Orbital Cellulitis

Chandler Classification (Orbital Complications of Sinusitis)

• Scott-Brown's Otorhinolaryngology Vol 2, p. 311

Aetiology and Pathogenesis

• Preseptal (periorbital) cellulitis spreading posteriorly
• Dacryocystitis, dacryoadenitis, infected hordeolum
• Facial cellulitis via valveless midface venous anastomoses
• Orbital/periorbital trauma (including retained foreign body - can present months later)
• Dental abscess (aggressive mixed aerobes/anaerobes)
• Post-operative (ocular, paranasal sinus, or orbital surgery)
• Haematogenous spread from distant bacteraemia

Causative Organisms

Clinical Features

Symptoms

• Rapid onset periorbital pain, worse on eye movement
• Eyelid swelling, malaise, and fever (often marked)
• Visual impairment and diplopia
• Nasal congestion/discharge; recent history of URTI or sinusitis
• Sinus headache, tooth pain (if dental source)

Signs

• Proptosis (often non-axial/dystopia if abscess is present; may be obscured by lid oedema)
• Painful ophthalmoplegia - restricted and painful extraocular movements
• Chemosis (conjunctival oedema) with injection, sometimes subconjunctival haemorrhage
• Tender, firm, erythematous, warm eyelids

• Reduced visual acuity and colour vision
• Relative afferent pupillary defect (RAPD) - almost certain sign of optic nerve compression
• Choroidal folds and optic disc swelling on fundoscopy

• Bilateral eyelid oedema/bilateral proptosis
• Complete ophthalmoplegia, cranial nerve palsies (III, IV, VI, V1)
• Papilloedema, meningeal signs, spiking fevers

Clinical Photo

Preseptal vs. Orbital Cellulitis - Key Differentiators

Investigations

1. CT orbit + paranasal sinuses + brain (with contrast) - the most important investigation:
   • Confirms diagnosis, delineates postseptal involvement
   • Identifies subperiosteal or orbital abscess
   • Evaluates intracranial extension
   • Guides surgical planning
   • MRI is complementary (better soft tissue resolution, detects early cavernous sinus thrombosis)
2. MR venogram - gold standard for cavernous sinus thrombosis (shows absence of venous flow)
3. Laboratory: FBC with differential, CRP, blood cultures, nasal/conjunctival swabs
4. Lumbar puncture: If headache, lethargy, neurological symptoms, or toxic appearance (to exclude meningitis) - after neuroimaging
5. Tetanus immunisation status in trauma cases

Management

1. Admission and Multidisciplinary Team

• Ophthalmology - optic nerve monitoring, surgical decompression
• Otolaryngology/ENT - sinus assessment and drainage
• Paediatrics (children), Neurosurgery (intracranial complications)
• Infectious disease (atypical, severe, or unresponsive cases)
• Oral and maxillofacial surgery (dental source - infections from this source are aggressive and may spread to cavernous sinus)

2. Optic Nerve Monitoring

• Visual acuity, colour vision, light brightness appreciation, pupillary reactions
• Any deterioration prompts consideration of surgical intervention

3. Antibiotic Therapy

• IV antibiotics continued until apyrexial for 4 days
• Then oral antibiotics for 1-3 weeks (Tintinalli recommends a total 3-week course)

4. Surgical Indications

• Subperiosteal or orbital abscess confirmed on CT - drain at an early stage
• Failure to respond to IV antibiotics (typically 48-72 hours)
• Deterioration of vision or worsening optic nerve function
• Severe sinus disease requiring decompression
• RAPD present - indicates optic nerve compression → emergency lateral canthotomy/cantholysis for orbital decompression

• Endoscopic sinus surgery - drainage of infected sinuses (ethmoidectomy most commonly)
• Orbital abscess drainage - external (Lynch incision) or endoscopic
• Emergency canthotomy/cantholysis - for acute orbital compartment syndrome / severe optic nerve compression

Complications

Ocular

• Optic neuropathy - permanent visual loss (most feared)
• Exposure keratopathy
• Raised intraocular pressure
• Central retinal artery or vein occlusion
• Endophthalmitis, panophthalmitis

Intracranial (3-4% but extremely serious)

