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Pediatric Neurology

Daily Management and Emergency Care

At a Glance

Daily care for SLC35A2-CDG is individualized and may include monitoring liver and kidney health, blood counts, growth, vision, and feeding. Families should have a seizure rescue plan and seek emergency help for prolonged or repeated seizures, breathing problems, or failure to return to baseline.

Living with SLC35A2-CDG requires a shift from “waiting for problems” to “proactive monitoring.” Because there is no single established handbook for this ultra-rare condition, doctors often use general CDG guidelines to help track your child’s health over time [1].

Routine Health Monitoring

Even if your child appears to be doing well, regular “check-ins” with their biology are essential. Note that surveillance is highly individualized; not every child needs the exact same tests or ultrasound schedule. Your team will likely recommend the following baseline and ongoing screenings based on disease-specific evidence or extrapolated guidance:

  • Liver and Kidney Health: Since the liver and kidneys are the body’s primary metabolic factories, doctors will use blood tests (like ALT, AST, and creatinine) to ensure they are functioning correctly [1]. They may also use an ultrasound to look for any physical changes in the liver, such as steatosis (fatty liver), particularly when considering certain therapies [1].
  • Hematology (Blood Counts): Some children with this condition have been found to have anemia (low red blood cells), so a routine CBC (Complete Blood Count) is often part of an individualized monitoring plan [2].
  • Vision Check: Because the brain processes what the eyes see, many children have Cortical Visual Impairment (CVI). This means the eyes may be physically healthy, but the brain has trouble interpreting the images. A pediatric ophthalmologist should check for this, as well as strabismus (misaligned eyes) [3][4].
  • Growth and Nutrition: Children with this condition may experience failure to thrive or slow growth [5][6]. Monitoring their height, weight, and head circumference helps the team decide if extra nutritional support, like a feeding tube, is needed.

Managing Daily Challenges

The daily reality of SLC35A2-CDG involves managing the physical and emotional aspects of a chronic condition.

  • Feeding and Swallowing: Hypotonia (low muscle tone) often affects the muscles used for chewing and swallowing. You may notice your child coughing, gagging, or taking a very long time to eat [7]. Silent aspiration often cannot be identified reliably from observation alone. A clinical feeding assessment, such as a videofluoroscopic swallow study or FEES, is considered when clinically indicated to evaluate if your child is “aspirating” (accidentally breathing food or liquid into the lungs), which can lead to pneumonia [7].
  • Scan Anxiety: Waiting for the results of a new MRI or EEG can be incredibly stressful. Many parents find it helpful to focus on the child’s actual daily progress—like a new smile or better head control—rather than just the data on a screen.

Recognizing Medical Emergencies

In a child with Developmental and Epileptic Encephalopathy (DEE), “seizures” may be a daily occurrence. However, it is vital to know when a seizure shifts from a routine event to a life-threatening emergency, and families must be trained in basic seizure first aid.

Basic Seizure First Aid:

  • Time the event.
  • Protect the child from injury.
  • Do NOT restrain the child or put anything in their mouth.
  • Place the child in a recovery position (on their side) when safe.
  • Do NOT give oral medication or food while unalert.
  • Use prescribed rescue medication exactly as directed.

What is NOT usually an emergency:

  • A brief seizure that follows your child’s “typical” known pattern, ends on its own quickly, and allows a return to baseline.
  • The “post-ictal” period, where your child may be very sleepy or quiet for a while after a routine seizure ends.

What IS an Emergency (Call Emergency Services):

  • Status Epilepticus: Any convulsive seizure (shaking/jerking) that lasts 5 minutes or longer, or breaches your individualized threshold. This requires immediate medical intervention to prevent brain injury [8][9].
  • Clusters or Failure to Recover: Multiple seizures that happen back-to-back without your child fully “waking up” or returning to baseline in between [8].
  • Breathing Issues: If your child turns blue or gray, has extreme difficulty breathing, or stops breathing.
  • New or Unusual Seizures: A first-time seizure or one that is clearly different from their normal pattern. Note: Suspected infantile spasm clusters warrant urgent same-day evaluation even if each movement lasts only seconds.
  • Non-Convulsive Status: If your child is suddenly much harder to wake up than usual, seems “vague” or “not there” for a prolonged time, or shows subtle repetitive movements (like eye fluttering) that don’t stop, they may be having “silent” seizures and need emergency assessment [10][11].

Always follow the specific Seizure Rescue Plan provided by your neurologist. If you are ever in doubt, it is always safer to call emergency services than to wait.

