hneent

Assessment and Diagnostic Reasoning of HNEENT Disorders

A systematic approach to the assessment and diagnosis of head, neck, eyes, ears, nose, and throat (HNEENT) disorders in primary care practice.

Differentiating Otitis Media and Otitis Externa

  • Otalgia: Ear pain is a common symptom with specific causes needing differentiation.

    • Otitis Media (OM):

    • Most common in children.

    • Symptoms:

      • Acute onset ear pain.

      • Fever.

      • Decreased hearing.

    • Physical Findings:

      • Tympanic membrane appears red, bulging, with limited mobility on pneumatic otoscopy.

    • Otitis Externa (Swimmer's Ear):

    • Infection of the external auditory canal.

    • Symptoms:

      • Pain worsens with manipulation of tragus or pinna.

    • Physical Findings:

      • Canal appears red, swollen with purulent discharge.

      • Often associated with a history of water exposure.

Non-Ear Causes of Ear Pain (Referred Otalgia)

  • Important non-ear causes to consider when evaluating otalgia include:

    • Temporomandibular Joint (TMJ) Disorder.

    • Dental Abscess.

    • Sinusitis.

    • Head and Neck Malignancy.

    • Physical Exam:

    • Ear examination appears normal.

    • History and physical exam must include potential source areas.

Conductive vs Sensorineural Hearing Loss

  • Differentiation during Physical Exam:

    • Utilize both the Rinne and Weber Tests for quick screening.

    • Rinne Test:

    • Compares air conduction (AC) vs bone conduction (BC).

    • Positive Rinne (Normal/Sensorineural Loss): AC > BC

      • Sound heard longer at the ear canal than at the mastoid.

    • Negative Rinne (Conductive Loss): BC > AC

      • Indicates a blockage in the outer/middle ear.

    • Weber Test:

    • Determines lateralization by placing the vibrating tuning fork on the midline of the forehead.

    • Normal: Sound perceived equally in both ears.

    • Conductive Loss: Sound lateralizes to the affected ear.

    • Sensorineural Loss: Sound lateralizes to the unaffected ear.

Differential Diagnoses for Hearing Loss

  • Hearing loss may present as conductive, sensorineural, or mixed.

    • Cerumen Impaction:

    • Most common reversible cause of hearing loss.

    • Gradual onset; visible occlusion of the external auditory canal.

    • Otitis Media with Effusion (OME):

    • Fluid behind tympanic membrane.

    • Dull, retracted tympanic membrane; may see air-fluid levels.

    • Presbycusis:

    • Gradual bilateral high-frequency sensorineural hearing loss in adults over 65.

    • Difficulty understanding speech in noisy environments.

    • Noise-Induced Hearing Loss:

    • History of exposure to loud sounds.

    • Initial impact on high frequencies; may be temporary or permanent.

    • Sudden Sensorineural Hearing Loss:

    • EMERGENCY; rapid onset.

    • Often unilateral; may accompany tinnitus or vertigo.

Differential Diagnoses for Red Eye

  • Symptoms: Include pain level, vision changes, discharge characteristics, and pupil reactivity.

  • Conjunctivitis Types:

    • Viral Conjunctivitis:

    • Watery discharge; highly contagious; often bilateral.

    • Bacterial Conjunctivitis:

    • Purulent discharge; may start unilateral.

    • Allergic Conjunctivitis:

    • Prominent itching; clear discharge; seasonal pattern.

  • Subconjunctival Hemorrhage:

    • Bright red patch on sclera; painless; resolves spontaneously.

  • Corneal Abrasion/Keratitis:

    • Severe pain, photophobia; fluorescein staining reveals epithelial defect.

  • Emergency Situations:

    • Acute Angle-Closure Glaucoma:

    • Severe eye pain, headache, nausea; requires immediate care.

    • Uveitis:

    • Deep aching pain, blurred vision; requires examination.

Vision Loss/Change Differential Diagnoses

  • Cataracts:

    • Gradual, painless vision loss described as "cloudy" or "foggy".

  • Macular Degeneration:

    • Central vision loss while peripheral vision is preserved.

  • Retinal Detachment:

    • Sudden, painless vision loss with symptoms of flashes or floaters.

  • Diabetic Retinopathy:

    • Progressive vision changes; may be asymptomatic initially.

  • Hypertensive Retinopathy:

    • High blood pressure damages retina; can lead to serious complications.

  • Amaurosis Fugax:

    • Transient, painless vision loss; often indicates retinal ischemia.

Hypertensive vs Diabetic Retinopathy Exam Findings

  • Hypertensive Retinopathy:

    • Findings: Narrowed arterioles, cotton wool spots, retinal hemorrhages; may be asymptomatic.