• Meningitis
• Brain abscess
• Cavernous sinus thrombosis - septic; associated with bilateral signs, CN palsies, spiking fever, papilloedema
• Epidural/subdural empyema

Subperiosteal Abscess

Differential Diagnosis of Acute Orbital Inflammation

Special Considerations

• Zygomycosis (mucormycosis): In diabetic or otherwise immunocompromised patients - presents with severe pain, external ophthalmoplegia, rapid profound visual loss, eschar in nasal passages. Associated with metabolic acidosis. Rapidly progressive and life-threatening; requires emergent surgical debridement + antifungal therapy.
• MRSA: CA-MRSA is increasing, especially in urban areas. Cover empirically with vancomycin in severe cases, skin-source cases, failed conventional therapy, or high-incidence areas.
• Retained foreign body: Cellulitis can develop months after apparently minor orbital trauma - always consider if no obvious precipitant.

🧠 Cavernous Sinus Thrombosis (CST)

ENT - MBBS | Explained from Basics

STEP 1: Understand the Anatomy First

What runs THROUGH the cavernous sinus?

LATERAL WALL (top to bottom):
  ├── CN III  (Oculomotor nerve)
  ├── CN IV   (Trochlear nerve)
  ├── CN V1   (Ophthalmic branch of Trigeminal)
  └── CN V2   (Maxillary branch of Trigeminal)

INSIDE THE SINUS ITSELF:
  ├── CN VI   (Abducens nerve) ← runs loose inside, most vulnerable!
  └── Internal Carotid Artery (with its sympathetic plexus)

When the cavernous sinus gets infected and swells, ALL these structures get compressed - and that explains every single clinical feature!

STEP 2: Why Does It Get Infected? (Pathogenesis)

The Valveless Venous System 🔑

The Danger Triangle of the Face

Route of Infection - Know These Paths:

SOURCE                          ROUTE TO CAVERNOUS SINUS
──────────────────────────────────────────────────────────
Furuncle of face/nose       → Facial vein → Ophthalmic veins → Cavernous sinus
Sinusitis (ethmoidal,       → Direct spread / emissary veins → Cavernous sinus
  sphenoidal - most common ENT cause)
Dental infection            → Pterygoid plexus → Cavernous sinus
Orbital cellulitis          → Ophthalmic veins → Cavernous sinus
Tonsil/pharyngeal abscess   → Haematogenous spread
Otitis media/mastoiditis    → Lateral sinus → Cavernous sinus (via petrosal sinus)

ENT exam point: Sphenoidal sinusitis is the single most direct and dangerous source because the sphenoid sinus is immediately adjacent to the cavernous sinus.

STEP 3: Causative Organisms

STEP 4: Clinical Features - Understand, Don't Memorise

1. Inflammation and thrombosis (clot formation) inside the sinus
2. Compression of the structures running through and around it

A. General/Systemic Signs

• High spiking fever (septic, "picket fence" pattern)
• Severe headache (retro-orbital, behind the eye)
• Malaise, lethargy, nausea, vomiting
• Neck stiffness (meningeal irritation if meningitis develops)
• Altered consciousness in severe cases

B. Orbital Signs (Comes from venous congestion + CN compression)

C. Cranial Nerve Signs (The Hallmark!)

MBBS key point: CN VI palsy (lateral rectus) is the FIRST and MOST COMMON nerve sign because it runs freely inside the sinus and is compressed earliest by even mild swelling.

D. THE MOST IMPORTANT CLINICAL SIGN - BILATERAL INVOLVEMENT

⚠️ BILATERAL proptosis + ophthalmoplegia

STEP 5: How to Remember All the Features - One Story

"A patient with a boil on their nose develops a terrible headache and spiking fever. Both eyes become red, swollen, and proptosed. They can't move their eyes (especially outward - CN VI goes first). Their eyelids droop (CN III). The area around the eye is numb (CN V1). They go drowsy - and now you know infection has reached the cavernous sinus."

