Strømme syndrome is an extremely rare genetic disorder caused by mutations in the CENPF gene, and it primarily affects the intestines, brain, and eyes. First described in 1993 when two sisters presented shortly after birth with a distinctive combination of intestinal malformation, small head size, and eye abnormalities, the condition has since been genetically confirmed in fewer than 30 people worldwide.1PubMed Central. Stromme syndrome presenting with classic microcephaly and apple-peel intestinal atresia in a neonate: a genetically confirmed case report Because so few cases exist, much of what clinicians know comes from individual case reports, and the range of severity turns out to be surprisingly wide.
The Defining Triad
Strømme syndrome is classically recognized by three features appearing together: a specific type of intestinal blockage called apple-peel intestinal atresia, an unusually small head (microcephaly), and abnormalities of the front chamber of the eye.2PubMed. Jejunal atresia and anterior chamber anomalies: Further delineation of the Strømme syndrome This triad is the hallmark that historically set the syndrome apart from other congenital conditions. Not every affected person has all three, though. Some present with only one or two of these features, while others also have heart, kidney, or genital abnormalities that broaden the clinical picture well beyond the original three-part description.3PubMed. Strømme Syndrome
Apple-Peel Intestinal Atresia
The intestinal problem in Strømme syndrome is often the first thing doctors notice because it demands immediate attention. In apple-peel atresia, a section of the small intestine is missing or closed off, and the remaining bowel wraps around a thin blood vessel in a spiral pattern that looks like the peel of an apple. The blockage usually sits in the duodenum or jejunum, the upper portions of the small intestine. In one genetically confirmed case, surgeons performing an exploratory operation on a two-day-old infant found both duodenal and jejunal atresia in the classic apple-peel configuration, along with an underdeveloped artery supplying the gut.4PubMed Central. Stromme syndrome presenting with classic microcephaly and apple-peel intestinal atresia in a neonate: a genetically confirmed case report – Section: CASE PRESENTATION
This type of atresia is not exclusive to Strømme syndrome. It occurs in other settings too, sometimes as an isolated birth defect. What raises suspicion for Strømme syndrome specifically is when the intestinal blockage shows up alongside the other features of the triad, particularly microcephaly and eye anomalies. When a newborn has apple-peel atresia and a head circumference well below average, genetic testing for CENPF mutations becomes an important diagnostic step.
Regardless of the underlying syndrome, apple-peel atresia requires surgery in the first days of life. Surgeons reconnect the healthy sections of bowel, but outcomes depend on how much functional intestine remains and how well blood supply to the gut has developed. Infants with Strømme syndrome who survive this initial surgery then face the longer-term management of the syndrome’s other features.
Microcephaly and Brain Development
Microcephaly in Strømme syndrome is usually apparent at birth or even on prenatal ultrasound. One reported case involved a three-month-old girl whose small head size had been detected before she was born.5PubMed. A further family of Stromme syndrome carrying CENPF mutation The degree of microcephaly varies. Some children have head circumferences that are mildly below average, while others have significantly reduced brain volume with structural brain abnormalities visible on imaging.
Developmental delay and intellectual disability are common consequences. The GeneReviews entry on Strømme syndrome lists developmental delay or intellectual disability as a primary feature alongside the physical malformations.3PubMed. Strømme Syndrome In practice, this means children with the syndrome often reach motor milestones like sitting, crawling, and walking later than typical, and they may need speech therapy and specialized educational support. How much cognitive ability is affected varies widely from person to person, consistent with the overall pattern of this syndrome producing a broad spectrum of severity.
Structural brain abnormalities beyond simple smallness have been noted in some cases, though the published literature is too thin to say how common any particular brain malformation is. The underlying mechanism links back to the role the CENPF gene plays in cell division and in the function of cilia, tiny hair-like structures that help guide brain development during fetal life.
Eye Abnormalities
The eye problems in Strømme syndrome center on the anterior chamber, the fluid-filled space between the cornea and the iris. The most frequently reported abnormality is sclerocornea or corneal leukoma, where the normally clear cornea becomes opaque and white, severely limiting vision.2PubMed. Jejunal atresia and anterior chamber anomalies: Further delineation of the Strømme syndrome Microphthalmia, an abnormally small eye, has also been reported. In one case, a six-year-old boy had microphthalmia on one side only.6European Journal of Medical Genetics. Expanding the phenotype and the genotype of Stromme syndrome: A novel variant of the CENPF gene and literature review
The range of eye involvement is broad. Some individuals have bilateral corneal opacities that cause significant visual impairment from birth, while others have milder findings that may only be detected on a detailed ophthalmologic exam. Because anterior chamber abnormalities can raise intraocular pressure and lead to glaucoma, regular eye monitoring is part of ongoing care. For children whose corneal opacities are severe, corneal transplantation may be considered, though the small eye size and structural differences can make surgery more complex than in typical corneal transplant candidates.
