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Symptoms: To date, Georgia has continually shown progress and has had no obvious regressions.
Mild benign unilateral hypotonia dx at 18 months based on the follwing:
 
-Georgia seemed unbalanced/wobbly when "walking" while holding mom's hand
-At 18 months Georgia did not have the coordination or strength to walk independently
-Right side was markedly unequal in tone (weaker) thus explained her crab crawl..
-Crawling was slightly delayed..11 months
 
Delayed Speech:
 
-At 18 months Georgia did not have any consistent words..but did babble and use many consonants...
 
 
 
 
Tests Results and Clinical Observation:
 
  • Normal cognition and receptive language
  • Normal neurological responses
  • No regressions
  • No history of seizures or ataxia
  • No dysmorphic features noted
  • Hearing: Normal
  • Metabolic blood panel done 2x: both normal
  • Urinanalysis for cystinuriah and amino acids: normal
  • CBC: normal
  • Hypothroidism: negative
  • PKU: negative
  • CPK: normal
  • Blood tests for Lysosomal Storage Diseases type 1 & type 2:NEGATIVE!
  • Chromosomal basic analysis: 46 XX (normal girl) 
  • Chromosomal subtelomeric probe: normal
  • MRI brain scan with and without contrast: multiple abnormalities: 
  1.  mild delay in myelination
  2.  partial dysgeneis of the corpus callosum
  3.  marked dysplasia of the left cerebelar hemisphere
Prognosis:
 
Our neurologist says that Georgia's MRI results were "unexpected". He seems confident that there is no indication of an underlying condition. There is no evidence from any of the tests results that we are dealing with a progressive disease. That the MRI findings are not consistent with any serious disorder or disease.
Yet, the dyplasia of the cerebellum DOES explain the source of the hypotonia. As the area in question does affect balance, coordination and MUSCLE TONE. He felt strongly that this is suffient evidence to explain the hypotonia, and did not feel it necessary to warrent any further testing. Our neuro did stress that Georgia is now at increased risk for seizures and learning discibilities. But as Georgia has not had a seizure by age 2, the possiblity of one is small.
 
I have had two additional Neurologists opinions and they all agree with the original neuro. The damage is "done" in a sense and the best thing is to move forward with continued physical therapy and speech therapy.
 
I have also been fortunate to seek a 2nd opinion from a top radiologist to reexamin the findings of the MRI. He also concluded that the abnormalities were non-progressive and were not significant in terms of any serious condition or disease.
 
The Genetic Question:
 
So the big question now is: Is this GENETIC?

Well it turns out that genetic in terms of Georgia can mean either 2 different things...

A) This is a "genetic" condition that my husband and I both carry a gene for and we have passed on to Georgia. That the chances of us passing on this condition are 25% to all our children.

B) This is a genetic condition described as "sporadic" - meaning, that a fluke or toxin or whatever...damaged one or more of her chromosomes....which caused her migrational abnormalities which we found on her MRI scan. The chances of a reacurrence are 1 in 1000 - same as with the general population.

The geneticist we saw was a WONDERFUL man who was kind and forthcomming and respectful of all my questions and what knowledge I do have....
He said that he thinks Georgia has scenario #B in the genetic question. He would guess that "damage" was done to one or more of her chromosomes thus causing the brain dysgenesis. That our chances of passing this on were 1 in 1000. He said that Georgia's brain abnormalities were mild on the spectrum of how abnormalities rate. He said that it would be foolish to try and guess whether she will have learning issues...but it is a great sign that her memory is so great and she understands abstract images. If he has to guess..he said that Georgia may be a hair whisper behind her peers in learning...but maybe not.

The Dr also noted that Georgia had a larger forehead and fuller eyebrows, and a "bulbous" nose....I asked if he would consider that "dysmorphic". He said that it could mean nothing...but there is a group of diseases called "storage disease" that have those symptoms inculding an enlarged spleen and liver (which her liver and spleen are normal)....and to be safe we should rule them out with a blood test. Now...this is important..I never really liked my nose...but Georgia clearly has my nose! And she clearly has my husbands eyebrows....and the forehead...well I have to look at Ryan's baby pictures again to be sure about his forehead...but nithing about Georgia's facial features are unusual to us..she looks like a perfect mix! 

