Diseases & Variants
The human genome is massive, including 3 billion nucleotide base pairs, and approximately 20,000 genes. Most of these genes contain instructions for producing proteins that determine how our bodies function.
Genetic disease occurs when there is a permanent alteration in the DNA sequence that makes up a gene. Simply put, variants or changes in genes can cause a variety of disorders. Many different types of variants can cause disease.
View the list below with genetic conditions we've seen or researched at the Clinic.
Hyperinsulinemic hypoglycemia of infancy
ABCC8 c.2995 C>T — Amish
Sitosterolemia
ABCG8 c.1720G>A — Amish
Medium-chain acyl-CoA dehydrogenase deficiency
ACADM c.1084A>G — Mennonite and Amish
ACADM c.386-30A>G — Mennonite
ACADM c.199T>C - Amish
Very long-chain acyl-CoA dehydrogenase deficiency
ACADVL c.848T>C — Amish
Severe combined immunodeficiency due to adenosine deaminase deficiency
ADA c.424C>T
Adenosine deaminase deficiency
ADA c.646G>A — Amish
Weil-Marchesani syndrome
ADAMTS10 c.1-2349_1797+1085del — Amish
Microcornea with myopic chorioretinal atrophy and telecanthus
ADAMTS18 c.2397C>G — Amish
Aicardi-Goutieres syndrome 6
ADAR c.577C>G — Mennonite
ADAR c.296dupT — Mennonite
Reticular dysgenesis
AK2 c.622T>C — Amish
Cutis laxa, autosomal dominant 3
ALDH18A1 c.2293C>T — Amish
Hereditary fructose intolerance
ALDOB c.448G>C — Mennonite
Vitamin B12 deficiency
AMN c.689_733delinsGG — Mennonite
Non-syndromic intellectual disability
ANAPC7 c.511-2480_919+3276del — Amish
Familial hypobetalipoproteinemia-2
ANGPTL3 c.361_365delAACTC — Mennonite
Torkelson syndrome
APOA4 c.552_749dup — Mennonite
Familial hypercholesterolemia
APOB c.10580G>A — Amish
Androgen insensitivity syndrome
AR c.2599G>A — Amish
Bohring-Opitz syndrome
ASXL1 c.3637_3640delCTCC
Wilson disease
ATP7B c.3207C>A
Byler disease
ATP8B1 c.923G>T
Familial hypercholanemia
BAAT c.226A>G — Amish
Bardet-Biedl syndrome 2
BBS2 c.472-2A>G
Maple syrup urine disease
BCKDHA c.1312T>A — Mennonite
Lethal neonatal rigidity and multifocal epilepsy
BRAT1 c.638dupA — Amish
Susceptibility to familial breast and ovarian cancer
BRCA2 c.5073dupA — Amish
Biotinidase deficiency
BTD c.1330G>C — Amish and Mennonite
BTD c.1368A>C — Mennonite
BTD c.1459T>C — Mennonite
Deafness, autosomal recessive 93
CABP2 c.608T>C — Mennonite
Episodic ataxia, type 2, and hemiplegic migraine
CACNA1A c.3043G>A — Amish
Timothy syndrome
CACNA1C c.1216G>A — Amish
Idiopathic generalized epilepsy
CACNA1G c.6806_6807delCT — Amish
Intellectual disability, autosomal dominant, 54
CAMK2B c.853C>T
Limb-girdle muscular dystrophy, type 2A
CAPN3 c.2306G>A — Amish
Trichohepatoneurodevelopmental syndrome
CCDC47 c.1145delT — Amish
Primary microcephaly 6
CENPJ c.40C>T — Amish
Complement factor I deficiency
CFI c.1400A>C
Properdin deficiency
CFP c.379T>G — Mennonite
Cystic fibrosis
CFTR c.1521_1523delCTT — Mennonites and Amish
Multiple pterygium syndrome, Escobar variant
CHRNG c.459_460dupA — Amish
Spondyloepiphyseal dysplasia and humerospinal dysostosis
CHST3 c.1298C>T — Amish
Bartter syndrome
CLCNKB c.0 — Amish
Neuronal ceroid lipofuscinosis 6
