Clinical guidelines for the diagnosis and treatment of 21-hydroxylase deficiency (2021 revision)

Anthropometric Measures Among Children and Teens With Classic 46,XX Congenital Adrenal Hyperplasia in Relation to Improvements in Diagnosis and Care

OBJECTIVES

To examine anthropometric changes of patients with classic 46,XX congenital adrenal hyperplasia (CAH) and matched referents; and 2) To investigate the impact of improvements in diagnosis and care on growth patterns in these patients by comparing changes in anthropometric parameters before and after CAH consensus guidelines.

METHODS

This was a retrospective cohort study nested within 3 large integrated health-systems. Seventy-six patients with classic 46XX CAH and 1102 matched referents <21 years of age were identified. Anthropometric measurements including age-specific percentiles for height, weight, and body mass index were examined and compared between groups using linear mixed-effect models. Anthropometric trajectories were explored using latent class analyses.

RESULTS

CAH patients had lower height percentiles than referents at all time points. Differences ranged from 10.7% to 28.4%. After age 5, differences in height were only significant among study participants born before the publication of CAH consensus guidelines. Latent class analyses of height detected a "gradual growth increase" pattern in 28% of CAH cases and only 4% of referents, and a "growth stunting" pattern was observed in 13% of CAH cases and 6% of referents. Height percentile measures did not differ in CAH patients with or without evidence of hormonal interventions (growth hormone and/or puberty blockers) used to increase adult height.

CONCLUSIONS

There is substantial heterogeneity in growth trajectories of CAH patients. Although stunting may affect CAH patients, advances in diagnosis and care improved anthropometric outcomes in this population. Understanding the disease- and therapy-related mechanisms that explain the different growth patterns requires additional research.

Biochemical monitoring of 21-hydroxylase deficiency: a clinical utility of overnight fasting urine pregnanetriol

PURPOSE OF REVIEW

21-Hydroxylase deficiency (21-OHD), the most common form of congenital adrenal hyperplasia, is an autosomal recessive disorder caused by pathogenic variants in CYP21A2 . Although this disorder has been known for several decades, many challenges related to its monitoring and treatment remain to be addressed. The present review is written to describe an overview of biochemical monitoring of this entity, with particular focus on overnight fasting urine pregnanetriol.

RECENT FINDINGS

We have conducted a decade-long research project to investigate methods of monitoring 21-OHD in children. Our latest studies on this topic have recently been published. One is a review of methods for monitoring 21-OHD. The other was to demonstrate that measuring the first morning PT level may be more practical and useful for biochemical monitoring of 21-OHD. The first morning pregnanetriol (PT), which was previously reported to reflect a long-term auxological data during the prepubertal period, correlated more significantly than the other timing PT in this study, with 17-OHP, before the morning medication.

SUMMARY

In conclusion, although the optimal method of monitoring this disease is still uncertain, the use of overnight fasting urine pregnanetriol (P3) as a marker of 21-OHD is scientifically sound and may be clinically practical.

A MinION-based Long-Read Sequencing Application With One-Step PCR for the Genetic Diagnosis of 21-Hydroxylase Deficiency

CONTEXT

Recently developed long-read sequencing (LRS) technology has been considered an option for CYP21A2 analysis. However, the clinical use of LRS for CYP21A2 analysis is limited.

OBJECTIVE

This study's objective is to develop an efficient and low-cost LRS system for CYP21A2 screening.

METHODS

A DNA fragment library was prepared in a single polymerase chain reaction (PCR) that covers the entire CYP21A2 gene and all known junctions caused by TNXB gene structural rearrangements, yielding a single 8-kb product of CYP21A2 or CYP21A1P/CYP21A2 chimera. After barcoding, the PCR products were sequenced on a MinION-based platform with Flongle Flow Cell R9.4.1 and R10.4.1.