Heart, Kidney, and Genitourinary Involvement
Beyond the classic triad, Strømme syndrome can affect the heart, kidneys, and genital or urinary structures. Cardiac anomalies and genitourinary anomalies are both listed among the primary features.3PubMed. Strømme Syndrome The specific types of heart defects reported vary, and with fewer than 30 confirmed cases to draw from, no single cardiac malformation stands out as the signature of the syndrome.
Kidney involvement is particularly worth noting because it can be a source of long-term health problems even after the more dramatic neonatal issues have been addressed. One published case followed a young man from birth through adolescence who had undergone surgery for apple-peel atresia as a newborn and was later found to have renal complications requiring ongoing nephrology care.7Clinical Kidney Journal. Renal involvement and Strømme syndrome This case highlighted that even when the initial surgical crisis is resolved, kidney function needs to be monitored over time. Genitourinary anomalies can include malformations of the reproductive organs or urinary tract, adding to the constellation of structures affected by disrupted fetal development.
What Causes Strømme Syndrome
Strømme syndrome is caused by mutations in the CENPF gene, which provides instructions for making a protein called centromere protein F. This protein is involved in cell division, specifically in the process of separating chromosomes accurately when cells split. The link between CENPF and Strømme syndrome was established in 2016 when researchers used whole-exome sequencing on two unrelated pairs of siblings with the condition. Both families carried compound heterozygous mutations, meaning each affected child had inherited a different faulty copy of CENPF from each parent. The mutations were truncating, which means they cut the protein short so it could not function properly.8PubMed. Strømme Syndrome Is a Ciliary Disorder Caused by Mutations in CENPF
That same research established Strømme syndrome as a ciliopathy, a disorder of cilia. Cilia are microscopic, finger-like projections on the surface of cells that perform signaling and structural roles during embryonic development. They help organize the development of the brain, eyes, intestines, heart, and kidneys, which is why a defect in a gene involved in ciliary function can produce problems across such a wide array of organ systems. When CENPF is not working, the cilia do not form or function correctly, and the cascading effect disrupts the normal patterning of multiple organs during fetal growth.
The ciliopathy connection also helps explain why Strømme syndrome shares features with other ciliary disorders. Conditions like Joubert syndrome, Bardet-Biedl syndrome, and Meckel-Gruber syndrome also involve cilia dysfunction and can affect the brain, eyes, kidneys, and other organs. The overlap can make clinical diagnosis tricky before genetic testing confirms the specific gene involved.
Inheritance and Carrier Risk
Strømme syndrome follows an autosomal recessive inheritance pattern. A child needs to inherit a defective copy of CENPF from both parents to develop the condition. When both parents are carriers, each pregnancy carries a one-in-four chance of producing an affected child, a one-in-two chance of producing a carrier who is unaffected, and a one-in-four chance of producing a child who is neither affected nor a carrier.9PubMed. Strømme Syndrome – Section: GENETIC COUNSELING
Carriers have one working copy of CENPF, which is enough for normal development, so they have no symptoms. The families in the original genetic studies were not consanguineous, meaning the parents were not closely related to each other.8PubMed. Strømme Syndrome Is a Ciliary Disorder Caused by Mutations in CENPF This matters because it shows that carrier status is not limited to isolated or closely related populations. However, given that the syndrome is extraordinarily rare, the chance of two unrelated carriers meeting is extremely small. When a family has already had one affected child, genetic counseling becomes important for understanding the risk to future pregnancies and for identifying whether other family members are carriers.
How the Diagnosis Is Made
Before the CENPF gene was identified as the cause, diagnosis relied entirely on recognizing the clinical pattern of apple-peel atresia plus microcephaly plus eye anomalies. That approach was imprecise because each of those features can occur on its own or in other syndromes. Today, genetic testing confirms the diagnosis. Whole-exome sequencing or targeted gene panels that include CENPF can identify the two pathogenic variants needed for a diagnosis. The condition was originally described clinically in 1993 based on two affected sisters, but genetic confirmation through CENPF testing only became possible more than two decades later.8PubMed. Strømme Syndrome Is a Ciliary Disorder Caused by Mutations in CENPF
In practice, the diagnostic journey often starts in the neonatal intensive care unit. A baby presents with intestinal obstruction, undergoes surgery, and is found to have apple-peel atresia. If the baby also has a small head or obvious eye abnormalities, clinicians may suspect Strømme syndrome and order genetic testing. In some cases, the intestinal malformation and microcephaly are detected on prenatal imaging, prompting earlier evaluation. Because the syndrome is so rare and many clinicians will never encounter a case, there can be diagnostic delays, particularly when the presentation is incomplete or atypical.
