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Causes of Knee Effusions - Differential Diagnosis Framework

Knee Effusion Red Flags:
1. Fever/Chills/Joint pain/Night sweats/Weight loss
	- DDX:
		-
Arthritis: - Staphylococcal ... fracture - Patellar dislocation ... diagnosis #msk #physicalexam
IDSA - Antimicrobial Therapy for Staphylococcal and Streptococcal Skin and Soft Tissue Infections
 • Impetigo (Staphylococcus
Antimicrobial Therapy for Staphylococcal ... • Impetigo (Staphylococcus ... Infections #SSTIs #Staphylococcal
Oxygen Hemoglobin Dissociation curve

Curva de disociacion de oxi-hemoglobina
 #Cardiology#CEM
Oxygen Hemoglobin Dissociation ... curve Curva de disociacion
Argyll Robertson Pupil
Definition:
 - Irregular and small (1-2mm) pupil
 - Light-near dissociation (accommodation remains intact)
 -
- Light-near dissociation ... and classical association ... ophthalmology #physicalexam
Common Childhood Exanthems - Differential Diagnosis
1) Rubeola (Measles) - Measles morbillivirus (MeV)
2) Scarlet Fever - Streptococcus
Rubella Virus 4) Staphylococcal ... Skin Syndrome - Staphylococcus
Scapholunate Dissociation
The spacing between all carpal bones should be 1-2 mm, look for the "Terry Thomas"
Scapholunate Dissociation ... diagnosis scapholunate dissociation ... perilunate or lunate dislocation ... associated fracture or dislocation ... #Scapholunate #Dissociation
Transplant Infections Timeline
Pre-transplant:
 • Common bacteria (endogenous): Staphylococci (skin), Gram-negative bacilli (gut)
 • Viruses: HSV (reactivation)
Engraftment:
(endogenous): Staphylococci ... Streptococci (oral), Staphylococci ... Streptococcus pneumonia, Staphylococcus
Endocarditis Algorithm - Infective vs Noninfective Causes
Noninfective:
 • Malignancy
 • Autoimmune disease
 • Systemic infection
Native Valve
Valve - Acute: • Staphylococcus ... streptococci • Staphylococcus ... gallolyticus • Staphylococcus ... aureus • Staphylococcus ... aureus • Staphylococcus
Nikolsky's Sign in Toxic Epidermal Necrolysis (TEN)

Nikolsky's sign is a clinical dermatological sign which is present
necrolysis and Staphylococcal ... exfoliative toxin of Staphylococcus ... #Dermatology #PhysicalExam
Adie's Pupil
What? Unknown nature & benign
 • Regular and mildly dilated pupil (4-6mm);
 • Light-near dissociaton;
• Light-near dissociaton ... no light-near dissociation ... #Adies #Pupil #PhysicalExam