STEP 6: Investigations

1. MRI Brain with Contrast + MR Venography (Gold Standard)

• Shows filling defect (absence of flow signal) in the cavernous sinus
• Dural enhancement around the cavernous sinus
• Shows associated sinusitis, orbital changes
• MR venography directly shows absence of venous flow in the thrombosed sinus

2. CT Brain with Contrast (Alternative - faster, widely available)

• Shows filling defects in cavernous sinus
• Identifies source (sinusitis, abscess)
• Less sensitive than MRI for early thrombosis

3. Other Investigations

• Full blood count (leukocytosis, elevated CRP/ESR)
• Blood cultures (identify organism)
• Lumbar puncture - to exclude meningitis (do after imaging to rule out raised ICP)
• Nasal swabs, culture of any discharge
• Blood glucose (check for diabetes)

STEP 7: Management

1. ICU / Critical Care Admission

2. IV Antibiotics (First and Most Important!)

• Must be broad-spectrum, covering Gram-positive, Gram-negative, and anaerobes
• Given for at least 2 weeks beyond clinical resolution - because bacteria hidden inside the thrombus are not killed until the sinus begins to recanalize
• Duration typically 4-6 weeks or until radiological resolution
• Be alert for relapse up to 6 weeks after stopping antibiotics

3. Anticoagulation (Controversial - know both sides!)

4. Surgical Treatment

• Surgery is not the primary treatment for CST itself
• Surgery is indicated to:
  • Drain any underlying sinusitis (especially sphenoidal, ethmoidal)
  • Drain any orbital or intracranial abscess
  • Endoscopic sinus surgery is preferred
• Follow-up for at least 6 months after recovery

5. Supportive Treatment

• IV fluids and resuscitation
• Treat exposure keratopathy (lubricating eye drops/ointment - eyes may not close due to proptosis)
• Treat secondary glaucoma
• Steroids: controversial; occasionally used with antibiotics

STEP 8: Complications

• Meningitis - infection breaks through to subarachnoid space
• Brain abscess
• Cerebral infarction - internal carotid artery compromise
• Pituitary abscess / hypopituitarism
• Blindness - optic nerve ischaemia or central retinal vein occlusion
• Death - mortality 30-40% even with treatment

STEP 9: Differential Diagnosis (Examiners Love This!)

QUICK REVISION CARD

CAVERNOUS SINUS THROMBOSIS - MBBS ESSENTIALS

ANATOMY:   CN III, IV, V1, V2 (lateral wall) + CN VI + ICA (inside)
CAUSE:     Valveless veins → retrograde spread
           ENT source: Sphenoidal/ethmoidal sinusitis (most common)
           Skin source: Facial furuncle (danger triangle of face)
ORGANISM:  S. aureus (most common)

FEATURES:  Spiking fever + severe headache
           Bilateral proptosis + chemosis ← KEY SIGN
           CN VI palsy (FIRST) → all EOM palsies
           CN V1 → periorbital numbness
           Meningism, altered consciousness

INVESTIGATION:
           MRI + MR Venogram = Gold Standard
           (absent flow in cavernous sinus)
           CT contrast = alternative
           LP after imaging (exclude meningitis)

TREATMENT:
           ICU + IV Antibiotics (4-6 weeks)
           ± Heparin anticoagulation (controversial)
           Surgery for underlying sinus/abscess
           
MORTALITY: 30-40% even with treatment
           Up to 100% if untreated

🫏 Cavernous Sinus Thrombosis — Explained Like You're a Donkey

First, What Even IS the Cavernous Sinus?

🏊 Pool (cavernous sinus)
     ↓
Wires running through it:
  • Wire 1 = moves your upper eyelid + most eye muscles (CN III)
  • Wire 2 = moves eye downward (CN IV)
  • Wire 3 = moves eye OUTWARD - the lateral rectus (CN VI) ← inside the pool!
  • Wire 4 = feeling around your eye (CN V1)
  • Wire 5 = feeling in your cheek (CN V2)
  • Pipe   = the internal carotid artery (blood supply to brain)

Now — Why Does It Get Infected?

"The veins draining into this pool have NO valves."

Where Does the Infection Come From?

ENT exam: Sphenoidal sinusitis is the most direct ENT cause because the sphenoid sinus literally SITS next to the cavernous sinus. Neighbours who share a wall.

What Happens Inside the Pool When Infected?

• Full of pus and clot 🤢
• Swollen and putting pressure on all those wires passing through it
• Blocked, so blood backs up into the eye and face

Clinical Features — Just Think "What Gets Squashed?"

