Tell about all these in. NEet pg printed
NEET PG - Eponymous Lymph Nodes: Complete Notes
🔵 A) Virchow's Node (Troisier's Node / Sentinel Node)
| Feature | Detail |
|---|---|
| Location | Left supraclavicular fossa (Level IV neck) |
| Also called | Troisier's node; Sentinel node of Virchow |
| Named after | Rudolf Virchow - German pathologist |
| Sign | Troisier's sign = palpable left supraclavicular LN metastasis |
| Primary malignancies | Stomach (most classic), esophageal, pancreatic, colon, ovary, testis, prostate, bladder |
| