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Dr. Scott McLean

Clinical Genetics
San Antonio, TX
36 years experience male

Locations

Children's Hospital of San Antonio

San Antonio, TX

Address

333 N Santa Rosa Street, San Antonio, TX, US
Directions

Fax

(210) 704-4952

Insurances accepted

Medicaid

Medicare

Cigna

Tricare

UnitedHealthcare

Blue Cross Blue Shield of Texas

Aetna

About

Bio

Clinical Geneticist at Children's Hospital of San Antonio, on the faculty at Baylor College of Medicine, where I am an Associate Professor of Pediatrics and an Associate professor of Human and Molecular Genetics.

Specialties
Doctors may have more than one area of specialty interest. Board certification in a specialty area means the doctor has completed formal training and has practice experience in that specialty, and has passed the certification examination from the corresponding accredited medical specialty board.

Clinical Genetics

Languages spoken

English

Doctor Q&A

80 Answers
24 Agrees
The number of answers this doctor has agreed with.
A 22-year-old male asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
Several disorders: Epilepsy (recurring seizures) can occur in several different types of inherited biochemical diseases, including organic acidemias, urea cycle disorder... Read More
A 27-year-old female asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
Time to see your doc: Pku - short for phenylketonuria - is a serious condition that should be treated with a low-phenylalanine diet. If you are on diet, check with your nut... Read More
A 36-year-old female asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
Depends: Sequencing is like reading war and peace letter by letter, and deletion/duplication testing is like seeing if a chapter is completely missing or prese... Read More
A 18-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
You're helping now!: Asking questions is the most important first step. Good job! kids with Down syndrome speak and play differently sometimes because that's just the way ... Read More
A 41-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
Both: Birth defects occur in every group of human beings on this earth. Often the cause is genetic, including chromosome rearrangements and mutations in sin... Read More
A 30-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
About half: Neurofibromatosis type 1, also known as nf1 or von recklinghausen's disease, is caused by alterations to a gene on chromosome 17. These mutations can ... Read More
A 37-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
Several treatments!: Yes! children and adults with Marfan syndrome can have gradual widening of the aorta - the major artery connected to your heart. Sometimes the aorta b... Read More
A 30-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
Offered .. sometimes: Alzheimer disease is a condition for which we have several genetic tests - apoe e4, app, psen1, & psen2. However, these tests are not used to establis... Read More
A 47-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
Of course: But then again who among us can claim to have a normal life? Men and women with fragile x syndrome can be, just like the rest of us, happy or unhappy,... Read More
A 46-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
No: Children born to us servicemembers do have birth defects, but not more often than any other group: 3/100 births. These questions about parents' expos... Read More
A 41-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
Yes, but ...: Right now we know of about 10 genes that cause als, but there are probably more, because genetic testing finds a mutation in less than a third of ALS ... Read More
A 42-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
Very low: 99.5% of the time, there is just one child with rett syndrome in a family. This rare genetic condition occurs almost always in girls. It's caused by a... Read More
A 29-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
Look at this picture: An epicanthal fold is a skin fold from your upper eyelid that slightly covers the inside corner of your eye. Here is a good link: http://www.Nationwid... Read More
A 24-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
Sometimes: Cardiomyopathy (cm) is weakness of the heart muscle. This can be caused by alcoholism, high blood pressure, certain drugs, and other environmental exp... Read More
A 30-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
3 to 5%: Did you mean scheuermann disease? For this diagnosis, genetic factors are more important than environmental ones, but we haven't been able to find spe... Read More
A 35-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
No: Sweat chloride testing at an accredited testing center is the standard way to diagnose cystic fibrosis. You do not have to get any other tests first t... Read More
A 45-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
Probably: As you know, neurofibromatosis type 1 (nf1) can affect some people mildly, but in others it can cause serious birth defects. The chance that a sperm d... Read More
A 32-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
Not sure: Charcot-marie-tooth (cmt) neuropathy is a condition that affects nerves and usually gets slowly worse over time. There are dozens of kinds of CMT - so... Read More
A 47-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
An echocardiogram: If you have Marfan syndrome, you should be aware that your cardiologist can use ultrasound to watch for the gradual enlargement of your aorta. Dependi... Read More
A 24-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
No: Hereditary hemochromatosis develops when you inherit two mutations, one on each of your hfe genes. You have just one. About 1/10 folks with northern e... Read More
A 46-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
Why, yes! Yes it is!: In fact, if you examine my own photo carefully, you will see that i myself can boast that I have slight synophrys, aka monobrow, one of the most devil... Read More
A 25-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
It depends: Because there are many genetic causes of autism, occasionally people with autism have additional problems, like birth defects, a weak immune system, o... Read More
A 34-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
Sometimes: Genetics can certainly influence the shape of the thorax through the the way that genes control the growth of the ribs, vertebrae, and lungs. Folks wi... Read More
A 30-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
The web & your doc: Three good sources are the centers for disease control website for genomic medicine (http://www.Cdc.Gov/genomics/), the national library of medicine's... Read More
A 30-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
See your doctor: The best place to start is with your primary care physician. A very thorough family history and an ultrasound will help determine if you have pkd. You... Read More
A 41-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
SCDAA & ASCAA: The sickle cell disease association of america (http://www.Sicklecelldisease.Org/) and american sickle cell anemia association (http://www.Ascaa.Org/)... Read More
A 31-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
Not true: Trisomy 13 (3 copies of chromosome 13 in all your cells) is caused by an error in the way one of your two chromosome 13s move when you make an egg or ... Read More
A 35-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
Education & Training: Genetic counselors hold masters degrees in genetic counseling and then take board certification examinations. In some states they must be licensed as ... Read More
A 30-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
Uncooked shellfish +: For each type of hemochromatosis (there are at least 3 types!), avoid uncooked fish shellfish from the ocean because you risk becoming ill (even fatal... Read More
A member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
Excellent question: Huntington disease is a serious condition - genetic testing can be extremely helpful. Good information is here: http://www.hdsa.org/. No test is perfe... Read More
A 40-year-old female asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
No: The 5,10-methylenetetrahydrofolate reductase (MTHFR) enzyme, when it is not present at all, causes seizures and intellectual disability. This is very ... Read More
A 39-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
It varies: Signs of neurofibromatosis type 1 (nf1) can appear before birth or may not be apparent until well into adulthood. Cafe-au-lait (that's french for coff... Read More
A 32-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
A man: Xxy is shorthand for the arrangement of chromosomes in klinefelter syndrome. These men are generally well - they have all of their man parts - but can... Read More
A 43-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
They grow up!: Boys and girls with fragile x syndrome grow up to be men and women with fragile x syndrome: loved and loving people with full lives. Like many adults... Read More
A 39-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
Nope: Aniridia, complete or partial absence of the iris, can be an isolated birth defect or part of a bigger condition, like WAGR syndrome (http://www.Wagr.... Read More
A 28-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
It depends: It depends on the details of the family history. Tourette's is inherited in a complicated way that we don't completely understand, but we know that i... Read More
A 34-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
Genetic tests help: But tests alone will not confirm the diagnosis in 1 out of 10 children with angelman syndrome. Common signs are very delayed development, speech impai... Read More
A 33-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
Your doc should know: Most newborns are screened for dozens of genetic conditions immediately after birth. Some of theses conditions involve problems with fatty acid oxidat... Read More
A 29-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
Sometimes: Pallister-killian syndrome is a rare genetic condition caused by a chromosomal rearrangement that may cause birth defects, like cleft palate. Children... Read More
A 42-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
It depends: It depends on why the birth defect occured in the first place - some causes are environmental, like if mom was drinking during early pregnancy, and ot... Read More
A 45-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
I'm not sure!: I am just not sure what the "integrated test" is. And this is not a criticism of you at all. The words in medicine and especially in genetics are craz... Read More
A 36-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
Single gene disorder: Neurofibromatosis type 1 is caused by a mutation of the nf1 gene on chromosome 17. This gene normally allows your cells to make a protein called neuro... Read More
A 32-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
Look at this picture: An epicanthal fold is a skin fold from your upper eyelid that slightly covers the inside corner of your eye. Here is a good link: http://www.Nationwid... Read More
A 45-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
1, 6, and 19: Msud is caused when a tightly clustered group of proteins [branched-chain ketoacid dehydrogenase] does not work properly. This multienzyme complex has... Read More
A 33-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
Yes: It's very unusual for someone to inherit two mutations - one for each of their huntington disease genes, but it's possible. A person with homozygosity... Read More
A 34-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
A few possibilities: Your primary care phsyician - internist, family practitioner, ob/gyn - should be your first stop. Do the basics - a good history and review of systems... Read More
A 33-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
Yes, this is true: Diabetes that is not treated properly can cause problems with your eyes, heart, and kidneys. If you are pregnant and you have diabetes that is not und... Read More
A 48-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
Yes: Osteogenesis imperfecta, or oi for short, is caused by genetic mutations of certain collagen genes. There are a number of types, and the severity can ... Read More
A 39-year-old member asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
Yes, but carefully: Acute intermittent porpyria, or aip for short, is caused by low levels of the hmbs enzyme. Symptoms include episodes of severe abdominal pain, seizure... Read More
A 57-year-old female asked:
Dr. Scott McLean
Clinical Genetics 36 years experience
Tough situation: My guess is that this will require a careful look at the overall health status, current meds, and neurological examination. Adults with ds do sometime... Read More

