July 2026 Research Update

This month added a clearer picture of what pancreas surgery can and cannot achieve in congenital hyperinsulinism (CHI). Across studies, surgeons reported new ways to better see and protect the bile duct during minimally invasive operations, while patient-reported follow-up after large pancreas removals showed that long-term blood sugar swings and digestive issues remain common for many families. Taken together, these studies describe progress in surgical technique, but also reinforce that surgery (especially for diffuse CHI) can lead to long-lasting health management needs. [1] [2] [3]

Two pediatric surgical case series reported that indocyanine green (a dye that glows under near-infrared light) helped surgeons continuously visualize the intrapancreatic common bile duct during laparoscopic operations. In 5 infants having near-total pancreatectomy for diffuse CHI, the bile duct was seen in all cases and there were no bile duct injuries, although some children still had residual hyperinsulinism later. In 7 children having a duodenum-preserving pancreatic head operation for focal CHI, the workflow was completed in every case and no biliary complications were reported. [1] [2]

Longer-term outcomes after extensive surgery for diffuse CHI looked mixed rather than curative in registry participants. In 34 people who had at least 75% of the pancreas removed, many were later living with diabetes, exocrine pancreatic insufficiency (trouble digesting food because the pancreas makes fewer enzymes), or ongoing need for low-blood-sugar medicines, and continuous glucose monitor data showed blood sugars often stayed outside the desired range. Interviews also described caregiver stress, prolonged hospitalizations, and ongoing lifestyle impact even years after surgery. [3]

Experience from a low-resource setting highlighted how limited testing options can shape surgical pathways and outcomes. In a Sudan single-center report of 32 infants, near-total pancreatectomy was used in nearly all cases, with diffuse disease most common on tissue review and frequent early post-operative low blood sugars. The authors also reported deaths during follow-up, including some due to recurrent hypoglycemia, emphasizing the importance of long-term follow-up data when surgery is used as the main option. [4]

For patients and caregivers, these studies mainly add understanding rather than changing what is routinely done right now. The surgical imaging reports are early, small studies, but they show a practical way surgeons may reduce bile duct injury risk during complex pancreas operations. The registry follow-up after large pancreas removals helps set realistic expectations that diffuse-CHI surgery may reduce dangerous hypoglycemia but can bring new long-term needs like diabetes care, digestion support, and continued glucose monitoring. What remains uncertain is how much these newer imaging steps improve long-term outcomes compared with standard surgery, because larger comparative studies were not reported this month. [1] [2] [3] [4]

This month strengthened the bigger picture that CHI is often genetic, often starts in the newborn period, and can have important long-term effects beyond low blood sugar alone. One regional study and one global registry study both described frequent impacts on daily life, including seizures at presentation for some children and developmental or neurological challenges later for many. A separate cohort focused on thrombosis (blood clots) as a complication in persistent disease and reported a high clot rate in their center, especially alongside recurrent hypoglycemia and catheter issues. [5] [6] [7]

A Western Australia population-based report found that most children presented in the neonatal period and a genetic cause was identified in about two-thirds, most often involving ABCC8 or KCNJ11. Most children in that cohort responded to medical therapy, while a smaller group needed surgery, including focal-lesion cases described as curative. The same report noted that continuous glucose monitoring was used by most patients and that diabetes after pancreatectomy occurred in some. [5]

In the HI Global Registry, family-reported data suggested neurodevelopmental challenges are common among people living with CHI. Among participants aged 5 years and older, many reported developmental delays or diagnosed neurological, sensory, or mental health conditions, and about half with adverse outcomes reported peer-level daily functioning. This helps clarify that long-term supports may matter even when hypoglycemia is being managed. [6]

A 20-child cohort focusing on thrombosis reported blood clots in nearly half of patients with persistent CHI, including both catheter-related clots and clots not linked to a catheter. Recurrent hypoglycemia episodes were more frequent in the group that developed thrombosis, while the specific genetic mutation type did not separate those with and without clots in this small dataset. In the treated cases, enoxaparin was reported to resolve thrombosis without complications. [7]

One international cohort described a specific genetic condition (HNF4A arginine 85 variants) where neonatal hyperinsulinism can occur alongside kidney tubule disease that progresses over time and may later include diabetes in adulthood. This does not describe most CHI, but it adds detail for families affected by this particular gene change that CHI may be only one part of a broader health picture involving kidneys, and sometimes liver or heart findings. [8]

For many families, these studies help put personal experiences into context: CHI often has a genetic cause, commonly begins very early in life, and can have long-term developmental and health impacts in some people. The registry results and the thrombosis report do not prove what causes these outcomes, but they make clearer which issues are being reported in real-world settings and may matter over time. This evidence may matter now for awareness and planning conversations, and it may matter later as researchers test how to reduce risks like developmental impacts or blood clots. What remains uncertain is how much these rates vary by CHI subtype, access to specialist care, and differences between countries and centers, since the studies used different populations and data sources. [5] [6] [7] [8]

This month’s case reports expanded the day-to-day situations where CHI can matter, rather than changing the overall understanding of typical CHI. One report described intermittent hyperinsulinemic hypoglycemia in a school-aged child linked to a newly identified KCNJ11 gene change, showing that CHI-related low blood sugar can sometimes be recognized beyond infancy. Another report focused on safe planning for dental treatment under general anesthesia in a young child with CHI, emphasizing careful coordination and glucose checks around fasting. [9] [10]

In the school-aged child report, genetic testing identified a novel KCNJ11 nonsense variant, and hypoglycemia was described as intermittent and not reproduced during a prolonged fasting test. The authors noted important missing information, such as lack of a critical blood sample during a low-glucose episode and no parent testing, which limits how widely the finding can be applied. Even so, the case adds an example of how genetics can sometimes clarify unexplained hypoglycemia patterns later in childhood. [9]

In the dental anesthesia report, a 3-year-old with CHI underwent full-mouth dental rehabilitation with multidisciplinary planning and frequent glucose monitoring during the procedure. Blood glucose stayed within the reported target range during surgery and recovery was uneventful, with discharge the next day. The main value of this report is practical: it illustrates that procedures involving fasting can be managed safely in at least one child when planning and monitoring are prioritized. [10]

For patients and caregivers, these single-patient reports are early evidence and may not apply to everyone, but they help clarify real-world situations families face. They highlight that CHI care can intersect with school years and with common childhood needs like dental work that requires anesthesia and fasting. What remains uncertain is how often intermittent, later-recognized hyperinsulinemic hypoglycemia happens and which genetic changes predict it, because one case cannot answer frequency or risk. [9] [10]