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Vasculitis and Vasculitides - Differential Diagnosis Framework

When to Consider Vasculitis:
 • Purpura, ischemic skin lesions
 •
- Differential Diagnosis ... progressing GN • New pulmonary ... - GI tract: abdominal ... to exclude are infections ... Supply gut -> abdominal
IgA Vasculitis – Henoch Scholein Purpura: Pathogenesis and Clinical Findings

 - Infectious Agents - 50% have
Findings - Infectious ... respiratory tract infections ... 85%) - Colicky abdominal ... arthritis (especially knees ... Pathophysiology #Diagnosis
Vasculitis - Differential Diagnosis Framework

When to Consider Vasculitis:
• Purpura, ischemic skin lesions
• Mononeuritis multiplex
• Hematuria, proteinuria,
Diagnosis Framework ... Differential Diagnosis ... to exclude are infections ... multiplex • GI tract: Abdominal ... gut involvement, abdominal
Highlighted Conditions With Arteritis or Periarteritis of the Coronaries
Takayasu's arteritis:
 - Onset < 40 yrs
 -
nodules, livedo - Abdominal ... multiplex ANCA vasculitis ... sinusitis - pulmonary ... Oral and genital Sores ... #Differential #Diagnosis
Soil Related Infections - Differential Diagnosis Framework

Mechanism Of Infection:
 • Wound
 • GI: Ingestion, MUD, Contaminated
Soil Related Infections ... - Differential Diagnosis ... roots, is a hot spot ... sardonic" smile, abdominal ... #differential #diagnosis
Mycoses

HISTOPLASMOSIS
• Inhalation of conidia → Yeast → travel to lymph nodes → spread in body
• Bird
host): • Chronic pulmonary ... Histoplasmosis Diagnosis ... 3) Abdominal, ... Inhalation of spores ... : • Pulmonary (
Endocarditis Summary

Who?
Infectious:
• Pre-existing valvular disease
• Prosthetic valve
• Congenital heart disease
• IV substance use
• IV catheter
• Recent
Infectious: • Pre-existing ... devices (CIED) Non-Infectious ... Cerebral > Splenic, pulmonary ... nodes • Roth’s spots ... valvular disease • Vasculitis
Endocarditis - Overview and Differential Diagnosis Framework

Who?
Infectious:
• Pre-existing valvular disease
• Prosthetic valve
• Congenital heart disease
• IV
and Differential Diagnosis ... Infectious: • Pre-existing ... Cerebral > Splenic, Pulmonary ... nodes • Roth’s spots ... valvular disease • Vasculitis
Summary of Oncologic Emergencies

Neutropenic fever:
- Fever + ANC < 500 → start cefepime ± vancomycin (if
infection suspected ... CT abdomen if abdominal ... pain; full infectious ... renal failure, pulmonary ... Oncology #HemeOnc #Diagnosis
Authors: Mark M. Ramzy, DO, EMT-P (@MarkRamzyDO, EM Resident Physician, Drexel University, Department of Emergency Medicine)
Several of the diagnoses ... This post will focus ... considering the diagnosis ... Due to their short ... consider intra-abdominal