ABEM Recert Exam pt. 4 Flashcards
Macule: Definition
<1 cm, non-palpable
Papule: Definition
<1cm, palpable
Patch: Definition
> 1cm, non-palpable
Plaque: Definition
> 1cm, palpable
Vesicle: Definition
<1cm papule with clear fluid
Bullae: Definition
> 1cm plaque filled with clear fluid
What conditions is Nikolski’s sign seen with?
SSSS, TEN/SJS, Pemphigus Vulgaris
Bullous pemphigoid vs Pemphigus vulgaris: How to diff?
Bullous pemphigoid doesn’t have Nikolski’s sign
HUS-TTP: Rx
Exchange transfusion
NO PLATELETS, since it’s a consumptive process
Bullous pemphigoid and Pemphigus vulgaris: Appearance
Large, flat bullae
Leptosporosis: How is it transmitted?
Through contact with urine in a contaminated water source (e.g. exposure as a cattle rancher or through recreation in water)
Babesiosis: si/sx
Similar to malaria
Babesiosis: Geographic distribution
Found in New England
Babesiosis: Pathophysiology
Intracellular parasite which infects RBCs
Yersinia pestis (plague): Appearance
Patients have a bubo (infected, tender, swollen lymph node)
Tularemia: Geographic distribution
Found world-wide, but often in California on board questions
Tularemia: Reservoir, vector and how it’s spread
Reservoir = Rabbits
Vector = Fleas / ticks
Can’t be spread human to human
Tinea: Rx
Must use oral antifungal if involves hair or nails, otherwise can use topical
SJS/TEN vs SSSS: How to diff?
SSSS usually doesn’t have mucous membrane involvement
SJS/TEN: Typical cause
Medications (often sulfa or antiepileptic)
Hemophilia A: Cause
Factor 8 deficiency
Hemophilia B: Cause
Factor 9 deficiency (Christmas disease)
Will PT, PTT, or both be abnormal in hemophilia?
Only PTT is abnormal
von Willebrand’s disease: Rx
DDAVP for mild disease
Factor 8 for severe disease
ITP: Rx
Steroids
NO platelets
TTP: si/sx
FAT-RN Fever Anemia Thrombocytopenia Renal involvement Neurologic changes
TTP: Rx
Plasma exchange transfusion
Steroids
NO platelets
Microcytic anemia: Causes
Lead
Iron deficiency
Sideroblastic
Thalassemia
Normocytic anemia: Causes
Decreased production of normal RBCs (anemia of chronic disease, aplastic anemia)
Destruction of normal RBCs (hemolysis, blood loss)
Uncompensated increase in plasma volume (pregnancy, fluid overload)
Macrocytic anemia: Causes
Alcohol
B12/Folate deficiency
COPD
G6PD
AML vs CLL: How to diff
AML usually dosen’t have lymphadenopathy, CLL usually does
CLL always has increased WBCs, AML may have low, normal, or high WBCs
Optic neuritis: si/sx
Eye pain
Blurred vision
APD
Is unilateral, never bilateral
Normal ESR: How to calculate
(age + 10) / 2
Encephalitis: Definition
Fever
Headache
Neurologic changes
Encephalitis: MRI findings
Edema and/or hemorrhage in temporal lobe
Epidural abscess: Causative agent
Most are Staph aureus
Encephalitis: CSF findings
Increased protein
Guillane Barre syndrome: Most common preceding infection
Camplobacter jejuni
Myasthenia gravis: Pathophysiology
Antibodies form against postsynaptic ACh receptors
Myasthenia gravis vs organophosphate poisoning: How to diff
MG gets better with edrophonium (Tension)
Organophosphate gets worse
Organophosphate poisoning: Pathophysiology
Excess cholinesterase inhibitor which causes functional decrease in ACh
Pseudotumor cerebreri: What is typical opening pressure?
> 25 cm H2O
Febrile seizures: Ages affected
6 mo - 6 yo (but usually 12-18 months)
Primary CNS tumors: What type are most?
50% are gliomas
Tumors which met to brain
Lung > Breast > Melanoma
Hiccups: Rx
Thorazine
Boerhaave’s sydrome: Pathophysiology
Full-thickness esophageal tear
Narrowest part of esophagus
Kids = C6 criccopharyngis muscle Adults = T11 GE junction
How to tell if a coin is in esophagus or trachea?
