69 results
Pruritus - Generalized Differential Diagnosis Algorithm - Systemic and Primary Causes
== Primary Skin Lesions ==
Macules /
Diagnosis Algorithm ... == Primary Skin ... • Xerosis (dry skin ... == No Primary Skin ... #causes
Clonorchiasis - Clonorchis sinensis Life Cycle
1) Embryonated eggs passed in feces.
2) Eggs ingested by the snail
encyst in the skin ... Metacercariae in flesh or skin ... #diagnosis #pathophysiology ... #infectiousdiseases ... #cdc #parasite
Leishmaniasis Life Cycle
1) Sandfly takes a blood meal (injects promastigote stage into the skin)
Human Stages:
2) Promastigotes
stage into the skin ... Leishmaniasis #LifeCycle ... #diagnosis #pathophysiology ... #infectiousdiseases ... #cdc #parasite
Intestinal Hookworm Life Cycle
1) Eggs in feces
2) Rhabditiform larva hatches
3) Development to filariform larva in environment
4)
larva penetrates skin ... Hookworm #Intestinal #lifecycle ... #diagnosis #pathophysiology ... #infectiousdiseases ... #cdc #parasite
Strongyloides fuelleborni Lifecycle
Free-Living Cycle
1) Eggs containing rhabditiform larvae passed in feces.
2) Rhabditiform larvae hatch in environment.
Strongyloides fuelleborni Lifecycle ... penetrate the intact skin ... #Parasite #diagnosis ... pathophysiology #infectiousdiseases ... #cdc
Leg Pain - Differential Diagnosis Framework

Bone/Joint Causes of Leg Pain:
 • Fracture
 • Arthritis
 • Gout/pseudogout
Diagnosis Framework ... thrombophlebitis Skin ... band syndrome • Shin ... Brittle nails - Skin ... skin • Inflammation
Cold Urticaria
Prevalence - 0.05% in the population
Disease onset - Mostly 2nd to 4th decades of life
Causes
decades of life Causes ... trigger - Direct skin ... 50% of patients Skin ... 1% of patients Skin ... rheumatology #comparison #table
Rapidly Growing Mycobacterial Infections

 • Mycobacterium abscessus - Is the most pathogenic and the most likely
underlying lung disease ... Primary skin and ... Mycobacterium #diagnosis ... #differential # ... infectiousdiseases
Strongyloides Stercoralis Lifecycle
Free-Living Cycle:
1) Rhabditiform larvae in the intestine are excreted in stool. 
2) Development into
penetrate the intact skin ... intestinal mucosa (or skin ... #diagnosis #pathophysiology ... #infectiousdiseases ... #cdc #parasite
CNS Ring-Enhancing Lesions - Immunocompromised vs Immunocompetent
Multiple Ring-Enhancing Lesions:
 • Toxoplasmosis (CD4 < 100)
 • Other
Toxoplasmosis (CD4 ... Chorioretinitis • Diagnosis ... , may also see skin ... Lesions #Brain #differential ... #diagnosis #causes