First a little update, then a big one.
To start, the little lady packed on the pounds over night, and is now officially a 7 pounder. Her overnight weight was 3,230g (7.12lbs) which is just about 2 lbs up from her birth weight. She’s still way, way low on the growth chart, but any growth is good growth for us.
For the big update: earlier this week MNG Labs completed the Next-Generation sequencing that we ordered in May. We met with Olivia’s core team, along with the pediatric neuromuscular specialists on Tuesday to discuss the results.
Unfortunately, despite sequencing nearly 200 genes that are most commonly associated with known neuromuscular disorders, the panel came back “indeterminate”. In other words: the test did not provide us with an official diagnosis, and we are still unable to associate a name… a specific disorder… something well known and understood… to Olivia’s condition.
The panel did however identify mutations on two of the analyzed genes.
- One mutation is being disregarded as benign, as it’s on a gene that isn’t responsible for anything that fits within Olivia’s clinical picture.
- The other mutation is of much more interest to us and her team, because this specific gene is understood to be closely related to an important part of muscle function (Olivia’s primary issue).
This mutation is incredibly rare, in fact never seen before, so it is considered a “variant of unknown significance”. But… based on: the gene’s role in muscle function, the type of mutation (“likely pathogenic”), and Olivia’s clinical picture… it’s seemingly significant.
In order to more confidently confirm that Olivia’s myopothy is in fact a result of this gene mutation, she’ll undergo a muscle biopsy. A muscle biopsy is a relatively small procedure in the realm of pediatric surgeries, but it is still a surgery. Under a microscope, muscles affected by various myopathies have fairly distinct appearances, and depending on whether something atypical is observed in her muscle sample, Olivia’s team may be able to officially connect the dots between this mutation and how it’s impacting her muscles.
If they are able to connect the dots, Dr. C (the pediatric neuromuscular specialist we’ve been working with here at University of Rochester) will have the data points she needs to begin consulting with other specialists in the field with more of an expertise on this particular gene. One doctor in particular works out of NIH, and has dedicated his career to studying this one, specific gene!
Over the next couple of weeks as Olivia’s biopsy takes place and we learn more about what these test results mean for her, we’ll keep you all up to date. In the meantime, here’s today’s installment of: a snoozy, sprawled out baby.