RESULTS

The reference genotypes of 55 patients with 21-hydroxylase deficiency (21OHD) were established using the conventional method with multiplex ligation-dependent probe amplification (MLPA) and nested PCR. LRS using Flongle Flow Cell R9.4.1 yielded consistent results. Additionally, the recently updated LRS "duplex" analysis with Flongle flow cell R10.4.1 was tested to reveal an advantage of accurately sequencing a variant located on the homopolymer region. By introducing a barcode system, the cost was reduced to be comparable to that of conventional analysis. A novel single-nucleotide variation was discovered at the acceptor site of intron 7, c.940-1G > C. We also identified a subtype of the classical chimeric junction CH2, "CH2a," in the region from the latter part of intron 5 to exon 6.

CONCLUSION

We successfully established a novel low-cost and highly accurate LRS system for 21OHD genetic analysis. Our study provides insight into the feasibility of LRS for diagnosing 21OHD and other genetic diseases caused by structural rearrangements.

Acute Adrenal Insufficiency Caused by Mental Stress in a Patient With Adrenocorticotropic Hormone Deficiency

In patients with chronic adrenal insufficiency, physical stress increases the requirement for glucocorticoid therapy. Although mental stress may cause acute adrenal insufficiency, it is debatable how patients should be treated when experiencing mental stress. Here, we report the case of a female patient with septo-optic dysplasia who had been treated for adrenocorticotropic hormone deficiency since infancy. After her grandfather died when she was 17 years old, she complained of nausea and stomach pain. Her symptoms failed to improve despite treatment with stress doses of oral hydrocortisone and self-administered glucagon injection. Her general condition improved after she began receiving continuous hydrocortisone and glucose infusions. Glucocorticoid stress doses should be given early if a patient is likely to experience mental stress.

Dosage of hydrocortisone during late infancy is positively associated with changes in body mass index during early childhood in patients with 21-hydroxylase deficiency

Obesity is a major complication in children with 21-hydroxylase deficiency (21-OHD). There is evidence to show that higher body mass index (BMI) during infancy and early childhood is associated with an increased risk for the subsequent development of obesity in the general population; however, limited information is currently available on this issue in 21-OHD patients. Additionally, despite the frequent use of supraphysiological dosages of hydrocortisone in 21-OHD, the association between BMI and hydrocortisone dosage during these periods remains largely unclear; therefore, we retrospectively investigated BMI at approximately 1 and 3 years old and its association with hydrocortisone dosage in 56 children with 21-OHD. The median BMI-standard deviation score (SDS) was 0.28 (Interquartile range [IQR]: -0.53 to 1.09) and 0.39 (IQR: -0.44 to 1.14) at approximately 1 and 3 years old, respectively, and no association was observed between hydrocortisone dosage and BMI-SDS at either time-point; however, multivariate analysis revealed that hydrocortisone dosage at approximately 1 year old was positively associated with changes in BMI (β = 0.57, p = 0.013) and BMI-SDS (β = 0.59, p = 0.011) between approximately 1 and 3 years old after adjustment for age, sex, and changes in hydrocortisone dosage during the same period. The average dosage of hydrocortisone between approximately 6 months and 1 year old also showed similar results. These results indicate that a higher dosage of hydrocortisone during late infancy is associated with a higher BMI at approximately 3 years old, which may lead to the development of obesity later in life in children with 21-OHD.

From New Endocrine Entities Requiring New Approaches to New Approaches Leading to New Endocrine Entities

The dynamics pace of modern society is reflected by the medical community, the public health concerns, the quality of life, as well as the specific spectrum of various disorders [...].

A Male Subject with Congenital Adrenal Hyperplasia due to 21-Hydroxylase Deficiency Which Was Diagnosed at 31 Years Old due to Infertility

INTRODUCTION

Congenital adrenal hyperplasia is caused by deficiencies in a number of enzymes involved in hormone biosynthesis in the adrenal glands or sexual glands. Adrenocorticotropic hormone (ACTH) secretion is enhanced by decreased cortisol production, leading to adrenal hyperplasia. The frequency of 21-hydroxylase deficiency (21-OHD) was the highest among congenital hyperplasias, and in 1989 it became one of the target diseases for newborn screening in Japan.

