July 2026 Research Update

This month, prenatal reports reinforced a simple point: Kabuki syndrome can be hard to recognize by ultrasound alone, but genetic testing during pregnancy can identify a KMT2D change that explains the overall picture. Across these cases, the prenatal findings involved more than one organ system and did not point clearly to Kabuki syndrome until exome sequencing was done. This matters because it clarifies why some families only get a specific answer when broader genetic testing is used. [1] [2]

In one pregnancy, prenatal imaging showed kidney fusion, a bright-appearing bowel, and too much amniotic fluid, and exome sequencing found a new (de novo) disease-causing KMT2D variant. After birth, the baby was found to have Hirschsprung disease (a bowel condition caused by missing nerve cells in part of the intestine) and needed major bowel surgery, with developmental and behavior concerns noted by 24 months. In this report, the authors also highlighted that prenatal diagnosis of Hirschsprung disease is difficult and that a bright-appearing bowel is not specific to one condition. [1]

In another pregnancy with multiple fetal abnormalities, whole-exome sequencing identified Kabuki syndrome type 1 from a novel KMT2D frameshift variant, and also identified a separate condition, primary carnitine deficiency, due to an SLC22A5 mutation. This pairing is a reminder that more than one genetic diagnosis can be present in the same fetus, which can affect how the full set of findings is explained. The report emphasized that standard chromosome testing may miss Kabuki syndrome-related variants when the ultrasound picture is broad but not specific. [2]

For families who have experienced complex prenatal ultrasounds, these reports add context for why Kabuki syndrome may not be obvious before birth and why a more detailed genetic test sometimes provides the clearest answer. The main practical message is about understanding the diagnostic pathway rather than changing care: ultrasound signs like kidney differences or bowel findings can occur for many reasons, so genetics may be needed to confirm Kabuki syndrome. These are single-case reports, so they do not tell how often these specific prenatal findings or added diagnoses occur, but they help clarify what prenatal Kabuki syndrome can look like in real life. [1] [2]

This month included a case focused on dental and facial differences, showing how Kabuki syndrome can appear in everyday settings like a dental visit. The report described extensive changes in tooth development and bite alignment alongside recognizable facial features. For patients and caregivers, this adds a clearer picture of the range and severity that mouth and tooth differences can sometimes reach in Kabuki syndrome. [3]

In a 15-year-old girl described as having Kabuki syndrome, the dental findings included an anterior open bite, retained baby teeth, and missing or impacted permanent teeth on panoramic imaging. The authors stated that orodental anomalies are common in Kabuki syndrome and may act as an early clue that prompts referral for genetic evaluation, though this specific patient did not have documented molecular confirmation in the report. [3]

For families, this report mainly adds understanding of what Kabuki syndrome-related dental differences can look like and why they may be raised as part of the diagnostic story. It does not show how common these specific findings are, and it cannot show cause and effect because it is one patient and genetic confirmation was not included. Still, it may help patients feel less surprised if tooth development, spacing, or bite problems become part of the Kabuki syndrome experience and are discussed during dental care. [3]