🔥 First — The Infection Symptoms (Boring but Important)

• Very high spiking fever (spikes up and down like a mountain range)
• Terrible headache behind the eye
• Nausea, vomiting, lethargy
• Patient looks VERY sick (toxic)

👁️ Then — The Eye Symptoms (Blood backing up)

• Both eyes bulge out (proptosis) — blood can't drain, so it pools in the orbit and pushes the eye forward like squeezing a tube of toothpaste 🪥
• Red, swollen, puffy conjunctiva (chemosis) — same reason
• Eyelids swollen and red

🔌 Then — The Wire Symptoms (Nerves getting squashed)

The ONE Sign That Tells You It's CST and NOT Just an Eye Infection

👀👀 BOTH eyes are involved

How Do You Diagnose It?

🥇 Gold Standard: MRI + MR Venography

• MR Venography shows no blood flowing in the cavernous sinus (because it's all clotted up)
• Like checking if water flows through a pipe — if it's blocked, nothing comes out

🥈 CT Brain with Contrast

• Faster, more available
• Shows a filling defect (dark hole where the pool should be bright with contrast dye)
• Also shows the sinus infection that caused it

🩸 Blood tests

• High white cells, high CRP — confirms infection
• Blood cultures — grow the bug

💉 Lumbar Puncture

• Do it AFTER imaging (to make sure there's no brain swelling that could cause herniation)
• Rules out meningitis

Treatment — 4 Things

1. 🏥 Admit to ICU Immediately

2. 💉 IV Antibiotics — The Most Important Treatment

• Broad spectrum — kills Gram+, Gram-, anaerobes
• Ampicillin-sulbactam or Piperacillin-tazobactam to start
• Add Metronidazole for anaerobes
• Add Vancomycin if MRSA is suspected
• Give for 4-6 weeks (long time! Because bacteria hide inside the clot and can't be killed until the clot starts dissolving)
• Watch for relapse up to 6 weeks after stopping

3. 🩸 Anticoagulation (Heparin) — Controversial, Exam Favourite

4. 🔪 Surgery — Only to Drain the Source

• Surgery is NOT done ON the cavernous sinus itself
• Surgery drains the sinuses (sphenoid, ethmoid) that caused it
• Endoscopic sinus surgery (FESS) is preferred

Complications (What Happens if You Miss It)

• 🧠 Meningitis
• 🧠 Brain abscess
• 💀 Cerebral infarction (the internal carotid artery inside the pool gets involved)
• 👁️ Blindness (optic nerve, retinal vein)
• ☠️ Death (30-40% even with treatment; nearly 100% if missed)

The Whole Story in One Paragraph (Read This the Night Before Exam)

A boil on the nose / sinusitis → bacteria travel backwards through valveless veins → reach the cavernous sinus → form a septic clot → patient gets spiking fever + severe headache → clot swells the sinus → compresses CN VI first (can't look outward) then CN III (droopy lid, big pupil) then V1 (numb eye area) → blood backs up into orbit → BOTH eyes bulge out and turn red → MRI venogram shows no flow in the sinus → treat with IV antibiotics for 6 weeks ± heparin → mortality still 30-40%.

Memory Hook 🎯

• Sinus infection (source)
• Backward spread (valveless veins)
• Locks the cavernous sinus (thrombosis)
• Ophthalmoplegia - CN VI first (wire squashed)
• Chemosis + bilateral proptosis (blood backed up)
• Kills at 30-40% (mortality)

🫏 Atrophic Rhinitis — Explained Like You're a Donkey

STEP 1: Understand the Normal Nose First

1. 🌡️  WARM the air you breathe in
2. 💧  MOISTEN the air (like a humidifier)
3. 🧹  FILTER dust and germs (the mucus + tiny hairs = cilia)

• Tiny hair-like cilia that sweep mucus + dirt out
• Mucous glands that keep everything wet
• Blood vessels that help warm the air

STEP 2: Now What Goes Wrong in Atrophic Rhinitis?

Normal nose:       Atrophic rhinitis nose:
Wet sponge 🧽  →   Dry, cracked desert 🏜️
Pink mucosa   →   Pale, thin, dead mucosa
Moist + soft  →   Dry + crusty + smelly
Big turbinates →   Shrunken / absent turbinates
Narrow airway →   Paradoxically WIDE empty airway

⚡ Exam Bomb: This is called "paradoxical nasal obstruction" - the nose is actually WIDE OPEN but the patient feels blocked. Why? Because the nervous system relies on the feeling of air hitting the turbinates to sense "open nose." No turbinates = no sensation = feels blocked.

