--- title: "Warthin Tumor" description: "ENT notes on Warthin Tumor - Histogenesis, Histology, Symptoms, Investigations, Treatment and Recurrence." source: "The ENT Resident" author: "Dr. Mausumi Das" canonical_url: "https://www.theentresident.com/ent-notes-lectures/warthin-tumor-histology-treatment" categories: ["Oral Cavity and Salivary Glands"] video: "https://www.youtube.com/watch?v=U4P9YDKFF9E" image: "https://media.theentresident.com/og-images/warthin-tumor-histology-treatment.png" --- # Warthin Tumor ENT notes on Warthin Tumor - Histogenesis, Histology, Symptoms, Investigations, Treatment and Recurrence. Watch the full video lecture on YouTube: https://www.youtube.com/watch?v=U4P9YDKFF9E ## 🧬 Warthin’s Tumor (Papillary Cystadenoma Lymphomatosum) ### 📌 Definition of Warthin’s Tumor **Warthin’s tumor** is a **benign salivary gland tumor** composed of **two characteristic components**: 1. **Oncocytic epithelial cells** lining **papillary and cystic ductal structures** 2. **Lymphoid stroma**, often with **germinal centers** ➡️ The presence of **both oncocytic epithelium and lymphoid tissue** is diagnostic. > What are the other two names for Warthin's Tumor? Why is it called so? > What are Oncocytes? What does it's typical appearance look like? --- ### 🧠 Epidemiology of Warthin’s Tumor - **Arises exclusively from the parotid gland** - Accounts for **5–10% of parotid tumors** - Common age group: **6th–7th decade** - 🚩 **Only salivary gland tumor with male preponderance** - Usually **unifocal** > What % of Warthin tumors are multifocal & bilateral? > Which is the most common benign salivary gland tumor? > Which is the second most common benign salivary gland tumor? --- ### 📍 Site of Origin of Warthin’s Tumor - **Parotid gland only** ➡️ This exclusive parotid involvement is an important MCQ. > Which is the most common site of origin of Warthin tumor in th eparotid gland? --- ### 🚬 Risk Factors of Warthin’s Tumor **1️⃣ Cigarette Smoking** - **Strongest association** - **~8 times higher risk** in smokers compared to non-smokers - 🚩 **Only salivary gland tumor strongly linked to smoking** **2️⃣ Viral Association** > Which virus is associated with warthin's tumor? **3️⃣ Radiation Exposure** - Seen in **atomic bomb survivors** - Prior radiation exposure is a risk factor --- ### 🧠 Histogenesis (Pathogenesis) of Warthin’s Tumor **1️⃣ Heterotopia Theory** (Most Accepted) - During embryogenesis, **salivary epithelial inclusions** get trapped within **Intra-parotid or peri-parotid lymph nodes** - These epithelial inclusions later proliferate → **oncocytic epithelium** - The surrounding lymph node tissue forms the **lymphoid stroma** > How does the Heterotopia theory explain key features of Warthin Tumor? **2️⃣ Immunological Theory** (Alternative) - Lymphoid stroma represents a **reactive immune response** - Against oncocytic epithelial proliferation --- ### 🔍 Gross (Macroscopic) Pathology of Warthin’s Tumor - Well-circumscribed - Encapsulated - Smooth, soft mass **Cut Section** shows :- - **multiple cystic spaces** - Filled with **brown, viscous fluid** - Often described as having **“machine oil” or “motor oil” appearance** --- ### 🔬 Microscopic (Histological) Features of Warthin’s Tumor **1️⃣ Cystic Spaces** - Multiple cystic cavities - Filled with: - Proteinaceous material - Cellular debris **2️⃣ Epithelial Lining** - **Papillary projections** into cystic spaces - Lined by **bilayered oncocytic epithelium**: > Describe the morphology of the bilayered oncocytic epithelium. **3️⃣ Lymphoid Stroma** - Dense lymphoid tissue - Often shows **germinal centers** --- ### 🩺 Clinical Features of Warthin’s Tumor - **Slow-growing** - **Painless** - Well-defined mass - Usually **cystic and fluctuant** - Size rarely exceeds **3–4 cm** > What are some rare symptoms seen in Warthin Tumor? > What is the rate of malignant transformation in Warthin Tumor? --- ### 🔎 Investigations of Warthin’s Tumor **1️⃣ Ultrasound (First-line)** - Differentiates: - Solid vs cystic - Intraglandular vs extraglandular lesions - Useful for **FNAC guidance** **2️⃣ FNAC** - Most commonly used diagnostic test - Helps differentiate **benign vs malignant** lesions **3️⃣ Scintigraphy** (Characteristic Investigation) > What does the Technetium-99m pertechnetate scan show in Warthin's tumor? Explain why. --- ### 🩻 Treatment of Warthin’s Tumor - **Surgical excision** - Procedure of choice:- **Partial superficial parotidectomy** - Tumor removed along with superficial lobe - **Facial nerve identified and preserved** ### Prognosis of Warthin’s Tumor - **Excellent** - Recurrence: **rare** --- ### 📌 Exam Pearls - Second most common benign salivary gland tumor - Only parotid tumor with: - **Male predominance** - **Strong smoking association** - Only salivary tumor showing **Tc-99m hot uptake** - Bilayered oncocytic epithelium + lymphoid stroma = **Warthin’s tumor** --- ## About This Note This free ENT note on Warthin Tumor was written by Dr. Mausumi Das and is paired with a corresponding video lecture. 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