---
title: "Benign Intracranial Hypertension (Otitic Hydrocephalus)"
description: "ENT notes on Otitic Hydrocephalus - causes, pathology, clinical features, investigations, and treatment."
source: "The ENT Resident"
author: "Dr. Mausumi Das"
canonical_url: "https://www.theentresident.com/ent-notes-lectures/benign-intracranial-hypertension-otitic-hydrocephalus"
categories: ["Otology"]
video: "https://www.youtube.com/watch?v=Xw283kWMA7s"
image: "https://media.theentresident.com/og-images/benign-intracranial-hypertension-otitic-hydrocephalus.png"
---

# Benign Intracranial Hypertension (Otitic Hydrocephalus)

ENT notes on Otitic Hydrocephalus - causes, pathology, clinical features, investigations, and treatment. Watch the full video lecture on YouTube: https://www.youtube.com/watch?v=Xw283kWMA7s

## 🧠 Benign Intracranial Hypertension (Otitic Hydrocephalus)

Benign intracranial hypertension, also known as **otitic hydrocephalus**, is a **rare but important intracranial complication of otitis media**, particularly relevant in ENT practice and examinations.

It is most commonly seen as a complication of **acute otitis media (AOM)** and **chronic suppurative otitis media (CSOM)**, especially in **children and adolescents**.

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### 📌 Definition of Benign Intracranial Hypertension

**Benign intracranial hypertension** is a condition characterized by **Raised intracranial pressure (ICP)** and **Normal cerebrospinal fluid (CSF) composition**.

- It is a **rare intracranial complication of CSOM**

- Can lead to **optic atrophy and permanent blindness** if untreated

- Often associated with **sigmoid sinus thrombosis**

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### Pathophysiology of Benign Intracranial Hypertension

Following a **middle ear infection** (acute or chronic), the disease progresses as follows:

**Step 1:** Sigmoid Sinus Thrombosis

**Step 2:** Two Mechanisms Leading to Raised Intracranial Pressure

> What are the two mechanisms leading to **benign intracranial hypertension**?

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### Clinical Features of Benign Intracranial Hypertension

All symptoms are due to **raised intracranial pressure**.

1. **Severe headache**  
   - Most common presenting complaint  
   - Often associated with nausea and vomiting

2. **Diplopia on lateral gaze**  

> What is the cause behind Diplopia on lateral gaze in Benign Intracranial Hypertension?

3. **Blurring of vision**  
   - Caused by **papilledema**
   - May progress to **optic atrophy**

   **Papilledema features:**
   - Usually 5–6 diopters
   - May show exudates and hemorrhages

4. **Nystagmus**

> ⚠️ Fundoscopic examination is mandatory to assess papilledema.

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### Investigations of Benign Intracranial Hypertension

**1️⃣ Lumbar Puncture** (With Caution)

- Must be done carefully to avoid **cerebellar tonsillar herniation**

> What is the CSF Pressure seen in Benign Intracranial Hypertension?

>🚩**Normal CSF pressure** ➡️ 70–120 mm H₂O

> What are the Cerebrospinal Fluid (CSF) findings seen in Otitic Hydrocephalus?

**2️⃣ MRI Brain with Venous Study**

- Helps evaluate:

  - Venous sinuses
  - Presence and extent of sinus thrombosis

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### Treatment of Benign Intracranial Hypertension

Management is divided into **medical** and **surgical** components.

**A. Medical Management**

**1️⃣ Reduce Intracranial Pressure**

Drugs used:
- Corticosteroids
- Mannitol
- Acetazolamide
- Diuretics

**2️⃣ Treat the Primary Cause**

- **Intravenous antibiotics** to treat middle ear infection

**B. Surgical Management**

> What are the indications for surgery in Otitic Hydrocephalus?

**Surgical Options**

1. **CSF Diversion**
   - Repeated lumbar punctures
   - Lumbar drain placement
   - **Lumboperitoneal shunt** (CSF drained into peritoneal cavity)

2. **Mastoidectomy**
   - Treats the middle ear disease
   - Helps address associated sinus thrombosis

3. **Optic Nerve Sheath Decompression**
   - Prevents optic atrophy
   - Preserves vision in severe cases

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### 📌 Exam Pearls

- Benign intracranial hypertension = **raised ICP + normal CSF**
- Also known as **otitic hydrocephalus**
- Commonly associated with **sigmoid sinus thrombosis**
- **Severe headache** is the most common symptom
- CSF pressure **>300 mm H₂O**
- Early treatment prevents **blindness**

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## About This Note

This free ENT note on Benign Intracranial Hypertension (Otitic Hydrocephalus) was written by Dr. Mausumi Das and is paired with a corresponding video lecture.

Canonical page of this note: https://www.theentresident.com/ent-notes-lectures/benign-intracranial-hypertension-otitic-hydrocephalus

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