CLN6 c.358_366delTTCATCATG — Amish
Achromoatopsia 2
CNGA3 c.1126G>A — Mennonite
Achromoatopsia 3
CNGB3 c.1148delC — Mennonite
Cortical dysplasia and focal epilepsy
CNTNAP2 c.3709delG — Amish
CNTNAP2 c.403-4604_550+32804delinsGTACAA — Mennonite
Osteogenesis imperfecta
COL1A2 c.2148_2156delinsACGTGG — Mennonite
Knobloch syndrome
COL18A1 c.4054_4055delCT — Amish
Osteogenesis imperfecta
COL1A2 c.2098G>T — Amish
Intellectual disability-34 with variant lissencephaly
CRADD c.382G>C — Mennonite
Chronic granulomatous disease
CYBB c.1222G>A — Amish
CYBB c.1335C>A — Amish
11-beta-hydroxylase deficiency
CYP11B1 c.1343G>A — Amish
Aldosterone deficiency
CYP11B2 c.104_109delinsG — Amish
Corticosterone methyloxidase type I deficiency
CYP11B2 c.954G>A
Glaucoma 3A, primary open angle, congenital, A
CYP1B1 c.1405C>T
Congenital adrenal hyperplasia due to 21-hydroxylase deficiency
CYP21A2 c.518T>A — Amish
Infantile hypercalcemia
CYP24A1 c.1325delA — Amish
Spastic paraplegia 56
CYP2U1 c.1206_1207delAG — Mennonite
Familial focal epilepsy with variable foci
DEPDC5 c.1453C>T — Mennonite
Duchenne muscular dystrophy
DMD c.5353C>T — Mennonite
DMD c.5972delT — Amish
Ciliary dyskinesia, primary, 18
DNAAF5 c.2374C>T — Mennonite
Primary ciliary dyskinesia
DNAH5 c.4348C>T — Amish
Dilated cardiomyopathy with arrhythmia
DSP c.699G>A — Amish
Thyroid dyshormonogenesis 5
DUOXA2 c.829_830delTG — Amish
Hirschsprung disease
EDNRB c.828G>T — Mennonite
Inflammatory skin and bowel disease, neonatal, 2
EGFR c.560-2_565delAGGCCAAA — Mennonite
Intellectual disability
ELP2 c.1580G>A — Amish
Cockayne syndrome
ERCC6 c.2709+1G>T — Amish
Ellis-van Creveld syndrome
EVC c.1886+5G>T — Amish
Pontocerebellar hypoplasia, type 1B
EXOSC3 c.238G>T — Amish
Multiple exostoses, type 1
EXT1 c.1818G>A — Amish
Prothrombin thrombophilia
F2 c.*97G>A
Thrombophilia, susceptibility to, due to factor 5 Leiden
F5 c.1601G>A — Amish and Mennonite
Hemophilia A
F8 c.2053G>A — Amish
Hemophilia B
F9 c.1025C>T — Amish
Factor 11 deficiency
F11 c.1327C>T — Mennonite
Marfan syndrome
FBN1 c.3704delC — Amish
Crouzon syndrome
FGFR2 c.1024T>A — Mennonite
Apert syndrome
FGFR2 c.755C>G — Amish
FGFR2 c.758C>G — Amish
Pfeiffer syndrome
FGFR2 c.799T>C — Amish
Achondroplasia
FGFR3 c.1138G>A
Thanatophoric dysplasia
FGFR3 c.742C>T — Amish & Mennonite
Muenke syndrome
FGFR3 c.749C>G — Amish
Posterior column ataxia and retinitis pigmentosa
FLVCR1 c.361A>G — Mennonite
Glycogen storage disease Ia
G6PC c.1039C>T
Pompe disease
GAA c.2238G>C — Mennonite
Galactosemia
GALT c.563A>G — Amish
Gaucher disease
GBA c.1226A>G
Charcot-Marie-Tooth disease type 2GG
GBF1 c.3525G>A — Amish
Glutaric aciduria, type 1
GCDH c.1262C>T — Amish
Charcot-Marie-Tooth disease
GDAP1 c.692C>T — Amish
Non-syndromic deafness
GJB2 c.35delG — Amish and Mennonite
Deafness, autosomal recessive 1A
GJB2 c.101T>C
Hypomyelinating leukodystrophy
GJC2 c.203A>G — Amish
GM1-gangliosidosis
GLB1 c.902C>T — Amish
Non-ketotic hyperglycinemia
GLDC c.128delA — Amish
GLDC c.2186delC — Amish
Mucolipidosis II
GNPTAB c.732_733delAA — Mennonite
Usher-like syndrome
HARS c.1361A>C — Amish