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Testimonials
Recommendations and Thank you notes are endorsements given from patients or other doctors.

3
Recommendations
247
Thank you notes
Jun 11, 2015
excellent and caring
HealthTap member
Mar 30, 2015
Dr. McLean is an amazing doctor! #nationaldoctorsday2015 #virtualflower1
HealthTap member
Mar 31, 2015
Dr. McLean is an amazing doctor! #nationaldoctorsday2015 #virtualflower1
HealthTap member
Thanks for the suggestion. I will ask my daughter's geneticist next week when we see him. The smell comes and goes so maybe 10cc's per day might be too high of a dose. I would rather it be too high th...Read More
HealthTap member
Thank you, your answer or tip was very helpful! I've never heard a probability applied to the chance of inheritance. Very interesting.
HealthTap member
Thanks, but could this be passed on to the unborn child 4 different times, I have 2 healthy children from previous marriage,

Education & Training

Medical/Graduate school

Uniformed Services University of the Health Sciences F. Edward Hebert School of Medicine, MD,1986
Graduated 1986MD

Awards

AOA Honor Medical Society
US Army "A" Proficiency Designator
Top Clinical Geneticist , Second Place, National - Summer
2013

Affiliations

American College of Medical Genetics
American Academy of Pediatrics
Society of Inherited Metabolic Disease
90,000 U.S. doctors in 147 specialties are here to answer your questions, provide medical advice, write prescriptions, and more.
Answer emailed
in 24 hours or less