Patau Syndrome
- Trisomy 13
 - Severe Intellectual Disability
 - Microcephaly
 - Holoprosencephaly
 - Microphthalmia
 - Polydactyly
 - Cleft Lip/Cleft Palate
 - Rocker Bottom Feet
 - Omphalocele
 - Cystic Kidneys
 - Ventricular Septal Defect (VSD)
 
Edwards Syndrome
- Trisomy 18
 - Intellectual Disability (Mental Retardation)
 - Rocker Bottom Feet
 - Ventricular Septal Defect (VSD)
 - Clenched Hands
 - Overlapping Fingers
 - Low-Set Ears
 - Micrognathia
 - Prominent Occiput
 - Omphalocele
 - Meckel's Diverticulum
 - Horseshoe Kidney
 - Malrotation of Intestines
 
Down Syndrome
- Trisomy 21
 - Meiotic Nondisjunction
 - Intellectual Disability (Mental Retardation)
 - Single palmar crease
 - Flat Facies
 - Duodenal Atresia
 - Hirschsprung's Disease
 - Septum Primum Type ASD
 - Endocardial Cushion Defects
 - Prominent Epicanthal Folds
 - Increased Risk of Acute Lymphoblastic Leukemia
 - Alzheimer's Disease
 
Myotonic Dystrophy
- Autosomal Dominant
 - Trinucleotide Repeat
 - CTG
 - Facial Muscle Weakness
 - Frontal Balding
 - Sustained Grip
 - Conduction Defects
 - Cataracts
 - Selective Atrophy of Type 1 Fibers
 - Testicular Atrophy
 
Fragile X
- Trinucleotide Repeat
 - CGG Repeats
 - FMR1 Gene
 - X-linked Dominant
 - Developmental Delay
 - Autism
 - Large Ears
 - Large Jaw
 - Long Face
 - Macroorchidism
 
Friedreich's Ataxia
- Trinucleotide Repeat
 - GAA Repeat
 - Frataxin
 - Mitochondrial Dysfunction
 - Autosomal Recessive
 - Hammertoes
 - High Arches
 - Kyphoscoliosis
 - Lateral Corticospinal Tract
 - Posterior Column
 - Spinocerebellar Tract
 - Type I Diabetes Mellitus
 - Hypertrophic Cardiomyopathy
 
Huntington's Disease
- Autosomal Dominant
 - Trinucleotide Repeat
 - CAG Repeats
 - Chromosome 4
 - Anticipation
 - Caudate
 - Decrease of ACh
 - Decrease of GABA
 - Chorea
 - Dementia
 - Depression
 - Glutamate Toxicity
 - Neuronal Death via NMDA Binding
 
Muscular Dystrophy
- X-linked Recessive
 - Muscle Weakness
 - Motor Problems
 - Gower Sign
 - Large Calves
 - Waddling Gait
 - Loss of Ambulation
 - Cardiac and Respiratory Failure
 
Angelman's Syndrome
- Paternal Imprinting
 - Deletion of Chromosome 15q (Maternal Deletion)
 - Happy Puppet Syndrome
 - Inappropriate Laughter
 - Ataxia
 - Severe Intellectual Disability (Mental Retardation)
 - Seizure
 - Abnormal EEG
 
Prader-Willi Syndrome
- Maternal Imprinting
 - Deletion of Chromosome 15q (Paternal Deletion)
 - Hyperphagia
 - Truncal Obesity
 - Hypogonadism
 - Undescended Testicles (Cryptorchidism)
 - Intellectual Disability (Mental Retardation)
 - Neonatal Hypotonia (Floppy Baby)
 - Almond Shaped Eyes
 - Narrow Bifrontal Diameter
 - Thin Upper Lip
 
Thymic Aplasia (DiGeorge Syndrome)
- DiGeorge Syndrome
 - 22q11 Deletion
 - Failure to Develop Third and Fourth Pharyngeal Pouches
 - Undeveloped Thymus
 - T Cell Deficiency
 - Recurrent Viral and Fungal Infections
 - Undeveloped Parathyroids
 - Hypocalcemia
 - Tetany
 - Aortic Defects
 - Congenital Heart Defects
 - Absent Thymic Shadow on CXR
 