STEP 3: The Two Types — Primary vs Secondary

🔴 Primary Atrophic Rhinitis (= Ozaena)

• No obvious cause — the nose just starts dying on its own
• More common in:
  • Developing countries (subtropical + temperate climates - think India, Middle East, Africa)
  • Women more than men
  • Young adults (20s-30s)
• Associated with bacterial colonization (the bacteria don't cause it but make it way worse)

🟡 Secondary Atrophic Rhinitis

• Has a clear cause — something destroyed the turbinates
• More common in developed countries
• Less severe and less progressive than primary

STEP 4: The Bugs Involved 🦠

Important: These bugs are not necessarily the cause — they are colonisers taking advantage of dead, dry tissue. Like vultures arriving at a carcass 🦅 — they didn't kill it, but they make it worse.

STEP 5: What Actually Happens Inside — The Histology (Pathology)

1. 🔄 Squamous Metaplasia

• No cilia = mucus can't be swept out = it sits and dries into crusts

2. 🫙 Glandular Atrophy

• No glands = no mucus = dry as a desert

3. 🩸 Endarteritis Obliterans

• No blood supply = tissue dies = atrophy
• This is the KEY underlying change — kill the blood supply, kill the tissue.

Think of it this way: The garden (nasal mucosa) lost its water pipe (blood vessels), lost its gardeners (glands), and the grass (cilia + epithelium) all died. What's left? Dry, cracked, dead land.

STEP 6: Clinical Features — What Does the Patient Look Like?

Symptoms (What the Patient Tells You)

Signs (What You See on Examination)

👃 Wide, spacious, empty nasal cavities
🟫 Green/yellow/brown thick crusty deposits covering everything
🌸 Pale, thin, atrophic, fragile mucosa underneath the crusts
🪨 Shrunken or absent turbinates (especially inferior turbinate)
🩸 Bleeding when crusts are removed
🌟 In advanced cases — can see all the way to the nasopharynx 
   (normally can't do this — turbinates block the view)

Exam tip: The ENT surgeon says they can see the posterior wall of nasopharynx directly through the front of the nose. That's how big the cavity has become.

STEP 7: Investigations

1. Clinical Diagnosis Mostly

2. Nasal Swab + Culture

• Grows Klebsiella ozaenae, Proteus, Staph, E. coli
• Guides antibiotic treatment

3. CT Paranasal Sinuses

• Shows atrophy of turbinates
• Widened nasal cavity
• Associated sinusitis
• Rules out other causes (tumour, granulomatous disease)

4. Biopsy (if diagnosis unclear)

• Confirms: squamous metaplasia + glandular atrophy + endarteritis obliterans

5. Blood Tests

• Haemoglobin (anaemia can make things worse)
• ESR, ANCA (to rule out Wegener's granulomatosis if secondary suspected)

STEP 8: Treatment — The Most Exam-Heavy Part

🧴 Medical Treatment (Non-Surgical)

⚠️ Tell the examiner: Treatment of atrophic rhinitis is mostly symptomatic and supportive. There is NO cure. You manage it long-term. It is a chronic, progressive, distressing condition.

🔪 Surgical Treatment

• Air moves slower → mucosa stays moist longer
• Less turbulence → less drying
• Less surface area exposed to bacteria

🎯 Exam favourite: Young's operation = surgical closure of nostrils = treatment of primary atrophic rhinitis. The opposite of what most conditions need!

STEP 9: The PARADOX You Must Know

"The nose is WIDE but the patient feels BLOCKED"

STEP 10: Complications

• Ozaena - the unbearable foul smell — social isolation, depression
• Atrophic pharyngitis / laryngitis — the dryness spreads downward
• Sinusitis — dead mucosa can't fight infection
• Nasal septal perforation — from repeated crusting + picking + bleeding
• Secondary infection — abscess, bone involvement (rare)

THE WHOLE STORY IN ONE PARAGRAPH (Night Before Exam)

Atrophic rhinitis = the nasal turbinates slowly shrink and die → mucosa becomes dry, pale, and scarred (squamous metaplasia + glandular atrophy + endarteritis obliterans) → nose gets abnormally wide but patient feels blocked (paradoxical obstruction) → Klebsiella ozaenae colonises the dead tissue → thick green/yellow crusts form + unbearable foul smell (ozaena) that the patient CANNOT smell (anosmia) → treat with saline irrigation, glucose-glycerine drops, antibiotics → surgery = Young's operation (close the nostrils to narrow the space and let mucosa recover).