Too bad Ryan worked that day. The Dr said the same thing....if they had been able to see Ryan, perhaps that was one more test we wouldn't have to worry about. The Dr said a storage disease was very "unlikely"...
But it was worth at least ruling out. The thought of that possibilty makes me feel sick inside. My gut tells me that this is NOT the case. 

Anyway...we also had blood drawn for chromosomal testing...to look at her chromosomes up close to see if everything looked normal - the basic 46 chromosomes and the XX. They are also doing a closer study on the chromosomes to make sure none of the chromosomes are slightly off..."tipped" is the word the Dr used. He said that the chances that we will actually see an oddity among her chromosomes is 5-10%. But that doesn't mean that it isn't there..we simply lack the technoology to look further.

We won't have the results back for "months"...how long that means...4,5,6 months...? They don't know. They will call us. 

They also asked if Georgia would partcipate in a study...as the Dr and his fellow are doing a study on the corpus callosum right now...The Drs thoughts on the corpus callosum and Georgia: He felt that certainly Georgia's brain has been rerouting. That most definitely it has  - but we just can't see it on an MRI scan. He also noted that he has seen children with the dysplasia of the cerabellum that do in fact have a speech delay. He felt that with Georgia's case, her speech delay was connected with the abnormalities. This is the only issue that he told me point blank, "concerned him". 

The DR went patiently through the details of Georgia's MRI scan with me and noted the areas and referred to them as "mildy abnormal".  He also said that Georgia's mild delay in myelination was not significant.

Geneticist's Prognosis based on Evaluation:

Bottom line: He said that he was concerned about Georgia's lack of speech and would keep an eye on that. He said that her issues were otherwise mild and expects her to fit right in with her peers. He said that she seems like a typical 2 year old cognitively, but made a hesistant guess that she may have minor learning issues. But quickly retracted and said that she may do very well. That he didn't know and would be foolish to guess at this point. He was impressed with her engaging personality and said she was age level emotional/social.... He said that I was doing everything right as far as giving her the opportunity to improve through therapy and play programs.

So - we wait for the blood results and watch her speech issue.

Genetic Blood Test Results:

The blood work all came back normal for lysosomal storage diseases type 1 & type 2....yea. It was highly unlikely but non the less very stressfull to wait.

Her chromosomes look normal as well.

Genetic Follow-up Appointment w/Geneticist Aug 25, 2003

We went to see the geneticist/neuro today again just for a discussion session & mini catch up evaluation on Georgia...

I hade my list of questions based on a lot of info I got here on the board etc...

So, I update him on Georgia's speech progress...a couple of spontaneous words. "baseball bat" etc..strange child..:)Of course he thought this was all very encouraging. We mainly talked about the small genetic details regarding Georgia and the technology of genetics right now. This I thought some of you would find interesting.

As Georgia's basic chromosomes look normal..that was to be expected as Georgia is pretty high functioning. With the "high resolution chromosomal test" he is looking at the individual chromosomes to see if the ends had "fallen off". Thus losing for example 1-8 individual genes..which would explain Georgia's cerebellum and corpus callosum dysgenesis and dysplasia. If we don't find that information..it is still considered sporadic. It's all a matter of time before technology catches up. And it will. By the time Georgia is of child bearing age...the Dr said that they will have that technology. That all of us here with children that are suspected of having a sporadic fluke will be able to access that info as adults if they choose.

He most defnitely thinks this is a sporadic fluke as the tail and the tip of the corpus callosum do not fully develop until later in the 1st triemster and the cerebellem dysgenesis indicates that at least a small part would have been able to form up until the 8th month and Georgia's DID NOT continue to develop. Thus, the sporadic fluke in Georgia's chromosomes would explain the follow through of the abnormalities...

The chances that this is a genetic recessive condition are highly HIGHLY unlikely..the likelood of this would be that dh and I are the only known carriers of a NEWLY discovered genetic condition that causes 2 small brain abnormalites...unlikely. As there is no known case like Georgia's ever.....one in a million child.

Otherwise..he said that it was unlikely Georgia would EVER have seizures..so to stop being on "seizure watch".

Georgia was able to point out several animals in the book we brought and dh and I felt relieved to impress the Dr with that...(that she understands)

As far as another baby he gave me a name of an OB trained in genetics at UCSF..she is considered a high-risk OB and we would have access to a higher level ultrasound.
He also gave me the name of a radiologist who will do an MRI of ME when I am pregnant with baby #2. That will give us an absolute answer given that we have the MRI done at the right time in my pregnancy...to see if this happened with baby #2.

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