Cri Du Chat
- Congenital Deletion of Short Arm of Chromosome 5p
 - High Pitched Cry/Mewing
 - Microcephaly
 - Hypotonia
 - Difficulty Sucking and Swallowing
 - Epicanthal Folds
 - Widely Spaced Eyes
 - Wide & Flat Nasal Bridge
 - High Arched Palate
 - Intellectual Disability 
 - Cardiac Abnormalities
 
Marfan Syndrome
- Fibrillin-1 Mutation
 - Autosomal Dominant
 - Tall
 - Arachnodactyly
 - Pectus Excavatum
 - Hypermobile Joints
 - Aortic Aneurysm And Dissection
 - Mitral Valve Prolapse (MVP)
 - Subluxation of Lens (Superior)
 
Williams Syndrome
- Microdeletion Of Long Arm Of Chromosome 7
 - Elastin Gene
 - Elfin Facies
 - Intellectual Disability 
 - Extreme Friendliness with Strangers
 - Well Developed Verbal Skills
 - Cardiovascular Problems
 - Hypercalcemia
 - Increased Sensitivity To Vitamin D
 
Ehlers-Danlos Syndrome Types
- Types 1 and 2 - Classical
 - Type V Collagen Mutation
 - Joints and Skin
 - Type 3 - Hypermobility
 - Most Common
 - Tenascin X Deficiency
 - Joint Instability
 - Type 4 - Vascular
 - Type III Collagen Mutation
 - Vascular and Organ Rupture
 
Ehlers-Danlos Syndrome Disease
- Faulty Collagen Synthesis
 - Autosomal Dominant or Recessive
 - Various Severities
 - Hypermobile Joints
 - Hyperextensible Skin
 - Easy Bruising/Bleeding
 - Berry (Saccular) Aneurysm
 - Brighton Criteria
 
Essential Fructosuria
- Autosomal Recessive
 - Defect in fructokinase
 - Fructose to fructose 1-P
 - Benign
 - Fructose appears in blood and urine
 - Fructose does not enter cells
 
Fructose Intolerance
- Deficiency of Aldolase B
 - Fructose 1-P To DHAP And GA
 - Accumulation Of Fructose-1-Phosphate
 - Inhibition Of Glycogenolysis
 - Inhibition Of Gluconeogenesis
 - Hypoglycemia
 - Vomiting
 - Jaundice
 - Cirrhosis
 - Autosomal Recessive
 
Classic Galactosemia
- Autosomal Recessive
 - Galactose-1-phosphate uridyltransferase is Absent (GALT)
 - Impaired Galactose-1-P to UDP-Galactose
 - Galactitol Accumulation in Lens
 - Infantile Cataracts
 - Failure to Thrive
 - Hepatomegaly
 - Jaundice
 - Intellectual Disability 
 - Increased Risk E. Coli Sepsis
 
Galactokinase Deficiency
- Autosomal Recessive
 - Galactose to Galactose 1P
 - Galactose Appears in Blood and Urine
 - Benign
 - Infantile Cataracts
 - Failure to Develop a Social Smile
 
Alkaptonuria
- Autosomal Recessive
 - Deficiency of homogentisic acid oxidase
 - In degradative pathway of tyrosine to fumarate
 - Homogentisic acid harmful to cartilage
 - Arthritis
 - Dark Connective Tissue
 - Urine turns black on standing
 
Hartnup Disease
- Autosomal Recessive
 - Defective Sodium-Dependent Transporter
 - Neutral Amino Acids
 - Renal and Intestinal Cells
 - Tryptophan Deficiency
 - Impaired Synthesis of Niacin
 - Pellagra-Like Symptoms
 - Diarrhea
 - Dermatitis
 - Dementia
 - Ataxia
 - Neutral Aminoaciduria
 - High-Protein Diet
 - Niacin Supplementation
 
