Rapid Review Classic Presentations Flashcards
Lesch-Nyhan syndrome (HGPRT deficiency, X-linked recessive)
Gout, intellectual disability, self-mutilating behavior in a boy
Osteogenesis imperfecta (type I collagen defect)
Blue sclera, multiple fractures, dental problems, conductive hearing loss
Ehlers-Danlos syndrome (type V collagen defect, type III collagen defect seen in vascular subtype of ED)
Elastic skin, hypermobility of joints, bleeding tendency
Marfan syndrome (fibrillin defect)
Arachnodactyly, lens dislocation (upward and temporal), aortic dissection, hyperflexible joints
Homocystinuria
Arachnodactyly, pectus deformity, lens dislocation (downward)
Cystic fibrosis (CFTR gene defect, chromosome 7, ∆F508)
Meconium ileus in neonate, recurrent pulmonary infections, nasal polyps, pancreatic insufficiency, infertility/subfertility
Muscular dystrophy (most commonly Duchenne, due to X-linked recessive frameshift mutation of dystrophin gene)
Calf pseudohypertrophy
Duchenne muscular dystrophy (Gowers sign)
Child uses arms to stand up from squat
Becker muscular dystrophy (X-linked non-frameshift deletions in dystrophin; less severe than Duchenne)
Slow, progressive muscle weakness in boys
Down syndrome
Single palmar crease, intellectual disability
Wet beriberi (thiamine [vitamin B1] deficiency)
Dilated cardiomyopathy/high-output heart failure, edema, alcoholism or malnutrition
Vitamin B 5 deficiency
Burning feet syndrome
Pellagra (niacin [vitamin B3 ] deficiency)
Dermatitis, dementia, diarrhea
Scurvy (vitamin C deficiency: can’t hydroxylate proline/ lysine for collagen synthesis); tea and toast diet
Swollen gums, mucosal bleeding, poor wound healing, petechiae, corkscrew hairs, perifollicular hemorrhages
Rickets (children), osteomalacia (adults); vitamin D deficiency
Bowlegs (children), bone pain, and muscle weakness
Vitamin K deficiency
Hemorrhagic disease of newborn with PT, aPTT
Phenylketonuria
Intellectual disability, musty body odor, hypopigmented skin, eczema
Alkaptonuria (homogentisate oxidase deficiency)
Bluish-black connective tissue, ear cartilage, sclerae; urine turns black on prolonged exposure to air
Tay-Sachs (ganglioside accumulation; no hepatosplenomegaly); Niemann-Pick disease
“Cherry-red spots” on macula
Familial hypercholesterolemia ( LDL receptor signaling)
Achilles tendon xanthoma
Scarlet fever (sandpaper rash); Kawasaki disease (lymphadenopathy, high fever for 5 days)
“Strawberry tongue”
Waterhouse-Friderichsen syndrome (meningococcemia)
Adrenal insufficiency, fever, bilateral adrenal hemorrhage
Klebsiella pneumoniae pneumonia
Red “currant jelly” sputum in patients with alcohol overuse or diabetes
Jarisch-Herxheimer reaction (due to host response to sudden release of bacterial antigens)
Fever, chills, headache, myalgia following antibiotic treatment for syphilis
Congenital toxoplasmosis
Chorioretinitis, hydrocephalus, intracranial calcifications
Hookworm (Ancylostoma spp, Necator americanus)
Pruritus, serpiginous rash after walking barefoot
Measles
Fever, cough, conjunctivitis, coryza, diffuse rash
Koplik spots (measles [rubeola] virus)
Small, irregular red spots on buccal/lingual mucosa with blue-white centers
Aortic regurgitation
Bounding pulses, wide pulse pressure, diastolic heart murmur, head bobbing
Aortic stenosis
Systolic ejection murmur (crescendo-decrescendo), narrow pulse pressure, pulsus parvus et tardus
Beck triad of cardiac tamponade
Distant heart sounds, distended neck veins, hypotension
Janeway lesions (infective endocarditis, septic emboli/ microabscesses)
Painless erythematous lesions on palms and soles
Infective endocarditis
Splinter hemorrhages in fingernails
Roth spots (infective endocarditis)
Retinal hemorrhages with pale centers