Gene = Dx Flashcards
ATP7b gene mutation
Wilson’s Disease
Connexin 26
Congenital non syndromic SNHL
- AD/AR/sporadic
- Accounts for 50%
CHD7
CHARGE syndrome
22q11 deletion
Di George
MECP2
Rett
ABCD1
Adrenoleukodystrophy
ATP7A
Menkes kinky hair
SMAD3, TGFB
Loeys-Dietz
CBS
Homocysteinuria
FBN1
Marfans
PKD1,2- polycystin
ADPKD
- PKD1 more severe/earlier
- Liver, pancreas cysts, Berry aneurysms
PKHD1- Fibrocystin
ARPKD
- Large cysts at birth
- Potter sequence
- Liver fibrosis
COL1A1/COL1A2
OI
- Fragile bones, blue sclera, deafness
- Also short stature
- Increased bone turnover
NLRP3 (CIAS1)
Cryopyrin Associated Periodic Syndromes
- Encodes cryopyrin
Mutations include:
- FCAS1
MVK
Hyper IgD syndrome (Dutch fever)
- AR
MEFV
Familial Mediterranean fever
- Most common, AR
- 1-3d fever + serositis, 20% amyloidosis
TNFR1
TRAPS
RAB27 alpha
Griscelli
Oculocutaneous albinism partial
Neutropenia & hypogamm
High risk HLH
LYST
Chediak Higashi
- Vesicular trafficking disorder (AR)
- Giant cytoplasmic granules in WBCs
- Oculocutaneous albinism, PN, neutropenia
- At risk H
NCCT (SLA12A3)
Gittelmans
- Low calcium, Na/Cl
- Decreased uptake from DCT
- Similar to thiazide diuretic
CLCN5 and
Dents
- Stones
OCRL1
Lowe’s Syndrome
- X-linked
- proteinuria, renal tubular acidosis (type 2), congenital cataracts, and developmental delay
- Similar to Dent’s
CYBB
CGD (X-linked)
RPS19
Diamond-Blackfan (AD)
SBDS
Swachmann-Diamond
CTC1
Coats plus
SMARCAL1
Schimke immunoosseous dysplasia
- Spondyloepiphyseal dysplasia
- Pigmentary skin changes/abnormal teeth
- Renal dysfunction
- Lymphopenia/impaired immunity
SALL1 gene
Miller syndrome?
TCOF1 gene
Treacher-Collins
ORC1 gene
Meier-Gorlin
GNAQ
Sturge Weber Syndrome
ATM
Ataxia Telangectasia
ADAM-TS13
TTP- abnormal protease
FANCA/BRCA1 and BRCA2
Fanconi anaemia
- DNA repair genes
- BM failure, higher risk of malignancy
- Dx: DNA fragility (chromosomal breakage study)
NF1
’’
NF2
’’
TSC1,2
Tuberous Sclerosis 1/2
ELN- 7q11
Williams
JAG1/NOTCH2
Alagille
COL5A
Ehlers Danlos
COL1A1/2
Osteogenesis imperfecta
COL2A1
Stickler Syndrome
EYA1
Brachio-oto-renal syndrome
RPS19 (25%)
Diamond Blackfan Anaemia
VHL
Von Hippel Lindau Syndrome
NIPBL/SMC1A
Cornelia De Lange Syndrome
PAX3/SOX10
Waardenburg Syndrome
RASMAPK/HRAS
Costello Syndrome
RASMAPK/- PTPN11, SOS1
Noonan Syndrome
RASMAPK/- KRAS
Cardiofasciocutaneous syndrome
TCOF1
Treacher-Collins Syndrome
SERPINA1
A1AT Deficiency
FGFR3
Achondroplasia
FGFR2
Apert
FGFR2
Crouzon
PKD1/2- polycystin
ADPKD
APC
Familial Adenomatous Polyposis
p53
Li Fraumeni
MEN1/RET
MEN1, MEN 2A & B
CMT1/PMPZZ
Charcot-Marie-Tooth
CHD7
CHARGE
UGT1A1
Gilbert
STK11
Peutz-Jeghers
DMPK
Myotonic dystrophy MD1
Autosomal dominant
- GTG triplet repeat
- Anticipation- maternal
CFTR
CF
CB5
Homocysteinuria
PKHD1- fibrocystin
ARPKD
HBA1/2
Thalassemia
HBB
Sickle cell anaemia
ITGA2B or ITGB3
Glanzman Thrombasthenia
DHCR7
Smith-Lemli-Opitz
ATM
Ataxia-Telangectasia
ARSA
Metachromatic Leukodystrophy
SMN1 5q11
SMA
HEXA/B
Tay-Sachs
RBM8A
TAR (thrombocytopenia absent radii)
FXN
Freidrich’s ataxia
UGT1A1
Crigler Najjar
DNAI1 and DNAH5
Kartageners/PKD
SGLT1/GLUT1
Gluc-galactose malabsorption
PAH
PKU
SCN1A
Dravet
MECP2
Rett
DEPDC5
mTOR pathway
- Familial focal epilepsy/cortical dysplasia
KCNQ2
- Potassium chanellopathy
- Common cause of benign familial neonatal epilepsy
- However can also present with severe encephalopathy
BRCA1
Tumor supressor in breast & ovarian Ca
MTOR
Tumor supressor
- Defects associated with Smith-Kingsmore syndrome
RB1
Tumor supressor
- Retinoblastoma
TP53
Li Fraumeni
- AD cancer syndrome
- soft tissue and haematological Ca: breast cancer, sarcomas, brain tumours, leukaemia
and adrenal gland tumours.
