Head and neck |
Recurrent otitis media |
Cholesteatoma |
Tympanic membrane perforation |
Eustachian tube dysfunction due to allergy or viral infection |
Sinusitis |
Ostiomeatal obstruction |
Nasal polyps |
Mucocele |
Allergic rhinitis |
Viral infection |
Inadequate therapy for acute sinusitis |
Cervical lymphadenitis |
Unrecognized branchial cleft cyst |
Inadequately treated dental disease |
Lungs |
Bronchopneumonia |
Smoking |
Acute exacerbations of chronic bronchitis |
Intrinsic airway disorders: |
Bronchiectasis, foreign body, bronchial stenosis, bronchomalacia, tracheobronchial fistula |
Recurrent aspiration (alcohol/drug use, seizure disorder) |
Esophageal disease (gastroesophageal reflux, Zenker's diverticulum, achalasia) |
Bronchial obstruction (extrinsic versus intrinsic obstruction) |
Unrecognized cystic fibrosis |
Unrecognized ciliary dyskinesia |
Genitourinary tract |
Cystitis |
Urinary stasis |
Incomplete bladder emptying (bladder outlet obstruction, bladder atony/denervation) |
Compromised perineal hygiene (overactive bladder/urinary incontinence) |
Diaphragm use |
Prostatic infection |
Instrumentation (especially chronic urinary catheter) |
Pyelonephritis |
All of the conditions that predispose to cystitis plus: |
Renal calculi |
Ureteral obstruction (stone, stricture, malignancy) |
Ureteral reflux |
Skin |
Cellulitis |
Recurrent trauma (eg, shaving legs, sports-related abrasions) |
Dermatophyte infection |
Lymphedema |
Postoperative lymphatic dysfunction (groin/axillary exploration, lymphadenectomy) |
Venous insufficiency/vein harvesting for coronary artery bypass grafting (CABG) |
Chronic edema (congestive heart failure, hepatic insufficiency, nephrotic syndrome) |
Prior cellulitis (lymphatic scarring) |
Obesity |
Filariasis |
Poor hygiene |
Abscess |
Staphylococcus aureus carriage (methicillin-sensitive or methicillin-resistant), especially with recurrent trauma |
Autoinoculation (subcutaneous drug injection or "skin popping," factitious) |
Crohn disease |
Hidradenitis suppurative (axillary, groin, periareolar) |
Retained foreign body |
Central nervous system |
Meningitis |
Cranial vault defects (cribriform plate; sinus/mastoid defects; prior neurosurgery/trauma) |
Chronic mastoid/sinus infection |
Noninfectious meningitidis: |
Drug-related |
Intravenous immune globulin (IVIG)-related |
Mollaret's meningitis related to craniopharyngioma |
Neoplastic |
Autoimmune (Behçet's, Vogt-Koyanagi-Harada) |
Brain abscess |
Right-to-left circulatory shunting |
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