A young child with CRUS and trouble using the hand in daily tasks took part in a short, intensive hand‑therapy program. After therapy, tests showed better hand strength, coordination, and ease with activities like dressing and play. The report shows that focused hand therapy can improve function in CRUS even without surgery.
A 4‑year‑old girl with bilateral CRUS was described, with limited forearm rotation but enough shoulder and wrist motion to manage most daily tasks. The report links the deformity to a timing error in early limb development and reviews how the bones normally separate before birth. Because function was acceptable, treatment was observation and follow‑up rather than surgery, showing that some children with CRUS can be managed without an operation.
A newborn with very low platelets had bilateral radio‑ulnar synostosis and bent little fingers, and later work linked this pattern to mutations in the HOXA11 gene in similar patients. The report discusses how the same syndrome combines bone changes in the forearm with failure of megakaryocytes, causing severe thrombocytopenia. Management focused on treating the blood problem (including transfusions and monitoring) while the synostosis itself was observed rather than operated on in the neonatal period.
A baby with unilateral CRUS was not clearly diagnosed before birth, even though careful review of pregnancy ultrasounds later showed subtle elbow and forearm changes. The report explains which prenatal ultrasound and postnatal X‑ray signs can suggest CRUS and how easily the diagnosis can be missed. The authors recommend closer follow‑up and better imaging protocols when a fetus shows persistent abnormal forearm position, so families can receive earlier counseling and planning.
An African American child with radioulnar synostosis and low platelets (thrombocytopenia) was found to have a MECOM gene variant. The case supports that MECOM‑related disease can combine forearm bone fusion with serious blood problems, fitting into the RUSAT spectrum. Management focused on monitoring and treating the blood disorder rather than operating on the synostosis.
In 329 children with CRUS, most had Type III changes on X‑ray, and this group almost always showed severe fixed pronation over 60°. The newer CMPOS system matched X‑ray types to clinical severity: Type I mainly had neutral or mild pronation, Type II moderate pronation, and Type III severe pronation. The study suggests that children with Type III in either system are more likely to need early intervention, while many with milder types can be managed with observation or physiotherapy.
Families with radioulnar synostosis plus serious blood problems were found to carry germline MECOM variants affecting the EVI1 protein, defining a syndrome called RUS with hematologic disease (RUSHD). The same MECOM change could cause very different marrow problems, from mild single low blood counts to severe bone marrow failure needing transplant, and onset ranged from infancy to adulthood. Management focused on monitoring and treating the marrow failure (often with bone marrow transplant), while the forearm fusion itself was not always operated on.
A 35‑year‑old carpenter with no history of trauma or surgery developed proximal radioulnar synostosis that completely blocked forearm rotation. Surgeons removed the bony bridge through combined posterior and anterior approaches and placed bone wax plus fascia between the bones, then started aggressive physiotherapy from day 2. At 2‑year follow‑up, the patient had painless, useful supination and pronation for work, with no sign of the bridge coming back.
People with SMAD6 gene changes often had RUS, sometimes with other bone differences in the skull or spine. SMAD6 loss‑of‑function variants were much more common in people with RUS than in healthy controls, showing this gene is a major cause of the condition. Many affected people had stable bone changes without life‑threatening illness, so care usually focused on watching growth and function rather than routine surgery.
Twenty patients with unilateral proximal CRUS and no surgery had wrist motion measured using a 3‑D motion analysis system. In patients older than 10 years, the affected side showed greater wrist rotation, especially more pronation, than the normal side, showing a clear compensatory hypermobility pattern. The 3‑D method closely matched goniometer readings and showed excellent reliability for measuring wrist rotation.
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