2814 results
Causes of Hypercalcemia
Hypercalcemia due to increased bone Ca2+ resorption:
 • Primary hyperparathyroidism, Malignancy, Pseudohyperparathyroidism, Renal failure,
Causes of Hypercalcemia ... coccidioidomycosis, histoplasmosis ... Hypercalcemia #Causes
Reversed Halo Sign - Infectious and Non-Infectious Differential Diagnosis
Definition: A focal rounded area of GGO surrounded
• Infectious Causes ... Paracoccidioidomycosis, Histoplasmosis ... Non-Infectious Causes
Causes of Culture Negative Abscess - Differential Diagnosis Framework
Consider prior antibiotics as a cause of a
Causes of Culture ... antibiotics as a cause ... : Aspergillus, histoplasmosis ... Mucormycosis, histoplasmosis
Causes of Hypercalcemia due to increased Vitamin D levels
 • The BIG 3:
Causes of Hypercalcemia ... Pneumocystis jiroveci, Histoplasmosis ... Hypercalcemia #VitaminD #causes
Causes of Superior Vena Cava (SVC) Syndrome 
Malignant Causes (2/3 of cases)
 - 95%
Causes of Superior ... Syndrome Malignant Causes ... Non-Malignant Causes ... - Infectious causes ... - Histoplasmosis
Monoarthritis - Differential Diagnosis
Infection (Acute):
 - S. aureus (most common)
 - S. pneumonia
 - Salmonella (in
disease Fungal: - Histoplasmosis ... Differential #Diagnosis #Causes
Causes of Erythema Nodosum
Common
 - Idiopathic (up to 55 percent)
 - Infections: streptococcal pharyngitis (28 to
Causes of Erythema ... mycoplasma, chlamydia, histoplasmosis ... Erythema #Nodosum #Causes
Skin Ulcers by Etiology - Differential Diagnosis Algorithm
Physical:
 • Trauma
 • Pressure
 • Radiation
Vascular:
 • Arterial
Fungal • Histoplasmosis ... Diagnosis #Algorithm #causes
CNS Ring-Enhancing Lesions - Immunocompromised vs Immunocompetent
Multiple Ring-Enhancing Lesions:
 • Toxoplasmosis (CD4 < 100)
 • Other
M, avium, TB, histoplasmosis ... differential #diagnosis #causes
MIAMI Mnemonic for Differential Diagnosis of Lymphadenopathy
Malignancies
 - Kaposi sarcoma, leukemias, lymphomas, metastases, skin neoplasms
Infections
 -
cryptococcosis, histoplasmosis ... sarcoidosis Iatrogenic causes