Phenylketonuria (PKU)
- Decreased Phenylalanine Hydroxylase
 - Decreased Tetrahydrobiopterin Cofactor
 - Autosomal Recessive
 - Tyrosine Becomes Essential
 - Phenylalanine Found in Nutrasweet
 - Musty or Mousy Body Odor
 - Growth Retardation
 - Seizures
 - Intellectual Disability
 - Hypopigmentation
 
Maternal Phenylketonuria
- Lack of Proper Diet During Pregnancy; Like NutraSweet
 - Congenital Heart Defects
 - Growth Retardation
 - Intellectual Disability (Mental Retardation)
 - Microcephaly
 
Maple Syrup Urine Disease
- Defect in alpha ketoacid dehydrogenase
 - Blocked degradation of branched chain amino acids
 - Leucine
 - Isoleucine
 - Valine
 - Seizures
 - Intellectual Disability
 
Pyruvate Dehydrogenase Deficiency
- X-Linked
 - Acquired from Thiamine Deficiency
 - Backup of Alanine and Pyruvate
 - Neurologic Defects
 - Lactic Acidosis
 - Ketogenic Nutrients
 - Lysine and Leucine (Ketogenic Nutrients)
 
Ornithine Transcarbamylase Deficiency
- Most Common Urea Cycle Disorder
 - X-Linked Recessive
 - Hyperammonemia
 - Decreased BUN
 - Carbamoyl Phosphate is Converted to Orotic Acid
 - Pyrimidine Synthesis Pathway
 - Evident in Babies
 
Cystinuria
- Defect of Renal Tubular Amino Acid Transporter
 - C-O-L-A Acronym
 - Cystine
 - Ornithine
 - Lysine
 - Arginine
 - Excess Cystine in Urine
 - Hexagonal Crystals
 - Staghorn Kidney Stones
 - Cyanide Nitroprusside Test
 - Acetazolamide to Alkalinize the Urine
 
Orotic Aciduria
- Autosomal Recessive
 - Defect in UMP Synthase
 - De Novo Pyrimidine Synthesis Pathway
 - Increased Orotic Acid in Urine
 - Megaloblastic Anemia
 - No Response to B12 or Folate
 - Non-Hyperammonemic
 - Failure to Thrive
 - Oral Uridine Monophosphate
 
Hyperammonemia
- Hereditary Urea Cycle Defects
 - Acquired Through Liver Disease
 - Bacterial Overgrowth in Gut
 - GI Bleeding
 - Inhibits the Citric Acid Cycle
 - Somnolence
 - Slurring of Speech
 - Tremor
 - Cerebral Edema
 - Blurring of Vision
 - Vomiting
 - Limit Protein In Diet
 - Lactulose
 - Rifaximin
 - Sodium Benzoate
 - Phenylbutyrate
 
Homocystinuria
- Autosomal Recessive
 - 4 Forms
 - Cystathionine Synthase Deficiency
 - Decreased Affinity of Cystathionine Synthase For Vitamin B6
 - Methionine Synthase Deficiency
 - Methylenetetrahydrofolate Reductase (MTHFR) Deficiency
 - Marfanoid Body Habitus
 - Kyphosis
 - Lens Subluxation (Inferior)
 - Intellectual Disability 
 - Atherosclerosis
 - Dietary Deficiencies Can Elevate Homocysteine Levels
 
G6PD Mechanism
- Turns NADP+ to NADPH
 - NADPH Used by Glutathione Reductase
 - Detoxifies Free Radicals and Peroxides
 - X-linked Recessive
 
G6PD Deficiency
- X-linked Recessive
 - Hemolytic Anemia
 - Inflammatory Response
 - Fava Beans
 - Sulfonamides
 - Primaquine
 - Anti TB Drugs
 - Heinz Bodies
 - Bite Cells
 - Prevalent Among African Americans due to Increased Malarial Resistance
 