Flat in AP projection = esophagus
Thin line in AP projection = trachea
Flat in sagital / cross section view = trachea
Hepatic encephalopathy: precipitants / causes
LIVER Librium Infection Volume loss Electrolyte disorders RBCs in gut (GI bleed)
What does IgM indicate?
Acute infection
What does Anti HBS indicate?
Patient is not infectious
What does HBS antigen indicate?
Patient is infectious
What does Anti HBc indicate?
Patient has low levels of infectivity
What does HBAg indicate?
Patient has high levels of infectivity
What does HBCAb (Hep B core Ab) indicate?
Previous Hep B infection
Ascending cholangitis: si/sx
Charcot’s triad
- Fever
- RUQ abd pain
- Jaundice
Reynold’s pentad adds
- Hypotension
- Altered MS
Pancreatitis: xray findings
Colon cut off sign (abrupt cut off of colon near left side of abdomen on KUB)
Sentinal loop (air fluid levels near pancreas on KUB)
Ranson’s criteria
GA-LAW Glucose > 200 AST > 250 LDH > 350 Age > 55 WBC > 16,000
<3 = mild disease 3+ = severe disease
Malrotation with midgut volvus: si/sx
bilious emesis
Usually affects age
Most common protozoal diarrhea in US
Giardia
Salmonella: Rx
TMP-SMX or quinolone
Shigella: Rx
TMP-SMX or quinolone
Most common bacterial diarrhea
Camplobacter
Camplobacter diarrea: Rx
Quinolone or erythromycin
Vibrio cholera: Rx
Doxycycline, TMP-SMX, or Cipro
Indications for thoracotomy after chest tube placement
> 1500 ml blood out initially
>200 ml/h blood out for 4 hours
Traumatic pericardial tamponade: Rx
Thoracotomy
Pericardiocentesis not effect
Aortic dissection: Width on PA CXR
8 cm
At what level on chest can you have penetrating trauma cause intrathoracic and/or intraabdominal contents?
Nipple line
Blunt diaphragmatic injury usually affects the (LEFT / RIGHT) side. Why?
Left side, because liver protects on right
Duodenal hematoma: Usual mechanism and si/sx
Handle bar hit kids in abdomen while riding bike
Causes abdominal pain and vomiting
Will see on CT
Pelvic fractures: Types
- AP compression - highest rate of GU injuries
- Lateral compression - most common
- Vertical sheer - fall from height; highest rate of hemorrhage
Which type of pelvic fracture is most common?
Lateral compression
Which type of pelvic fracture has the highest rate of GU injuries?
AP compression
Which type of pelvic fracture has the highest rate of hemorrhage?
Vertical sheer
Retroperitoneal hemorrhage in trauma: When to suspect
Patient with normal CXR and FAST who remains hypotensive despite fluid resuscitation
NOT seen on FAST
Hematuria in children after trauma: When to work up?
> 50 RBC/hpf
DPL: Definition of (+)
> 10 mL blood on initial aspirate
>100,000 RBC/mL after instilling 1L fluid
FAST: What are 4 components
- RUQ view (Morrison’s pouch/hepatorenal recess)
- LUQ view (area around spleen and diaphragm)
- Subcostal view (fluid around heart)
- Pelvic view (pelvic free fluid)
Where does traumatic TM perforation usually occur?
Pars tensa
Traumatic TM perforation: Disposition
If in posterior superior quadrant or from penetrating trauma, needs ENT f/u within 24h
Raynaud’s disease: Color progression
Red -> Blue -> White
Reiter’s syndrome: New name
Reactive arthritis
SLE triad
Fever
Rash
Joint pain
Drug-induced lupus: What marker do you see
Anti-histone Ab
Drug-induced lupus: Common drugs causing
HIPPS Hydralazine INH Phenytoin Procainamide Sulfonamides
Bechet’s disease: Pathophysiology
Medium and large vessel vasculitis
Bechet’s disease: Si/sx
Chronic recurrent oral and genital ulcers
May also have uveitis and optic neuritis (if does = admission)
Bechet’s disease: Rx
High dose steroids
Thromboangitis obliterans: Pathophysiology
Medium and small vessel vasculitis
Thromboangitis obliterans: Typical patient affected
Young male smoker
Thromboangitis obliterans: Si/sx
Superficial thrombophlebitis and necrosis of distal digits
Thromboangitis obliterans: Rx
Smoking cessation