SRD5A2
5-Alpha Reductase Deficiency (46 XY DSD)
- ambiguous/female genitalia at birth
- masculinisation during puberty
- No gynaecomastia
Ix: normal testosterone/normal low DHT
- hight testosterone: DHT ratio
KCNQ1
LQTS1- males, exercise
KCNH2
LQTS2- females, startle
SCN5A
LQTS3- males, sleep
PTPN11, SOS1
Noonan- aberrant RAS-MAPK signalling
7q11.23
Williams
15q11-q13
Prader Willi
IFNAR1
Interferon receptor- vaccine/viral related illness
L2RG
X-linked severe
combined immunodeficiency
(SCID)
CYBB
chronic granulomatous disease
IKBKG
incontinentia pigmenti, ectodermal dysplasia with immune deficiency
RUNX1
Abnormal core binding factor- involved in haematopoesis
- increased risk of AML, T cell ALL, JIA and
RA
ETV6
Leukemia
NPRL3
mTOR pathway
-increased risk of focal cortical dysplasia and familial focal epilepsy with variable foci (FFEVF)
AIRE
APECED
- Loss of function mutation, no negative selection of self-reactive T-cells
3-5yrs:
* Mucocutaneous candidiasis
* Hypoparathyroidism
* Addison’s disease
BTK
X linked agammaglobulinaemia
>6mo:
* Absent lymphoid tissue
* Absent immunoglobulin production.
* Sinopulm, skin infections & giardia
RYR2 mutation (30%)
Catecholaminergic polymorphic ventricular
tachycardia (CPVT)
MYO5B
Myosin 5b mutations cause
microvillus inclusion disease
FIC1 protein
PFIC1
BSEP protein
PFIC2
MDR3 protein
PFIC 3
RB1 chromosome 13q
Retinoblastoma
C-myc proto-oncogene
Linked to Burkitts Lymphoma
SMARCB1 (loss of INI1)- 35% germline
Poor prognosis rhabdoid brain/kidney Ca
RB1
Retinoblastoma
- one hit =predisposed, 2hit = cancer
MYCN
Poor prognosis
Neuroblastoma
PHOX2
Central apnoea/hyperventilation syndrome
Neuroblastoma
PAX-FKHR/ t(1/2;13)
Alveolar rhabdomyosarcoma
- Worse prognosis
EWSR1. t(11;22)
Ewings Sarcoma
PMP22 gene- 17p11.2
CMT1A
- point or duplication mutation in PMP22 gene- encodes peripheral myelin
- Abnormal or expression/distribution of protein
Frataxin/FXN
Freidrich Ataxia
- GAA trinucleotide repeats
- Loss of function mutation
MPZ Chr 1q22
Peroneal muscular atrophy, now known as CMT1B
- Myelin protein zero
SPINK1 (serine peptidase inhibitor kazal type 1)
Hereditary pancreatitis
SPINK1 (serine peptidase inhibitor kazal type 1)
Hereditary pancreatitis
11p deletion
Loss of WT1 and PAX6
WAGR
Wilms tumour
Genitourinary anomalies
Aniridia
Retardation (Mental)
WT1 gene mutation also seen in Denys-Drash syndrome
p53
Li Fraumeni
Sarcomas
Adrenocortical carcinoma
Leukaemia
Gliomas
BR/bone/ lung / brain
PTEN
Cowden
THUG
Hamartomas
Non medullary thyroid CA
Uterine/ BRCA
Gangliocytoma (Lhermitte-Duclos)
Mucocutaneous lesions, macrocephaly,
APC
FAP (AD)
Colorectal
Thyroid
Hepatoblastoma
RecQ helicase
Bloom syndrome (AR)
RecQ helicase
Bloom syndrome (AR)
Leukaemia
Lymphoma
Solid tumours
Short stature, photosensitive telangiectatic erythema
SH2D1A
X linked immunodeficiency (Duncan syndrome)
Lymphoproliferative disorder
ELANE
Kostmann syndrome
Congenital neutropenia
Risk of myelodysplastic syndrome/ leukaemia