Adenosine Deaminase Deficiency
- Adenosine to Inosine
 - Excess ATP
 - Inhibition of Ribonucleotide Reductase
 - Prevents DNA Synthesis
 - Decreases B Cells and T Cells
 - Major cause of SCID
 
Lesch-Nyhan Syndrome
- X-linked Recessive
 - Absence of HGPRT
 - Hypoxanthine to IMP
 - Guanine to GMP
 - PRPP is Increased
 - Excess Uric Acid
 - Gout
 - Intellectual Disability
 - Self-mutilation
 - Choreoathetosis
 - Allopurinol
 - Febuxostat
 
Von Gierke Disease
- Autosomal Recessive
 - Type I Glycogen Storage Disease
 - Glucose-6-Phosphatase Deficiency
 - Increased Glycogen in Liver
 - Hepatomegaly
 - Enlarged Kidneys
 - Severe Fasting Hypoglycemia
 - Increased Triglycerides
 - Increased Uric Acid (Gout)
 - Increased Lactic Acid
 - Doll-like Facies
 - Continuous Oral Glucose (or Cornstarch)
 - Avoid Fructose and Galactose
 
Pompe Disease
- Type II Glycogen Storage Disease
 - Autosomal Recessive
 - Deficiency of Lysosomal Alpha 1,4 Glucosidase
 - Acid Maltase
 - Hypertrophic Cardiomyopathy
 - Hepatomegaly
 - Macroglossia
 - Hypotonia
 - Increased Glycogen within Lysosomes
 - Increased Lactate Dehydrogenase (LDH)
 - Increased Creatine Kinase (CK/CPK)
 
Cori Disease
- Type III Glycogen Storage Disease
 - Deficiency of Alpha 1, 6 Glucosidase
 - Debranching Enzyme
 - Limit-Dextrin Accumulation (In Cytosolic Structures)
 - Hypoglycemia
 - Muscle Weakness
 - Hypotonia
 - Stunted Growth
 - Hepatomegaly
 - Normal Blood Lactic Acid Levels
 - Gluconeogenesis Intact
 - Increased LFT's
 - Increased Creatine Kinase (CK/CPK)
 - Continuous Feeding
 - High Protein Diet
 - Cornstarch (Uncooked)
 
McArdles Disease
- Type V Glycogen Storage Disease
 - Muscle Glycogen Phosphorylase Deficiency
 - Increased Glycogen in Muscle
 - Painful Muscle Cramps
 - Myoglobinuria
 - Normal Lactic Acid
 - Vitamin B6
 
Fabry's Disease
- X-linked Recessive
 - Alpha-galactosidase A Deficiency
 - Increased Ceramide trihexoside
 - Decreased Sweating (Hypohidrosis)
 - Angiokeratoma
 - Episodic Peripheral Neuropathy
 - Cardiovascular Disease
 - Renal Failure
 
Hunter Syndrome
- X-linked Recessive
 - Mucopolysaccharidoses
 - Iduronate Sulfatase Deficiency
 - Increased Dermatan Sulfate
 - Increased Heparan Sulfate
 - No Corneal Clouding
 - Aggressive Behavior
 
Niemann-Pick Disease
- Autosomal Recessive
 - Sphingomyelinase Deficiency
 - More Common in Ashkenazi Jewish Population
 - Cherry Red Spot on Macula
 - Hepatosplenomegaly
 - Neurodegeneration
 - Foam Cells
 
Hurler Syndrome
- Autosomal Recessive
 - Mucopolysaccharidoses
 - Alpha-L-Iduronidase Deficiency
 - Increased Heparan Sulfate
 - Increased Dermatan Sulfate
 - Hepatosplenomegaly
 - Developmental Delay
 - Gargoylism
 - Corneal Clouding
 - Airway Obstruction
 
Tay-Sachs Disease
- Autosomal Recessive
 - Hexosaminidase A Deficiency
 - Increased GM2 Ganglioside
 - More Common in Ashkenazi Jewish Population
 - Cherry Red Spot on Macula
 - Neurodegeneration
 - Developmental Delay
 - Onion Skin Lysosomes
 