  • Diabetic Retinopathy:

    • Findings: Microaneurysms, hard exudates; may require repeated examination for progression.

Chalazion vs. Hordeolum (Stye)

  • Chalazion:

    • Chronic, painless eyelid nodule from blockage; resolves gradually.

  • Hordeolum (Stye):

    • Acute, painful infection of eyelid glands; rapid onset; requires antibiotic treatment.

Nasal Congestion/Discharge Differential Diagnoses

  • Allergic Rhinitis:

    • Clear discharge, bilateral; respond to antihistamines.

  • Acute Bacterial Rhinosinusitis (ABRS):

    • Purulent discharge, facial pain; symptoms worsen after initial improvement.

  • Viral Rhinitis (Common Cold):

    • Self-limited; watery discharge converts to mucopurulent; no facial pain.

  • Nasal Polyps:

    • Bilateral nasal obstruction with decreased sense of smell; may require endoscopy.

Epistaxis (Nosebleed) – Differential Diagnoses

  • Most common cause: Trauma (digital manipulation, direct injury).

  • Allergic/Non-Allergic Rhinitis: Chronic inflammation increases risk of bleeding.

  • Hypertension: Poorly controlled hypertension can be a contributing factor.

  • Coagulopathy/Anticoagulants: Increased or recurrent bleeding requires evaluation.

  • Nasal Tumor: Persistent unilateral bleeding is a red flag; biopsy may be needed.

Differential Diagnoses for Sore Throat (Pharyngitis)

  • Viral Pharyngitis:

    • Gradual onset with low-grade fever, cough; throat mildly erythematous.

  • Epiglottitis:

    • EMERGENCY; severe sore throat, stridor; requires airway management.

  • Group A Streptococcal Pharyngitis:

    • Sudden onset high fever, absence of cough; use Centor criteria for diagnosis.

  • Infectious Mononucleosis:

    • Prolonged illness with fatigue; posterior cervical lymphadenopathy.

  • Peritonsillar Abscess:

    • Severe unilateral pain; requires immediate intervention.

Centor Score for Strep Pharyngitis

  • Estimates probability of streptococcal infection, guiding management.

    • Score Interpretation:

    • 0-1: Very Low Risk - no testing, symptomatic treatment.

    • 2: Low Risk - consider watchful waiting.

    • 3: Moderate Risk - perform rapid antigen test or culture.

    • 4: High Risk - consider antibiotics while awaiting culture.

Oral Lesions – Differential Diagnoses

  • Aphthous Ulcers: Painful ulcers on non-keratinized mucosa, self-limiting.

  • Oral Candidiasis: White plaques wipe off, indicating possible immunocompromised state.

  • Herpes Simplex Virus: Painful vesicles, recurrent at the same site.

  • Leukoplakia: Persistent white patches; warrants biopsy for evaluation.

  • Squamous Cell Carcinoma: Non-healing ulcer in high-risk individuals requires biopsy.

Facial Pain – Differential Diagnoses

  • Temporomandibular Disorder (TMD): Pain with jaw movement, associated with stress.

  • Trigeminal Neuralgia: Sharp facial pain, triggered by sensory activities.

  • Angina/Myocardial Ischemia: May present as facial pain; require evaluation.

  • Dental Disorders: Localized pain from dental abscesses or impacted teeth.

Facial Paralysis – Differential Diagnoses

  • Bell’s Palsy: Idiopathic paralysis; typically resolves.

  • Lyme Disease: May present bilaterally, requires further examination.

  • Stroke: Often spares the forehead; consider neurological examination.

Headache – Differential Diagnoses

  • Emergency Signs: New headache >50 years, worst headache of life, severe symptoms require urgent examination.

  • Tension Headache: Most common primary headache, presents as bilateral, mild pressure.

  • Migraine Headache: Throbbing unilateral pain with aura.

  • Cluster Headache: Severely unilateral, occurs in clusters, associated with autonomic signs.

Neck Masses – Differential Diagnoses

  • Reactive Lymphadenopathy: Common in children, soft, mobile, tender.

  • Thyroid Nodule/Goiter: Requires function tests and may need needle aspiration.

  • Metastatic Head/Neck Cancer: Hard, fixed lymph nodes, especially in older smokers/drinkers; evaluation necessary.

  • Lymphoma: Painless, firm nodes; requires tissue diagnosis.

Clinical Decision Rules for Neck Mass Evaluation

  • Any mass >2cm, persistent >2 weeks, or hard/fixed should be evaluated for malignancy, particularly in patients over 40.