QUICK MEMORY TABLE 🎯

ATROPHIC RHINITIS - MBBS ESSENTIALS

TYPE:       Primary (ozaena) = women, developing countries, unknown cause
            Secondary = surgery / trauma / radiation / granulomas / drugs

BUGS:       Klebsiella ozaenae (most classic), Proteus, Staph, E. coli

HISTOLOGY:  3 changes (SMS):
            S = Squamous Metaplasia (no more cilia)
            M = Mucous gland atrophy (no moisture)
            S = Small vessel obliteration (endarteritis)

FEATURES:   Foul smell (OZAENA) - patient can't smell it
            Anosmia
            Paradoxical nasal obstruction (wide nose, feels blocked)
            Green/yellow crusts on rhinoscopy
            Visible nasopharynx (turbinates gone)

TREATMENT:  Saline wash + Glucose-glycerine drops
            Antibiotics (topical + systemic)
            YOUNG'S OPERATION = close the nostril shut!

🫏 Rhinitis Sicca — Explained Like You're a Donkey

FIRST: What Does "Rhinitis Sicca" Even Mean?

• Rhinitis = inflammation of the nose (rhino = nose, itis = inflammation)
• Sicca = Latin for DRY

✅ Key point for exams: Rhinitis Sicca is also called "Dry Nose Syndrome." In textbooks it also appears as "Rhinitis Sicca Anterior" when the dryness is limited to the front part of the nose. And yes - KJ Lee's textbook lists it as another name for Atrophic Rhinitis (though strictly speaking, they are different - more on that below).

STEP 1: Understand the Normal Wet Nose

• Mucous glands → secrete sticky mucus (keeps things moist + traps dust)
• Blood vessels → warm the air + keep the mucosa pink and alive
• Cilia → tiny hairs that sweep mucus + dirt out
• A protective moisture layer → like the screen protector on your phone

STEP 2: What Goes Wrong in Rhinitis Sicca?

Normal nose:            Rhinitis Sicca nose:
Moist and pink    →    Dry, pale, cracked 🏜️
Smooth surface    →    Rough with thin crusts
No crusting       →    Thin yellow/brown scabs form
No bleeding       →    Bleeds easily (epistaxis)
No discomfort     →    Itching, burning, soreness

STEP 3: How is Rhinitis Sicca DIFFERENT from Atrophic Rhinitis?

One-line memory: Rhinitis Sicca = DRY FRONT of nose, intact structure, no foul smell. Atrophic Rhinitis = DEAD whole nose, destroyed turbinates, horrible smell.

STEP 4: Why Does the Nose Dry Out? (Causes)

🌬️ Environmental / External Causes

💊 Drug-Related Causes

🩺 Systemic / Medical Causes

👆 Mechanical / Local Causes

• Nose picking (digital trauma) - most common in children!
• Nasal surgery - especially if too much turbinate was removed
• Nasal septum deviation - alters airflow, dries out certain areas
• Persistent nasal discharge - paradoxically, constant flow irritates and dries the skin of the anterior nose

STEP 5: Where Exactly in the Nose?

👃 Anterior nasal septum
   ↓
The "Little's Area" (Kiesselbach's Plexus)
= Front bottom part of nasal septum
= Where 5 arteries meet (most vascular spot in nose)
= MOST COMMON site of epistaxis
= MOST COMMON site of rhinitis sicca dryness + crusting

🎯 Exam point: Little's Area / Kiesselbach's Plexus = the site of rhinitis sicca anterior AND the most common site of epistaxis (nosebleed). They are directly connected — rhinitis sicca → crust forms → crust peels off → blood vessel tears → epistaxis.

STEP 6: Clinical Features — What Does the Patient Complain About?

"Doctor, my nose feels dry and scratchy all the time. It burns. There are little scabs inside. And I keep getting nosebleeds when I pick at them."