Krabbe Disease
- Autosomal Recessive
 - Galactocerebrosidase Deficiency
 - Increased Psychosine
 - Developmental Delay
 - Peripheral Neuropathy
 - Optic Atrophy
 - Globoid Cells
 
Gauchers Disease
- Autosomal Recessive
 - Beta Glucocerebrosidase Deficiency
 - Lipid-laden Macrophages
 - Crumpled Tissue Paper
 - Osteoporosis
 - Bone Crises
 - Aseptic Necrosis of Femur
 - Erlenmeyer Flask Deformity
 - Hepatosplenomegaly
 - Pancytopenia
 
Metachromatic Leukodystrophy
- Autosomal Recessive
 - Arylsulfatase A Deficiency
 - Increased Cerebroside Sulfate
 - Demyelination
 - Ataxia
 - Dementia
 
I-cell Disease (Inclusion Cell Disease)
- Mucolipidosis II
 - Autosomal Recessive
 - Defective N-acetylglucosaminyl-1-phosphotransferase
 - Absent Mannose-6-Phosphate on Glycoproteins
 - Accumulation of Lysosomal Debris
 - Corneal Clouding
 - Coarse Facies
 - Skeletal Abnormalities
 - Gingival Hyperplasia
 - Increased Plasma Lysosomal Enzymes
 - Inclusion Bodies
 - Cardiorespiratory Complications
 - Poor Prognosis
 
Cystic Fibrosis Mechanisms
- Autosomal Recessive
 - CFTR Chromosome 7
 - Cl- channel Defect
 - Decreased Chloride Secretion
 - Increased Na and Water Reabsorption
 - Increased Na and Cl in Sweat
 - Dehydration of Mucous Layers
 
Cystic Fibrosis Symptoms and Complications
- Recurrent Pulmonary Infections
 - Chronic Bronchitis
 - Nasal Polyps
 - Pancreatic Insufficiency
 - Intestinal Obstruction
 - Malabsorption and Diarrhea
 - Vitamin Deficiencies
 - Chronic Hepatic Disease
 - Infertility in Males
 
Cystic Fibrosis Diagnosis and Treatment
- Sweat Chloride Test > 60 mmol/L
 - Meconium Ileus
 - N-acetylcysteine
 - Antibiotic Prophylaxis
 - Pulmonary Maintenance
 - Lung Transplant
 - Vitamin Replacement
 
Osteogenesis Imperfecta
- Autosomal Dominant
 - Decreased Type I Collagen Production
 - Phenotypically Diverse
 - Brittle Bone Disease
 - Fractures from Minimal Trauma
 - Confused with Child Abuse
 - Hearing Loss
 - Dental Imperfections
 - Blue Sclera
 
Von Hippel-Lindau Disease
- Chromosome 3
 - Hemangioblastomas
 - Medulla, Retina, Cerebellum
 - Cysts
 - Kidney, Liver, Pancreas
 - Develop Bilateral Renal Carcinomas
 - Pheochromocytomas
 
Achondroplasia
- Autosomal Dominant
 - Advanced Paternal Age
 - Most Common Cause of Dwarfism
 - Mutation of FGFR3 (Fibroblast Growth Factor Receptor 3)
 - Defective Endochondral Ossification
 - Delayed Motor Milestones
 - Shortened Limbs with Normal Axial Skeleton Size
 - May Develop Hydrocephalus
 - Symptoms of Spinal Stenosis
 - Normal Life Span and Fertility
 
Bruton's Agammaglobulinemia
- X-linked Recessive
 - Defective Bruton Tyrosine Kinase
 - Blocks B Cell Maturation
 - Decreased Immunoglobulins of All Classes
 - Bacterial Infections After Six Months
 - Maternal IgG Protects Before Six Months
 
