--- title: "Bocca Sign, Boyce Sign & Bryce Sign | Confusing Signs in ENT Explained" description: "ENT notes on Bocca Sign, Boyce Sign and Bryce Sign." source: "The ENT Resident" author: "Dr. Mausumi Das" canonical_url: "https://www.theentresident.com/ent-notes-lectures/boyce-sign-bryce-sign-bocca-sign" categories: ["Signs, Syndromes, Triads, and Compilation Lists in ENT", "Larynx and Trachea"] video: "https://www.youtube.com/watch?v=IQUM31-vBUQ" image: "https://media.theentresident.com/og-images/boyce-sign-bryce-sign-bocca-sign.png" --- # Bocca Sign, Boyce Sign & Bryce Sign | Confusing Signs in ENT Explained ENT notes on Bocca Sign, Boyce Sign and Bryce Sign. Watch the full video lecture on YouTube: https://www.youtube.com/watch?v=IQUM31-vBUQ ## Bocca Sign, Boyce Sign & Bryce Sign These three signs sound very similar and are commonly confused with one another. In this post, we will discuss: * Bocca Sign * Boyce Sign * Bryce Sign --- ### Bocca Sign #### 📌 Type of Sign 👉 Clinical Sign elicited during **Palpation of the neck**. #### 🔍 What is the Sign? Bocca Sign refers to the **absence of laryngeal crepitus on palpation of the larynx**. The larynx feels **fixed or immobile**. #### 🩺 How is it Elicited? The larynx is moved **from side to side over the cervical spine**. > What is Muir's crackle? #### 🧠 Why Does it Occur? Loss of the **retropharyngeal space** → Larynx cannot glide freely over the vertebral column → **Absence of laryngeal crepitus** #### Seen In Conditions that obliterate the retropharyngeal space: 1- **Malignancy** — Post-cricoid carcinoma **(Most classical association)**, due to infiltration or fixation 2- **Infections & Abscesses** — Pre-vertebral abscess, Retropharyngeal abscess 3- **Lymphatic & Mass Lesions** — Retropharyngeal tumors, Retropharyngeal lymphadenopathy 4- **Tuberculosis of the Spine** — Pott's spine involving the cervical vertebrae #### 👨‍⚕️ Eponym Named after Bocca, who described the diagnostic significance of laryngeal crepitus in post-cricoid and retropharyngeal pathologies. --- ### Boyce Sign #### 📌 Type of Sign 👉 Clinical Sign elicited during **Palpation of the neck**. #### 🔍 What is the Sign? Boyce Sign refers to an **audible gurgling or splashing sound on palpation of the neck**, due to **fluid and air in a pharyngeal pouch**. Seen in **Zenker's Diverticulum (Pharyngeal Pouch)**. #### 🧠 Why Does it Occur? * Food and fluid collect inside a large pharyngeal pouch * On palpation of the neck, usually on the **left side**, the pouch contents get displaced * The presence of both food and fluid produces a **gurgling or splashing sound** #### 👨‍⚕️ Eponym Named after Boyce, who described the characteristic gurgling sound produced by retained fluid inside the pharyngeal pouch. > What is the best investigation for Zenker's diverticulum? > How does a patient of Zenker's diverticulum present? --- ### Bryce Sign #### 📌 Type of Sign 👉 Clinical Sign elicited during **Neck examination**. #### 🔍 What is the Sign? Bryce Sign refers to a **hissing sound produced on manual compression of an external laryngocele**, due to escape of air into the larynx. #### 🧠 Why Does it Occur? * Raised intralaryngeal pressure fills the laryngocele with air * An external laryngocele is an **air filled sac communicating with the laryngeal lumen** * On compression of the swelling, air escapes back into the airway lumen Producing a **hissing sound**. #### Seen In ✅ External laryngocele ✅ Combined laryngocele ❌ Not seen in Internal laryngocele > Why is Bryce sign not seen in Internal laryngocele? > What are the predisposing occupations for laryngocele? --- ### ⭐ High Yield Rapid Revision Table | Sign | Elicited By | Finding | Seen In | | --- | --- | --- | --- | | Bocca Sign | Moving the larynx side to side over the cervical spine | Absence of laryngeal crepitus | Post-cricoid carcinoma, retropharyngeal pathologies | | Boyce Sign | Palpation of the neck | Gurgling or splashing sound | Zenker's diverticulum (Pharyngeal pouch) | | Bryce Sign | Compression of the neck swelling | Hissing sound | External and combined laryngocele | --- ### 🧠 Viva Pearls * Bocca Sign is the absence of laryngeal crepitus on palpation of the larynx. * Bocca Sign occurs due to obliteration of the retropharyngeal space. * The most classical association of Bocca Sign is post-cricoid carcinoma. * Bocca Sign is also seen in pre-vertebral abscess, retropharyngeal abscess, retropharyngeal tumors, retropharyngeal lymphadenopathy and Pott's spine. * Boyce Sign is a gurgling or splashing sound on palpation of the neck. * Boyce Sign is seen in Zenker's diverticulum. * Bryce Sign is a hissing sound on compression of an external laryngocele. * Bryce Sign is seen in the external and combined laryngocele, but not in internal laryngocele. --- ## About This Note This free ENT note on Bocca Sign, Boyce Sign & Bryce Sign | Confusing Signs in ENT Explained 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/boyce-sign-bryce-sign-bocca-sign When citing or referencing this content, please credit The ENT Resident and link to the canonical page above. ## Related Notes by Category - Signs, Syndromes, Triads, and Compilation Lists in ENT: https://www.theentresident.com/ent-notes-lectures/category/signs-syndromes-triads-lists-in-ent.md - Larynx and Trachea: https://www.theentresident.com/ent-notes-lectures/category/larynx-and-trachea.md ## About The ENT Resident The ENT Resident is an educational website and resource library created by Dr. Mausumi Das (MS ENT) for ENT residents, ENT postgraduates preparing for exams, and MBBS students. Dr. Mausumi Das writes the notes, draws the diagrams, and records the lectures herself. 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