analysis in 198 Patients with 21-Hydroxylase Deficiency in The Netherlands: Six Novel Mutations and a Specific Cluster of Four Mutations

Nike M. M. L. Stikkelbroeck; Lies H. Hoefsloot; Ilse J. de Wijs; Barto J. Otten; A.R.M.M. Hermus; Erik A. Sistermans

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A.R.M.M. Hermus

Radboud University Nijmegen

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Barto J. Otten

Radboud University Nijmegen Medical Centre

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Didi D.M. Braat

Radboud University Nijmegen

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Alida Noordzij

Radboud University Nijmegen Medical Centre

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Fred C.G.J. Sweep

Radboud University Nijmegen

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H. Repping-Wuts

Radboud University Nijmegen Medical Centre

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Henri Timmers

Radboud University Nijmegen

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Manon Engels

Boston Children's Hospital

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Angelique Huijbers

Radboud University Nijmegen Medical Centre

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