Dev. Delay, mild facial dysmorphisms, large tongue
Updated: Description of my 2 yr. old daughter's symptoms
My daughter has an undiagnosed genetic syndrome - it is characterized mainly by global developmental delay, mild facial dysmorphisms, moderately low muscle tone, and a large tongue with mid-line groove. She is also large for her age, and had late tooth eruption (16 mos.). No medical or internal issues that we know of. Her hearing and vision are normal (slightly farsighted, but not enough for glasses). She was induced 2 weeks early (11/5/07) for suspected IUGR (growth restriction). But was born 6 lbs, so was 10th percentile after all. Pronounced "floppy" at birth, and had trouble transitioning to breathing because of fluid in her lungs. After a couple hours on a CPAP machine, her breathing was fine, and a heart murmur they'd heard at first had disappeared. She was released with a clean bill of health, though they noted she had a large tongue.
She did not breastfeed well, but took the bottle fine. Had reflux which resolved by 2.5 months. She grew large very quickly, and by 4 months was in the 100th percentile for weight, and has stayed there. She has moderately low muscle tone (esp. trunk). She has some "mild" facial dysmorphisms, enough that, beyond her dimples, her face does not look like our faces:
- wide-set eyes, whites of her eyes are blue
- large tongue, with mid-line groove (tongue was almost always out 1st year of life, now at 2, tongue-control is much improved and it's only out when she's concentrating or tired)
- mild-to-moderate low muscle tone
- thickened ear helices
- flat nose
- coarse features
- synophrys (hair between eyebrows)
- plagiocephaly (square-ish head)
- mildly tapered fingers
- One over-sized big toe (big toes evened-out to same size by age 2)
- Small feet for age (about a year behind in growth)
- Global developmental delay
Developmentally, she is delayed about 40-50% overall. Gross & fine motor and speech are the most severely delayed. Cruising, but still not walking independently at 26 mos, and just starting to say a few words and imitate words spoken to her. Easy-going, no behavioral issues, attends a typical daycare w/typical kids. Social/emotional are the least delayed. Loves music/sounds. Loves puzzles and books, and anything with buttons to press. Very social, smiles readily, likes adult attention during play, upset by other babies' crying. Not a big crier herself, though. Gets tired easily, but only sleeps in catnaps (30-45 mins 1-2x/day), then sleeps a solid 12 hr. night.
Significant milestones:
- Smiles: 8 weeks
- Sits independently: 7-10 months (but constant falling backwards and throwing herself back at first - eventually overcame that balance issue)
- Reaches for toys: 8 mos.
- Rolls over: 11-14 mos.
- Drinks from sippy-cup independently & self-feeding: 11-13 mos.
- Sits up from lying down: 14 mos.
- 4-point crawling: 16 mos.
- First teeth: 16 mos. 2 bottom teeth first: a bit small/wide-spaced compared to teeth of typical babies
- Stranger anxiety: 20 mos.
- Pulls self up to stand: 22 mos.
- Says first words, "mama" and "dada" (and num-num for food): 22 mos.
- Feeds self w/spoon independently: 25 mos.
- Cruises at table or sofa: 25 mos.
Following tests were normal:
- Amniocentesis
- CGH wide-array chromosomal testing
- Angelman Syndrome
- Fragile X
- Metabolic testing
- Brain MRI showed no significant or insignificant issues, though some features were "noted", like asymmetry, and her brain not filling up her skull quite as much as expected.
- Known genetic syndromes involving overgrowth and large tongue have been excluded by geneticists on the basis that she has none of the other symptoms of those syndromes, so has not been tested for those (Beckwith-Weidemann, etc.).
Geneticists (Stanford, CA) are out of ideas for now, and we are to come back at age 3, or if she has new significant symptoms. She is in various therapies: PT, OT, and Speech is starting now at 26 mos. Click on her photo to see it in more detail, and let me know if your child looks similar, or has a similar combination of symptoms?
Thank you,
Sara


short differential diagnosis
A large tongue or macroglossia may in this instance be classified by two causes: congenital and metabolic causes.
1) Congenital causes:
a. Cretinism (hypothyroidism)
b. Hemangioma
c. Lymphangioma - see below
d. Robinow Syndrome
e. Beckwith-Weidmann Syndrome (macroglossia, omphalocele, postnatal gigantism, craniofacial abnormalities including maxillary hypoplasia and a prominence of the occiput, hypoglycemia and an increased incidence of Wilm's Tumor, adrenal carcinoma, or hepatoblastoma.)
f. Down Syndrome -- presumably ruled out by the normal karyotype
g. Trisomy 4P Syndrome
h. Triploid Syndrome
i. Any of the Gangliosidoses Syndromes
j. Any of the Mucopolysaccharidoses Syndromes
2) Metabolic causes:
a. Myxedema (hypothyroidism)
b. Amyloidosis
c. Lipoid proteinosis
.
The most common reported cause of macroglossia is lymphangioma, a rare congenital tumor presenting in the first year of life with malformed lymphatic tissue involving the tongue. These tumors grow slowly and are progressive. Unlikely to be associated with the other features of your child but it remains on the list.
Evaluation: The choice of laboratory tests is guided by the clinical findings. Karyotyping or examination of the chromosomes I assume is normal. Though the test may have been done at birth as part of neo-natal screening, exclude hypothyroidism as a cause – it is very easy to treat. (A thyroid scan may reveal a lingual thyroid causing a large tongue if goiter is a clinical feature.)
My final piece of advice -- go to a larger medical center where they see many more cases of genetic disease.
Editor