Neurodevelopmental disorder with hypotonia, seizures, and absent language
HECW2 c.3572G>A
Intellectual disability, autosomal recessive 38
HERC2 c.1781C>T
Hereditary hemochromatosis
HFE c.845G>A — Amish
Tyrosinemia, type 3
HPD c.1005C>G — Mennonite
HPD c.479A>G — Mennonite
HPD c.85G>A — Mennonite
Lesch-Nyhan syndrome
HPRT1 c.485G>A
3-β-OH-steroid dehydrogenase deficiency
HSD3B2 c.35G>A — Amish
Intellectual disability, X-linked syndromic, Turner type
HUWE1 c.12389G>A — Amish
Orofacial clefting
HYAL2 c.443A>G — Amish
Ciliary dyskinesia, primary, 5
HYDIN c.2047G>T
Endocrine-cerebro-osteodysplasia
ICK c.815G>A — Amish
Severe combined immune deficiency
IL7R c.2T>G — Mennonite
Multisystem autoimmune disease with facial dysmorphism
ITCH c.394dupA — Amish
Glanzmann thrombasthenia
ITGA2B c.526C>G
Interstitial lung disease with nephrotic syndrome and epidermolysis bullosa
ITGA3 c.968A>G — Amish
Long QT syndrome 2
KCNH2 c.1897A>C — Amish
Bipolar spectrum disorder, susceptibility to
KCNH7 c.1181G>A — Amish and Mennonite
Long QT syndrome 1
KCNQ1 c.671C>T — Amish
Macrocephaly, neurodevelopmental delay, and seizures
KPTN c.776C>A — Amish
Cerebral cavernous malformations
KRIT1 c.47G>C — Mennonite
Poretti-Boltshauser syndrome
LAMA1 c.8556+1G>A — Amish
Pierson syndrome
LAMB2 c.440A>G — Mennonite
Intellectual disability, autosomal recessive 27
LINS1 c.1912G>T — Mennonite
Lipodystrophy, familial partial, type 6
LIPE c.3203_3221delTAGACGGGGGCTGCGGGGG
Dilated cardiomyopathy with AV block
LMNA c.568C>T — Amish
CODAS syndrome
LONP1 c.2161C>G — Amish
Deafness, autosomal recessive 77
LOXHD1 c.4480C>T
Osteoporosis-pseudoglioma syndrome
LRP5 c.1225A>G — Mennonite
LRP5 c.1275G>A — Mennonite
Autosomal recessive deafness-63
LRTOMT c.95_108delGGACCATGTCCCCT — Mennonite
3-methylcrotonylglycinuria
MCCC2 c.295G>C — Amish
MCCC2 c.517dupT — Mennonite
MCCC2 c.687A>C — Mennonite
Intellectual disability, autosomal recessive 44
METTL23 c.350_352delCAC — Mennonite
Waardenburg syndrome, type 2A
MITF c.1212G>A — Amish
McKusick-Kauffman syndrome
MKKS [c.250C>T + c.724G>T] — Amish
Methylmalonic aciduria and homocystinuria, cblC type
MMACHC c.271dupA — Amish
Trichothiodystrophy, nonphotosensitive 1
MPLKIP c.430A>G — Amish
Homocystinuria
MTHFR c.1129C>T — Amish
Spastic ataxia
MTPAP c.1432A>G — Amish
Mevalonate kinase deficiency
MVK c.1174G>A — Mennonite
MVK c.803T>C — Mennonite
Cardiomyopathy (dilated, hypertrophic, severe neonatal) and left ventricular non-compaction
MYBPC3 c.3330+2T>G — Amish
Usher syndrome, type 1B
MYO7A c.52C>T — Hutterite
Gray platelet syndrome
NBEAL2 c.881C>G — Mennonite
Mitochondrial complex I deficiency
NDUFA12 c.178C>T — Mennonite
NDUFA10 c.415C>T — Mennonite
Infantile mitochondrial complex II/III deficiency
NFS1 c.215G>A — Mennonite
Sensorineural hearing loss
NIN c.4666C>T — Amish
Crohn disease, susceptibility to
NOD2 c.3019dupC
Niemann-Pick disease, type C2
NPC2 c.325G>T — Amish
Nephrotic syndrome, type 1
NPHS1 c.1425_1428delCCTC — Mennonite
NPHS1 c.1481delC — Mennonite
NPHS1 c.3250delG — Mennonite
Nephrotic syndrome, type 2
NPHS2 c.413G>A — Amish
Familial focal epilepsy and focal cortical dysplasia