Klinefelter's Syndrome
- Male (XXY)
 - Eunuchoid Body Shape
 - Gynecomastia and Female Hair Distribution
 - Testicular Atrophy
 - Dysgenesis of Seminiferous Tubules
 - Possible Developmental Delay
 - Hypogonadism
 - Decreased Inhibin B
 - Increased FSH
 - Abnormal Leydig Cell Function
 - Decreased Testosterone
 - Increased LH
 - Increased Estrogen
 - Barr body (inactivated X chromosome)
 
Neurofibromatosis Type 1
- Autosomal Dominant
 - Chromosome 17
 - Neurofibromas
 - Optic Glioma
 - Lisch Nodules
 - Hamartomas
 - Cafe Au Lait Spots
 - Scoliosis
 - Pheochromocytoma
 
Neurofibromatosis Type 2
- Autosomal-Dominant
 - Chromosome 22
 - Vestibular Schwannoma
 - Meningioma
 - Ependymoma
 - Cafe Au Lait Spots
 - Cataracts
 
Leber Hereditary Optic Neuropathy
- Mitochondrial Disease
 - Optic Atrophy
 - Adolescent Males
 - Painless Vision Loss
 
MELAS
- Mitochondrial Disease
 - Mitochondrial Encephalomyopathy
 - Lactic Acidosis
 - Stroke-like Episodes
 - Muscle Weakness
 - Seizures
 
Kartagener Syndrome (Primary Ciliary Dyskinesia)
- Autosomal Recessive
 - Immotile Cilia Due to a Dynein Arm Defect
 - Decreased Male and Female Fertility
 - Immotile Sperm
 - Dysfunctional Fallopian Tube Cilia
 - Increased Risk of Ectopic Pregnancy
 - Bronchiectasis
 - Recurrent Sinusitis
 - Chronic Ear Infections
 - Conductive Hearing Loss
 - Situs Inversus (Dextrocardia on Chest X-Ray)
 - Decreased Nasal Nitric Oxide Used as Screening Test
 
Rett Syndrome
- Sporadic Neurological Disorder
 - De Novo Mutation of MECP2 on X Chromosome
 - Seen Almost Exclusively In Girls
 - Affected Males Die in Utero or Shortly After Birth
 - Symptoms Usually Appear Between Ages 1-4
 - Developmental Regression
 - Motor Impairment
 - Intellectual Disability (Mental Retardation)
 - Loss of Verbal Abilities
 - Seizure
 - Stereotyped Hand Wringing
 - Decelerated Head Growth (Microcephaly)
 - Breathing Problems
 - Ataxia
 
Dysbetalipoproteinemia (Type III Familial Dyslipidemia)
- Autosomal Recessive
 - Defective Apolipoprotein E (Apo E)
 - Increased Chylomicrons
 - Increased VLDL
 - Premature atherosclerosis
 - Tuberoeruptive xanthomas
 - Palmar xanthomas
 
Hypertriglyceridemia (Type IV Familial Dyslipidemia)
- Autosomal Dominant
 - Hepatic Overproduction of VLDL
 - Related to Insulin Resistance
 - Increased VLDL
 - Increased Triglycerides (> 1000 mg/dL)
 - Acute Pancreatitis
 - Eruptive Xanthomas
 - Increased Risk for Coronary Artery Disease (CAD)
 - Increased Risk of Peripheral Vascular Disease
 
Hyperchylomicronemia (Type I Familial Dyslipidemia)
- Autosomal Recessive
 - Lipoprotein Lipase Deficiency (LPL)
 - Altered Apolipoprotein C-II (Apo C-II)
 - Increased Chylomicrons
 - Increased Cholesterol
 - Increased Triglycerides
 - Pancreatitis
 - Hepatosplenomegaly
 - No Increased Risk for Atherosclerosis
 - Eruptive/Pruritic Xanthomas
 - Milky White Appearance of Blood When Drawn
 
Familial Hypercholesterolemia (Type IIa Familial Dyslipidemia)
- Autosomal Dominant
 - Defective or Absent LDL Receptors
 - Defective Apolipoprotein B-100 (ApoB-100)
 - Increased LDL
 - Decreased HDL
 - Type IIb also has Increased VLDL
 - Accelerated Atherosclerosis
 - Achilles Tendon Xanthomas
 - Xanthelasma
 - Corneal Arcus
 