Treatment and Ongoing Management
There is no cure for Strømme syndrome, and no treatment addresses the underlying genetic cause. Management is entirely symptom-based and involves multiple medical specialties working together over the course of a child’s life.
- Surgical repair: Apple-peel atresia requires emergency neonatal surgery to restore intestinal continuity. Follow-up monitoring for nutritional absorption and bowel function continues afterward, sometimes for years.
- Ophthalmology: Eye abnormalities need early assessment to determine the extent of visual impairment and to watch for complications like glaucoma. Interventions can range from corrective lenses to surgical procedures depending on the severity.
- Neurology and development: Children with microcephaly and developmental delay benefit from early intervention services including physical therapy, occupational therapy, and speech-language therapy. Educational support plans are typically needed as the child grows.
- Cardiology: If a heart defect is present, it may require surgical correction or ongoing monitoring depending on the type and severity.
- Nephrology: Given the reported cases of kidney involvement, periodic assessment of kidney function is advisable. Some individuals may develop problems that need specific treatment years after birth.7Clinical Kidney Journal. Renal involvement and Strømme syndrome
The coordination challenge is real. Families often find themselves shuttling between multiple specialists, each managing one piece of a complex puzzle. A pediatrician or geneticist who takes a coordinating role can help ensure that the various care threads do not become disconnected.
The Wide Spectrum of Severity
One of the most striking aspects of Strømme syndrome is how much the severity can differ from one person to the next. The clinical presentation ranges from mid-gestation lethality, where the fetus does not survive to birth, all the way to individuals whose only lasting issue is microcephaly with developmental delay and no intestinal or eye involvement at all.1PubMed Central. Stromme syndrome presenting with classic microcephaly and apple-peel intestinal atresia in a neonate: a genetically confirmed case report This range creates real difficulties for predicting outcomes. When a family receives a diagnosis, the medical team cannot easily forecast whether a child will need lifelong intensive support or will eventually function relatively independently with some accommodations.
The variability likely reflects differences in which specific CENPF mutations a person carries and how those mutations affect protein function. Two different truncating mutations that stop the protein at different points may leave different amounts of residual activity, leading to different severities. There may also be genetic modifiers, other genes that compensate partially for CENPF’s loss in some individuals but not others. With so few confirmed cases, researchers have not been able to draw firm lines between specific mutations and specific outcomes.
Why So Few Cases Are Known
Fewer than 30 genetically confirmed cases of Strømme syndrome have been published.1PubMed Central. Stromme syndrome presenting with classic microcephaly and apple-peel intestinal atresia in a neonate: a genetically confirmed case report That number almost certainly underestimates the true prevalence. Several factors probably contribute to undercounting. First, genetic testing for CENPF has only been available since 2016, so any cases before that era could only be diagnosed clinically and may have been classified under other conditions or simply labeled as “multiple congenital anomalies” without a syndrome-level diagnosis. Second, the mildest cases, those with microcephaly and developmental delay but no intestinal or eye problems, might never trigger suspicion for a rare syndrome. Third, the most severe cases that result in fetal loss may never receive a genetic workup.
As whole-exome and whole-genome sequencing become cheaper and more widely available in neonatal intensive care units, the number of diagnosed cases is expected to grow. Each new case adds to the knowledge base. Researchers compiling literature reviews of published cases have been steadily expanding the recognized phenotype, documenting features that were not part of the original 1993 description.6European Journal of Medical Genetics. Expanding the phenotype and the genotype of Stromme syndrome: A novel variant of the CENPF gene and literature review This ongoing expansion means that clinicians diagnosing a child today have a somewhat richer understanding of the condition’s range than those who encountered it even five years ago, though the rarity of the syndrome still leaves many questions unanswered.
Living with an Ultra-Rare Diagnosis
For families, an ultra-rare diagnosis like Strømme syndrome can feel isolating. There are no large patient registries, no dedicated treatment centers, and no established support groups in the way that more common genetic conditions have them. Much of the practical knowledge about managing the syndrome lives in individual case reports scattered across medical journals, which most families will never read. Genetic counselors and medical geneticists become crucial resources, not just for explaining recurrence risk but for helping families connect with whatever research community exists and for advocating within the medical system.
Children who survive the neonatal surgical period and whose heart and kidney function remain stable can have meaningful developmental trajectories, particularly with early and sustained therapeutic support. The young man described in the Clinical Kidney Journal case report was followed from birth through his late teens, demonstrating that long-term survival is possible and that medical management evolves as the child grows.7Clinical Kidney Journal. Renal involvement and Strømme syndrome His case also underscored that new complications can surface years after the initial problems are addressed, reinforcing the need for ongoing, multidisciplinary follow-up rather than a one-time fix.