NPRL3 c.349delG — Mennonite
Congenital insensitivity to pain with anhidrosis
NTRK1 c.1501+1G>A — Mennonite
Albinism, oculocutaneous, type II
OCA2 c.823A>G — Mennonite
OCA2 c.2433G>T — Mennonite
X-linked intellectual disability-106
OGT c.1970C>T — Amish
Ornithine transcarbamylase deficiency
OTC c.422G>A — Amish
Deafness, autosomal recessive 9
OTOF c.2348delG
Osteogenesis imperfecta, type VIII
P3H1 c.1460C>T — Mennonite
Phenylketonuria
PAH c.1066-11G>A — Amish & Mennonite
PAH c.1199+17G>A — Amish
PAH c.284_286delTCA — Amish & Mennonite
PAH c.782G>A — Amish & Mennonite
Propionic acidemia
PCCB c.1606A>G — Amish and Mennonite
Deafness, autosomal recessive 23
PCDH15 c.3516+1G>A — Amish
Prolidase deficiency
PEPD c.793C>T — Amish
Zellweger syndrome
PEX26 c.292C>T — Amish
Polycystic kidney disease
PKD1 c.12138+2T>C — Amish
Pyruvate kinase deficiency
PKLR c.1436G>A — Amish
Pyruvate kinase deficiency of red cells
PKLR c.1529G>A
Colorectal cancer, hereditary nonpolyposis type 4
PMS2 c.2095G>C
Pancreatic lipase deficiency
PNLIP c.869G>A — Amish
Combined oxidative phosphorylation deficiency 13
PNPT1 c.1925_1927delTGG — Amish
Muscular dystrophy-dystroglycanopathy, type A, 1
POMT1 c.818C>T
Hemophagocytic lymphohistiocytosis, familial, 2
PRF1 c.1122G>A
Charcot-Marie-Tooth disease, type 4F
PRX c.2145T>A — Mennonite
phosphoserine aminotransferase deficiency
PSAT1 c.420G>A
Glycogen storage disease, type 6
PYGL c.1620+1G>A — Mennonite
Severe combined immune deficiency
RAG1 c.2974A>G — Amish
Immunodeficiency
RAG1 c.527G>T — Mennonite
Omenn syndrome
RAG2 c.1352G>C
Myasthenic syndrome, congenital, 11, associated with acetylecholine receptor deficiency
RAPSN c.264C>A
Pontocerebellar hypoplasia, type 6
RARS2 c.1516G>A — Mennonite
RARS2 c.1544A>G
Retinoblastoma
RB1 c.1981C>T — Mennonite
Cartilage-hair hypoplasia
RMRP n.71A>G — Amish
Microcephalic osteodysplastic primordial dwarfism, type 1
RNU4ATAC n.51G>A — Amish
Intellectual disability, aberrant behavior, hypotonia, and mild facial dysmorphism
RSRC1 and MLF1 81,324 bp deletion — Amish
Cerebral vasculopathy and early onset stroke
SAMHD1 c.1411-2A>G — Amish
Early infantile epileptic encephalopathy-6
SCN1A c.2665G>A — Amish
Epilepsy, generalized, with febrile seizures plus, type 1
SCN1B c.350G>A — Mennonite
Alpha-1 antitrypsin deficiency
SERPINA1 c.1096G>A — Amish and Mennonite
Plasminogen activator inhibitor 1 deficiency
SERPINE1 c.699_700dupTA — Amish
Limb-girdle muscular dystrophy
SGCB c.271C>T — Amish
SGCB c.452C>G — Amish
Charcot-Marie-Tooth disease type 4C
SH3TC2 c.2860C>T — Mennonite
Cystinuria
SLC7A9 c.313G>A
Gitelman syndrome
SLC12A3 c.1-1471_893del — Amish
SLC12A3 c.1924C>G — Amish
Salla disease
SLC17A5 c.115C>T — Mennonite
Amish microcephaly
SLC25A19 c.530G>C — Amish
Hypertrophic cardiomyopathy
SLC25A4 c.523delC — Mennonite
Cystinuria
SLC3A1 c.1354C>T — Mennonite
SLC3A1 c.1136+2T>C — Mennonite
Spherocytosis, type 4
SLC4A1 c.2422C>T
Glucose–galactose malabsorption
SLC5A1 c.1673G>A — Amish
Infantile parkinsonism-dystonia syndrome
SLC6A3 [c.1408T>A + c.1409A>G] — Amish
SLC6A3 c.1269+1G>A — Mennonite
Cystinuria