CASE PRESENTATION

A 31-year-old Japanese male visited our institution due to infertility. On admission, his height was 151.7 cm (average ± SD in the same age, sex and population: 172.1 ± 6.1 cm). It was noted that his height had not changed since he was ten years old, and that pubic hair was observed when he was 7 years old. He had azoospermia and his gonadotropin level was low. He had low levels of both luteinizing hormone (LH) and follicle-stimulating hormone (FSH) but high levels of free testosterone. He had a low cortisol level and high ACTH level. Abdominal computed tomography (CT) showed swelling of bilateral adrenal glands, although morphology was normal. Based on these findings, he was diagnosed with primary adrenal insufficiency and admitted to our institution. His height had not changed since he was ten years old. In addition, pubic hair was observed when he was 7 years old. His sexual desire was decreased, although he had no general malaise or fatigue. He did not have pigmentation of the skin, genital atrophy or defluxion of pubic hair, although his body hair was relatively thin. In endocrinology markers, ACTH level was high (172.2 pg/mL) (reference range: 7.2-63.3 pg/mL), although his cortisol level was 6.9 μg/dL (4.5-21.1 μg/dL). These data suggest that he suffered from primary adrenal insufficiency. LH and FSH levels were both low, but free testosterone and estradiol levels were high. These data excluded the possibility of central hypogonadism. Furthermore, the level of 17a-hydroxyprogesterone, a substrate of 21-hydroxylase, and the level of pregnanetriol, a metabolite of progesterone in urine, were both markedly high. Based on these findings, we ultimately diagnosed this patient with 21-hydroxylase deficiency.

CONCLUSIONS

We experienced a case of congenital adrenal hyperplasia due to 21-hydroxylase deficiency which was diagnosed in a 31-year-old male with infertility. Therefore, the possibility of 21-hydroxylase deficiency should be borne in mind in subjects with infertility who were born before 1989 and who had not undergone newborn screening for this disease.

Monitoring treatment in pediatric patients with 21-hydroxylase deficiency

21-hydroxylase deficiency (21-OHD) is the most common form of congenital adrenal hyperplasia. In most developed countries, newborn screening enables diagnosis of 21-OHD in asymptomatic patients during the neonatal period. In addition, recent advances in genetic testing have facilitated diagnosing 21-OHD, particularly in patients with equivocal clinical information. On the other hand, many challenges related to treatment remain. The goals of glucocorticoid therapy for childhood 21-OHD are to maintain growth and maturation as in healthy children by compensating for cortisol deficiency and suppressing excess adrenal androgen production. It is not easy to calibrate the glucocorticoid dosage accurately for patients with 21-OHD. Auxological data, such as height, body weight, and bone age, are considered the gold standard for monitoring of 21-OHD, particularly in prepuberty. However, these data require months to a year to evaluate. Theoretically, biochemical monitoring using steroid metabolites allows a much shorter monitoring period (hours to days). However, there are many unsolved problems in the clinical setting. For example, many steroid metabolites are affected by the circadian rhythm and timing of medication. There is still a paucity of evidence for the utility of biochemical monitoring. In the present review, we have attempted to clarify the knowns and unknowns about treatment parameters in 21-OHD during childhood.

Toward Improving the Transition of Patients With Congenital Adrenal Hyperplasia From Pediatrics to Adult Healthcare in Japan

The transition of patients with childhood-onset chronic diseases from pediatric to adult healthcare systems has recently received significant attention. Since 2013, the Japan Pediatric Society developed working groups to formulate guidelines for transition of patients with childhood-onset chronic diseases from pediatric to their disease specialty. Herein, we report on the activities of the Japan Society of Pediatric Endocrinology (JSPE) and the current status of transition medicine for 21-hydroxylase deficiency (21-OHD) in Japan. The JSPE proposed roadmaps and checklists for transition and prepared surveys on the current status of healthcare transition for childhood-onset endocrine diseases. In Japan, newborn screening for 21-OHD started in January 1989; however, there is no nationwide registry-based longitudinal cohort study on 21-OHD from birth to adult. The current status and the whole picture of healthcare and health problems in adult patients with 21-OHD remain unclear. Thus, we conducted a questionnaire survey on JSPE members to clarify the current status of healthcare transition of 21-OHD and discuss future perspectives for the healthcare transition of patients with 21-OHD in Japan.