I think it's a good idea not to pay too much attention to the MR
label in autistics. Not all autistics have MR, but many with
communication difficulties are underestimated intellectually,
sometimes to an extreme degree (eg a person thought to have an IQ
around 25 but it turns out to be 133).
--- In trisomy_9q@yahoogroups.com, shanley teresa
<shanley_n_teresa@y...> wrote:
>
> You have given me wonderful information. My baby brother did have
complete mosaicism, he was not supposed to have lived as long as he
did. My son does not have any physical abnormalities, he looks
perfectly normal, which is even harder sometimes to try to explain
his behavior to others.
>
> I would like to get to a genetic doctor though. My son is five
now, and also has a diagnosis of mental retardation. I don't know
if that is just secondary to the autism or what, as all autistics
have some level of retardation. My son excels in some areas, and
falls way behind in others, so I tend to not pay too close attention
to the retardation part, that is usually across the board.
>
> Thank you for your response
> Teresa
>
> ettinashee <ettinasatot@f...> wrote:
> Hi. I'm autistic also. Does your son have an unusual appearance,
> birth defects, etc as well as autism? If so, he may well have some
> kind of syndrome, possibly chromosomal. But autism is very common
> and most autistic kids don't have any syndrome causing it, the
cause
> is not known.
> With regards to having multiple kids with trisomy 9, it depends on
> the type. Mosaic trisomy 9, where the child has an entire extra
> chromosome 9 in some of their cells, is highly unlikely to happen
> again. But if a kid has partial trisomy 9, it could be that the
> extra piece of chromosome 9 is attached to another chromosome, in
> which case the parent may have a balanced rearrangement involving
> chromosome 9 and the child has an unbalanced form. Which means
that
> they could have another kid with partial trisomy 9 or the
opposite,
> partial monosomy 9. And their normal children could inherit the
> rearrangement in the balanced form, and therefore have partial
> trisomy or monosomy 9 children.
> Secondly, it could be that the parent has very low-level
mosaicism,
> which would mean that some of their cells are abnormal, but not
> enough to have a noticeable effect. But if that includes cells in
> the ovaries or testicles, they could have multiple kids with a
> chromosome abnormality. Their unaffected children would not be any
> more likely to have a child with a chromosome abnormality than
> anyone else. Also, it's unlikely that kids with mosaic trisomy 9
> would result - they'd either have full or partial trisomy 9,
> nonmosaic (all the child's cells are affected). Full nonmosaic
> trisomy 9 is fatal, but nonmosaic partial trisomy isn't.
> Ettina
> --- In trisomy_9q@yahoogroups.com, "shanley_n_teresa"
> <shanley_n_teresa@y...> wrote:
> >
> > My baby brother was born with Trisomy 9 mosaicism back in 1981,
he
> > died at the age of two. When I became pregnant with my daughter
I
> > was terrified that she might too have it, so I went to a genetic
> > doctor who said that no, my probability of having a child with
> > trisomy 9 was almost impossible as it is not hereditary. I did
> > notice that at least one of you have two children with trisomy
9.
> > How can that be if it's not a hereditary issue.
> >
> > I have a 3 year old son who has been diagnosed with autism. Now
> I'm
> > really curious to know if he may, in fact, have a trisomy of
some
> > sort.
> >
> > Forgive me for being so ignorant...I was very young and the
> disease
> > was practically unheard of at the time I dealt with it.
> >
> > Teresa
> >
>
>
>
>
>
>
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