SLC7A9 c.1166C>T — Mennonite
SLC7A9 c.201C>T — Mennonite
Deafness and myopia
SLITRK6 c.1240C>T — Amish
Spinal muscular atrophy
SMN1 copy number — Amish & Mennonite
Neurodevelopmental disorder with microcephaly, arthrogryposis, and structural brain anomalies
SMPD4 c.462+1G>T
Symptomatic epilepsy and skull dysplasia
SNIP1 c.1097A>G — Amish
SORD-related neuropathy
SORD c.757delG— Amish
Peripheral demyelinating neuropathy, central dysmyelination, Waardenburg syndrome, and Hirschsprung disease
SOX10 c.748C>T — Mennonite
Troyer syndrome
SPART c.1110delA— Amish
Elliptocytosis 2
SPTA1 c.6154delG – Mennonite
Kahrizi syndrome
SRD5A3 c.176dupA
GM3 synthase deficiency
ST3GAL5 c.862C>T — Amish
STRADA deficiency
STRADA c.471-1974_1047+2194del — Mennonite
Glutaric aciduria, type 3
SUGCT c.895C>T — Amish
Spinocerebellar ataxia type 8
SYNE1 c.17905C>T — Amish
Intellectual disability, autosomal dominant 5
SYNGAP1 c.1526C>A — Amish
Intellectual disability, autosomal recessive
TAF11 c.464C>T — Mennonite
Holt-Oram syndrome
TBX5 c.474dupC — Amish
Pitt-Hopkins syndrome
TCF4 c.2033G>A — Amish
Tyrosine hydroxylase deficiency
TH c.698G>A — Mennonite
Primary torsion dystonia
THAP1 c.135_139delTAAACinsGGGTTTA — Amish
Familial hypercholanemia
TJP2 c.143T>C — Amish
Craniofacial dysmorphism, skeletal anomalies, and mental retardation syndrome
TMCO1 c.292_293delAG — Amish
Familial periodic fever
TNFRSF1A c.362G>A — Mennonite
Nemaline rod myopathy
TNNT1 c.538G>T — Amish
Torsion dystonia
TOR1A c.907_909delGAG — Mennonite
Thyroid dyshormonogenesis 2A
TPO c.2395G>A — Amish
Pontocerebellar hypoplasia
TSEN54 c.1220C>T — Mennonite
Sudden infant death with dysgenesis of the testes
TSPYL1 c.457dupG — Amish
Cardiomyopathy, familial hypertrophic 9
TTN c.59693G>A
Microcephaly with chorioretinopathy
TUBGCP6 c.5458T>G — Mennonite
Oculocutaneous albinism type IB
TYR c.1217C>T — Amish
Angelman syndrome
UBE3A c.2327A>C — Amish
Crigler-Najjar syndrome
UGT1A1 c.222C>A — Amish and Mennonite
Cohen syndrome
VPS13B c.9260dupT — Amish
von Willebrand disease
VWF c.4120C>T — Amish
Neurodevelopmental disorder, mitochondrial with abnormal movements and lactic acidosis and with or without seizures (NEMMLAS)
WARS2 c.161G>A
WARS2 c.37T>G
Galloway-Mowat syndrome
WDR73 c.888delT — Amish
Wolfram syndrome
WFS1 c.2015T>C — Amish
Failure to thrive, developmental delay, liver dysfunction, and abnormal subcortical white matter
YARS c.499C>A — Amish
Seizures, apnea, bradycardia, dystonia, nystagmus
ZDHHC16 c.4C>T — Amish
Spastic paraplegia-15
ZFYVE26 c.4114_4115insGAAGGGC — Amish
Restrictive dermopathy
ZMPSTE24 c.54_55insT — Mennonite
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Our clinic serves as a trusted medical practice for children and adults facing rare genetic disorders. Our dedicated team works every day to prevent and treat genetic illnesses. Our facility is in the heart of the Amish and Mennonite communities in Lancaster County. Inside is filled with cutting-edge gene sequencing tools that allow us to deliver highly personalized care—a precise treatment option for the right patient at the right time.