Symptoms:

On Anterior Rhinoscopy (Looking Inside the Nose):

🔴 Dry, pale, fragile anterior nasal mucosa
🟫 Thin yellowish-brown crusts/scabs on anterior septum
🩸 Raw, reddish, eroded areas under the crusts
   (superficial ulceration in some cases)
💧 NO watery discharge, NO polyps, NO pus

STEP 7: Diagnosis

1. History - dry environment? decongestant overuse? systemic disease? nose-picking habit?
2. Anterior rhinoscopy - see the dry mucosa and crusting at Little's Area
3. Nasal endoscopy - for deeper assessment
4. Rule out sinister causes:
   • Biopsy if crusting is unilateral, severe, or associated with bone destruction (to rule out granulomatous disease, malignancy)
   • Blood tests if systemic cause suspected (Sjögren's antibodies, TFTs, blood sugar, ESR/ANCA for Wegener's)
   • CT sinuses if structural abnormality or atrophy suspected

STEP 8: Treatment — Keep It Simple, Keep It Moist!

🥇 First Line — Moisturise, Moisturise, Moisturise

🥈 Topical Ointments / Lubricants

🥉 Treating the Underlying Cause

🔪 Surgery (Only If Medical Treatment Fails)

• Turbinate reconstruction using submucosal fat, cartilage, or platelet-rich plasma (to bulk up the cavity and reduce airflow turbulence)
• Treatment of associated septal deviation
• Avoid removing more turbinate tissue — this will make it WORSE

⚠️ Exam warning: Over-aggressive turbinate surgery CAUSES secondary atrophic rhinitis and "Empty Nose Syndrome." Less is more when it comes to turbinate surgery.

STEP 9: The Spectrum — Where Does Rhinitis Sicca Fit?

MILDEST                                                    MOST SEVERE
   │                                                            │
   ▼                                                            ▼
Rhinitis Sicca     →    Secondary Atrophic     →    Primary Atrophic
 Anterior               Rhinitis                    Rhinitis (OZAENA)
   │                        │                            │
Front of nose only      Whole nose                  Whole nose + bone
Mild dryness +          Dry + moderately            Destroyed turbinates +
crusting                atrophic                    foul smell (ozaena) +
No foul smell           May have smell              anosmia + paradoxical
Turbinates intact       Turbinates reduced          obstruction

STEP 10: One Paragraph Night-Before-Exam Summary

Rhinitis Sicca = dry nose - the nasal mucosa (especially the anterior septum / Little's Area) loses its moisture due to dry air, decongestant overuse, Sjögren's syndrome, ageing, or nose-picking → mucosa becomes dry, cracked, and covered in thin yellow crusts → patient gets itching, burning, nasal obstruction, and nosebleeds (epistaxis) → NO foul smell, NO destroyed turbinates (unlike atrophic rhinitis) → diagnose clinically with anterior rhinoscopy → treat with nasal saline irrigation + Vaseline/glycerine drops + humidification + remove the cause → surgery rarely needed.

QUICK MEMORY CARD 🎯

RHINITIS SICCA - MBBS ESSENTIALS

NAME:       Sicca = DRY. Dry nose syndrome.
            Anterior form = Rhinitis Sicca Anterior

SITE:       Anterior nasal septum (Little's Area / Kiesselbach's plexus)

CAUSES:     Dry air, AC, heaters (most common environmental)
            Decongestant spray overuse (rhinitis medicamentosa)
            Sjögren's syndrome (systemic)
            Nose picking (mechanical)
            Excessive nasal surgery
            Ageing

FEATURES:   Dryness + itching + burning
            Thin crusts (yellow/brown) on anterior septum
            Epistaxis ← most important complication
            NO foul smell (unlike atrophic rhinitis)
            NO paradoxical obstruction (unlike atrophic rhinitis)

TREATMENT:  Saline irrigation (FIRST)
            Vaseline / Glucose-glycerine drops / sesame oil
            Humidifier
            Remove the cause
            NO surgery usually needed

KEY DIFFERENCE from atrophic rhinitis:
            Sicca = MILD, FRONT only, no turbinate destruction, no foul smell
            Atrophic = SEVERE, whole nose, destroyed turbinates, ozaena