Abetalipoproteinemia
- Autosomal Recessive
 - Deficiency of Apolipoproteins B-48 and B-100
 - MTTP Gene Mutation
 - Malabsorption
 - Steatorrhea
 - Failure to Thrive
 - Ataxia
 - Retinitis Pigmentosa
 - Spinocerebellar Degeneration
 - Lipid-Laden Enterocytes
 - Acanthocytes
 - Decreased Cholesterol and LDL
 - Vitamin E (Alpha-Tocopherol)
 
Retinitis Pigmentosa
- Hereditary Retinal Degeneration
 - Night Blindness
 - Contrast and Color Defects
 - Tunnel Vision
 - Abetalipoproteinemia
 - Kearns-Sayre Syndrome
 - Refsum Disease
 - Bone Spicule-shaped Retinal Deposits
 - Permanent Blindness
 
Kearns-Sayre Syndrome
- Mitochondrial Disease
 - Ophthalmoplegia
 - Retinitis Pigmentosa
 - Heart Block
 
Xeroderma Pigmentosum
- Defective Nucleotide Excision Repair
 - Pyrimidine Dimer Accumulation
 - Autosomal Recessive
 - Susceptible to UVA and UVB Rays
 - Actinic Keratosis
 - Neurodegeneration
 - Photosensitivity
 - Corneal Ulcers
 - Hyperpigmented Lentigines
 - Increased Risk of Skin Cancer
 
Adrenoleukodystrophy
- X-linked Recessive
 - Peroxisome Dysfunction
 - ABCD1 Mutation
 - Adrenal Insufficiency
 - Leukoencephalopathy
 - Testicular Insufficiency
 - Increased Very Long-chain Fatty Acids (VLCFA)
 - Demyelination
 - Genetic Testing
 - Lorenzo's Oil
 - Hematopoietic Stem Cell Transplantation
 
Hyperlipoproteinemia (Type V Dyslipidemia)
- Increased Cholesterol
 - Increased VLDL
 - Increased Chylomicrons
 - Increased Triglycerides
 - Increased Risk of Cardiovascular Disease
 - Xanthomas
 - Acute Pancreatitis
 - Lipid Panel
 - Lifestyle Changes
 - Statins
 - Fibrates
 
Type I Spinal Muscular Atrophy
- Lower Motor Neuron Disease
 - SMN1 Mutation
 - Degeneration of Anterior Horn Cells
 - Autosomal Recessive
 - Symmetric Flaccid Paralysis
 - Hypotonia
 - Bulbar Palsy
 - Extraocular Muscle Sparing
 - Respiratory Failure
 - Genetic Testing
 - Supportive Therapy
 - Nusinersen
 
MERRF Syndrome
- Mitochondrial Disease
 - Oxidative Phosphorylation Dysfunction
 - Young Adults
 - Myoclonic Epilepsy
 - Dementia
 - Ataxia
 - Ragged Red Fibers
 
Refsum Disease
- Autosomal Recessive
 - Peroxisome Dysfunction
 - Increased Phytanic Acid
 - Retinitis Pigmentosa
 - Hearing Loss
 - Polyneuropathy
 - Anosmia
 - Ataxia
 - Genetic Testing
 - Dietary Changes
 - Plasmapheresis
 
Li-Fraumeni Syndrome 
- Autosomal Dominant
 - TP53 Mutation
 - Loss of Heterozygosity
 - Osteosarcoma
 - Breast Cancer
 - Brain Tumors
 - Leukemia/Lymphoma
 - Adrenocortical Carcinoma
 - Supportive Care
 
Zellweger Syndrome
- Peroxisome Dysfunction
 - Autosomal Recessive
 - PEX Gene Mutation
 - Hypotonia
 - Seizures
 - Hepatomegaly
 - Polycystic Kidney Disease
 - Increased Very Long-chain Fatty Acids (VLCFA)
 - Supportive Care
 - Poor Prognosis