67 results
Dermatologic Manifestations of Granulomatosis with Polyangiitis (GPA)

Skin involvement in granulomatosis with polyangiitis (GPA) is common and
Dermatologic Manifestations ... GPA causes disease ... • Goodpasture syndrome ... vasculitis #Dermatologic ... Polyangiitis #GPA #dermatology
Causes of Hypercalcemia due to increased Vitamin D levels
 • The BIG 3:
Causes of Hypercalcemia ... diseases: PR3+ ... vasculitis, Crohn's disease ... Genetic: Williams syndrome ... differential #diagnosis #endocrinology
Interstitial Lung Diseases (ILD)
Exposure-Related ILD (a.k.a. extrinsic allergic alveolitis): 
 • Hypersensitivity pneumonitis, Farmer's lung, Bird
ILD caused by inhalation ... • Vasculitis: Granulomatosis ... , Eosinophilic granulomatosis ... Churg Strauss syndrome ... differential #pulmonary #causes
Causes of Hypercalcemia
Parathyroid hormone–dependent
Primary hyperparathyroidism
Familial hypocalciuric hypercalcemia
Lithium-associated
Tertiary hyperparathyroidism
Genetic disorders (e.g., multiple endocrine neoplasia type 1 or
Causes of Hypercalcemia ... analogues - Granulomatous ... syndrome Other ... Hypercalcemia #Causes ... Differential #Diagnosis #Endocrinology
Causes of Diffuse Lung Disease. 
Collagen vascular 
 - Scleroderma 
 - Rheumatoid arthritis 
 -
Causes of Diffuse ... Lung Disease. ... Vasculitides - Wegener granulomatosis ... Churg-Strauss syndrome ... #Diffuse #Lung
Common Variable Immunodeficiency (CVID)

What?
CVID: Immunodeficiency disorder with hypogammaglobulinemia -> increased infection risk secondary to impaired B-cell
• Chronic lung ... DDX - Other causes ... : • Nephrotic syndrome ... (Epstein-Barr syndrome ... hypogammaglobulinemia #immunology #hematology
Causes of Hypercalcemia
Hypercalcemia due to increased bone Ca2+ resorption:
 • Primary hyperparathyroidism, Malignancy, Pseudohyperparathyroidism, Renal failure,
Causes of Hypercalcemia ... failure, Addison's disease ... absorption: • Granulomatous ... calcium)-alkali syndrome ... calcium #high #endocrinology
Mucous Membrane Disorder - Differential Diagnosis Algorithm
Erosions/Ulcers/Blisters
 - Primary Dermatologic Diseases
     •
Blisters - Primary Dermatologic ... Stevens-Johnson Syndrome ... • Behcet's syndrome ... MucousMembranes #dermatology ... Diagnosis #Algorithm #causes
Hypercalcemia - Differential Diagnosis Algorithm
Elevated PTH (High or normal):
 • Primary Hyperparathyroidism
 • Familial Hypocalciuric Hypercalcemia
Low
Cholecalciferol - Granulomatous ... Disease, Lymphoma ... Solid Tumors: Lung ... Diagnosis #Algorithm #causes ... #endocrinology
Purpura - Differential Diagnosis Framework

Non-blanchable, dark red to purple, hemorrhagic skin lesions that result from leakage
- Bone marrow disease ... Kasabach-Merritt syndrome ... Gardner-Diamond syndrome ... Differential #Diagnosis #hematology ... #nonpalpable #dermatology