Von Hippel-Lindau Disease
- Chromosome 3
 - Hemangioblastomas
 - Medulla, Retina, Cerebellum
 - Cysts
 - Kidney, Liver, Pancreas
 - Develop Bilateral Renal Carcinomas
 - Pheochromocytomas
 
Renal Cell Carcinoma Characteristics
- Chromosome 3
 - VHL Gene
 - Proximal Convoluted Tubule
 - Smoking
 - Nephrolithiasis
 - Chronic Analgesic Use
 - Clear Cell
 - Papillary
 - Chromophobic
 
Autosomal Dominant Polycystic Kidney Disease
- Autosomal Dominant
 - Mutations in PKD1/2
 - Cystic Enlargement of Renal Tubules
 - Chronic Kidney Disease
 - Hypertension 
 - Mitral Valve Prolapse
 - Hepatic Cysts
 - Berry (Saccular) Aneurysms
 
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
 
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
 
Familial Adenomatous Polyposis
- Autosomal Dominant
 - Mutation in Chromosome 5
 - APC Gene Mutation
 - Overexpression of Beta-catenin
 - Two-Hit Hypothesis
 - Change in Bowel Habits
 - Colonic Polyps
 - Colonoscopy
 - Prophylactic Surgery
 - Progresses to Colorectal Carcinoma
 
Hemochromatosis Pathophysiology
- Hemosiderin Deposition
 - Autosomal Recessive
 - HLA-A3
 - Secondary to Transfusion Therapy
 - Increase Iron
 - Increase Ferritin
 - Increased Transferrin Saturation
 
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
 
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
 
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
 
Tuberous Sclerosis
- Autosomal Dominant
 - Hamartomas in CNS and Skin
 - Phakoma
 - Subependymal Giant Cell Astrocytoma
 - Seizures
 - Intellectual Disability (Mental Retardation)
 - Facial Angiofibroma (Adenoma Sebaceum)
 - Shagreen Patch
 - Ash-Leaf Spots
 - Renal Angiomyolipoma
 - Cardiac Rhabdomyoma
 
Wilms' Tumor (Nephroblastoma)
- Malignant Renal Tumor
 - Abdominal Mass
 - Hematuria
 - Fever
 - Hypertension
 - Nephrectomy
 - Chemotherapy
 - Radiation
 - Do Not Palpate Abdomen
 - Children Under 5 Years Old
 
Sickle Cell Anemia (Mechanism)
- Intrinsic Normocytic Hemolytic Anemia
 - Point Mutation
 - Autosomal Recessive
 - African American
 - Dehydration or Decreased O2
 - Newborns Asymptomatic
 - Heterozygote Malarial Resistance
 
Beta Thalassemia
- Microcytic, Hypochromic Anemia
 - Mediterranean Populations
 - Decreased  Beta-Globin
 - Increased HbA2
 - No Intervention
 - Blood Transfusions
 - Hemochromatosis
 - Crew-cut on Skull X-Ray
 - Electrophoresis
 
MEN 1 (Multiple Endocrine Neoplasia)
- Autosomal Dominant
 - Menin Mutation (Tumor Suppression Gene)
 - Chromosome 11
 - Pancreatic Endocrine Tumors
 - Pituitary Tumors
 - Parathyroid Adenomas
 
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)
 
Wilson's Disease Pathophysiology
- Autosomal Recessive
 - Mutation in ATP7B gene
 - Chromosome 13
 - Decrease in Ceruloplasmin
 - Inadequate copper excretion
 - Liver
 - Brain
 - Kidney
 - Cornea
 - Joints
 - Treat with Penicillamine
 
Retinoblastoma
- Loss of Heterozygosity
 - Chromosome 13
 - Children
 - Leukocoria
 - Strabismus
 - Vision Loss
 - Osteosarcoma
 - Genetic Testing
 - Cryotherapy
 - Photocoagulation
 - Chemotherapy or Radiation
 - Surgery
 
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
 
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
 
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)
 
Neurofibromatosis Type 1
- Autosomal Dominant
 - Chromosome 17
 - Neurofibromas
 - Optic Glioma
 - Lisch Nodules
 - Hamartomas
 - Cafe Au Lait Spots
 - Scoliosis
 - Pheochromocytoma
 
Li-Fraumeni Syndrome 
- Autosomal Dominant
 - TP53 Mutation
 - Loss of Heterozygosity
 - Osteosarcoma
 - Breast Cancer
 - Brain Tumors
 - Leukemia/Lymphoma
 - Adrenocortical Carcinoma
 - Supportive Care
 
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
 
Neurofibromatosis Type 2
- Autosomal-Dominant
 - Chromosome 22
 - Vestibular Schwannoma
 - Meningioma
 - Ependymoma
 - Cafe Au Lait Spots
 - Cataracts
 
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
 
Fragile X
- Trinucleotide Repeat
 - CGG Repeats
 - FMR1 Gene
 - X-linked Dominant
 - Developmental Delay
 - Autism
 - Large Ears
 - Large Jaw
 - Long Face
 - Macroorchidism
 
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)
 
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