What is the correct sequence of stages in the natural history of untreated acute suppurative otitis media?

Question

Accepted Answer

B. Hyperemia → Pre-suppuration → Suppuration → Perforation → Resolution. ## Natural History and Stages of Acute Suppurative Otitis Media **Key Point:** The classic five-stage progression of untreated acute suppurative otitis media follows a predictable sequence that reflects the pathophysiological evolution from inflammation to pus formation to spontaneous drainage. ### Five Stages of ASOM (Toynbee Classification) ```mermaid flowchart TD A["Stage 1: Hyperemia
(Congestion & Edema)"]:::action --> B["Stage 2: Pre-suppuration
(Exudate accumulation)"] B --> C["Stage 3: Suppuration
(Pus formation)"] C --> D["Stage 4: Perforation
(Spontaneous rupture)"] D --> E["Stage 5: Resolution
(Healing & epithelialization)"] classDef action fill:#10b981,stroke:#059669,color:#fff ``` ### Detailed Description of Each Stage | Stage | Duration | Pathology | Clinical Features | |-------|----------|-----------|-------------------| | **1. Hyperemia** | 24 hrs | Mucosal congestion, edema of middle ear mucosa | Severe otalgia, fever, conductive hearing loss | | **2. Pre-suppuration** | 24–48 hrs | Serous exudate accumulation, increased middle ear pressure | Continued pain, bulging tympanum begins | | **3. Suppuration** | 48–72 hrs | Pus formation, maximum pressure in middle ear | Peak pain, tympanum markedly bulged, pulsating discharge | | **4. Perforation** | Variable | Spontaneous rupture of tympanic membrane | Sudden pain relief, purulent otorrhea | | **5. Resolution** | Days–weeks | Epithelialization, healing of perforation | Gradual symptom resolution, hearing recovery | **High-Yield:** The first three stages (hyperemia → pre-suppuration → suppuration) represent the pre-perforation phase and occur over approximately 48–72 hours. Modern antibiotic use often interrupts this progression before perforation occurs. **Mnemonic:** **HPSR** = **H**yperemia → **P**re-suppuration → **S**uppuration → **R**esolution (with Perforation occurring between suppuration and resolution). **Clinical Pearl:** The tympanic membrane appearance changes predictably: hyperemic (reddened) → bulging (full) → under tension (shiny, under pressure) → perforated (with drainage). This sequence is the basis for clinical staging on otoscopy. ![Acute Suppurative Otitis Media diagram](https://mmcphlazjonnzmdysowq.supabase.co/storage/v1/object/public/blog-images/explanation/3220.webp)

Answer

A. Hyperemia → Suppuration → Pre-suppuration → Perforation → Resolution

Answer

C. Pre-suppuration → Hyperemia → Suppuration → Resolution → Perforation

Answer

D. Suppuration → Hyperemia → Pre-suppuration → Perforation → Resolution

What is the correct sequence of stages in the natural history of untreated acute suppurative otitis media?

Explanation

Natural History and Stages of Acute Suppurative Otitis Media

Five Stages of ASOM (Toynbee Classification)

Detailed Description of Each Stage

Practice similar questions

Join our NEET PG community

Stage	Duration	Pathology	Clinical Features
1. Hyperemia	24 hrs	Mucosal congestion, edema of middle ear mucosa	Severe otalgia, fever, conductive hearing loss
2. Pre-suppuration	24–48 hrs	Serous exudate accumulation, increased middle ear pressure	Continued pain, bulging tympanum begins
3. Suppuration	48–72 hrs	Pus formation, maximum pressure in middle ear	Peak pain, tympanum markedly bulged, pulsating discharge
4. Perforation	Variable	Spontaneous rupture of tympanic membrane	Sudden pain relief, purulent otorrhea
5. Resolution	Days–weeks	Epithelialization, healing of perforation	Gradual symptom resolution, hearing recovery