Common questions in this guide

What routine checks does a child with SLC35A2-CDG usually need?
Monitoring is individualized, but may include blood tests for liver and kidney function, a complete blood count, growth measurements, a vision evaluation, and sometimes a liver ultrasound. The child's care team decides which tests are needed and how often.
When should I call emergency services for a seizure in my child?
Call emergency services for a convulsive seizure lasting 5 minutes or longer, or sooner if the child's written plan sets a different threshold. Call immediately for repeated seizures without full recovery, breathing trouble or blue or gray color, a first or clearly unusual seizure, or prolonged unresponsiveness or subtle movements that may be a seizure. Suspected clusters of infantile spasms need urgent same-day evaluation even when each movement is brief.
What should I do while my child is having a seizure?
Time the seizure, protect your child from injury, and place them on their side when it is safe. Do not restrain them, put anything in their mouth, or give food, drink, or oral medicine while they are not alert. Use prescribed rescue medicine exactly as directed in the child's seizure rescue plan.
How can I tell whether feeding problems may involve aspiration?
Coughing, gagging, or very long meals can signal feeding or swallowing difficulty in a child with low muscle tone, but silent aspiration may not be obvious. The medical team may recommend a clinical feeding assessment, videofluoroscopic swallow study, or FEES when indicated. These evaluations check whether food or liquid is entering the lungs.
What does cortical visual impairment mean in SLC35A2-CDG?
Cortical visual impairment means the eyes may be physically healthy, but the brain has trouble interpreting what the eyes see. A pediatric ophthalmologist can assess for this condition and for strabismus, or misaligned eyes.
How do I know whether my child has returned to baseline after a seizure?
Baseline is your child's usual level of alertness and interaction, as defined with the medical team. A brief seizure that matches the usual pattern and is followed by recovery may not be an emergency, but failure to return to baseline, unusual sleepiness, or ongoing subtle movements requires urgent medical assessment. Always follow the personalized rescue plan and call if unsure.

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Questions to Ask Your Doctor

Curated prompts to bring to your next appointment.

  1. 1.Can we create a written 'Seizure Rescue Plan' that clearly defines when I should give emergency medication and at what minute mark I should call 911?
  2. 2.What are the specific baseline labs you recommend for my child, and how often will we repeat tests like the CBC and liver function panels?
  3. 3.Since my child has low muscle tone, should we schedule a formal swallow study to ensure they are not silently aspirating food into their lungs?
  4. 4.Which symptoms of my child's current seizure pattern should I consider 'normal for them' versus a new concern that requires a call to the neurology office?
  5. 5.Given the risk of cortical visual impairment (CVI), which pediatric ophthalmologist do you recommend who has experience with neurological vision issues?

References

References (11)
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    Liver manifestations in a cohort of 39 patients with congenital disorders of glycosylation: pin-pointing the characteristics of liver injury and proposing recommendations for follow-up.

    Starosta RT, Boyer S, Tahata S, et al.

    Orphanet journal of rare diseases 2021; (16(1)):20 doi:10.1186/s13023-020-01630-2.

    PMID: 33413482
  2. 2

    Four New Cases of SLC35A2-CDG With Novel Mutations and Clinical Features.

    Abuduxikuer K, Wang JS

    Frontiers in genetics 2021; (12()):658786 doi:10.3389/fgene.2021.658786.

    PMID: 34122512
  3. 3

    SLC35A2-related congenital disorder of glycosylation: Defining the phenotype.

    Yates TM, Suri M, Desurkar A, et al.

    European journal of paediatric neurology : EJPN : official journal of the European Paediatric Neurology Society 2018; (22(6)):1095-1102 doi:10.1016/j.ejpn.2018.08.002.

    PMID: 30194038
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    A case of early onset epileptic encephalopathy with de novo mutation in SLC35A2: Clinical features and treatment for epilepsy.

    Kimizu T, Takahashi Y, Oboshi T, et al.

    Brain & development 2017; (39(3)):256-260 doi:10.1016/j.braindev.2016.09.009.

    PMID: 27743886
  5. 5

    Clinical, neuroradiological, and biochemical features of SLC35A2-CDG patients.

    Vals MA, Ashikov A, Ilves P, et al.

    Journal of inherited metabolic disease 2019; (42(3)):553-564 doi:10.1002/jimd.12055.

    PMID: 30746764
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    Mosaicism of the UDP-Galactose transporter SLC35A2 in a female causing a congenital disorder of glycosylation: a case report.

    Westenfield K, Sarafoglou K, Speltz LC, et al.

    BMC medical genetics 2018; (19(1)):100 doi:10.1186/s12881-018-0617-6.

    PMID: 29907092
  7. 7

    Clinical and biochemical improvement with galactose supplementation in SLC35A2-CDG.

    Witters P, Tahata S, Barone R, et al.

    Genetics in medicine : official journal of the American College of Medical Genetics 2020; (22(6)):1102-1107 doi:10.1038/s41436-020-0767-8.

    PMID: 32103184
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    Generalized convulsive status epilepticus after retrograde type A aortic dissection surgery.

    Li Y, Wu Q, Shi H, et al.

    Perfusion 2021; (36(3)):318-321 doi:10.1177/0267659120943158.

    PMID: 32723152
  9. 9

    Current Management of Generalized Convulsive Status Epilepticus in Children.

    Aulická Š

    Children (Basel, Switzerland) 2022; (9(10)) doi:10.3390/children9101586.

    PMID: 36291522
  10. 10

    Nonconvulsive status epilepticus after cessation of convulsive status epilepticus in pediatric intensive care unit patients.

    Chen J, Xie L, Hu Y, et al.

    Epilepsy & behavior : E&B 2018; (82()):68-73 doi:10.1016/j.yebeh.2018.02.008.

    PMID: 29587188
  11. 11

    Electroencephalographic Seizures in Emergency Department Patients After Treatment for Convulsive Status Epilepticus.

    Zehtabchi S, Silbergleit R, Chamberlain JM, et al.

    Journal of clinical neurophysiology : official publication of the American Electroencephalographic Society 2022; (39(6)):441-445 doi:10.1097/WNP.0000000000000800.

    PMID: 33337664

This page is for informational purposes only and does not constitute medical advice. It describes general monitoring and emergency guidance for children with SLC35A2-CDG; follow your child's personalized plans and contact their medical team or emergency services when needed.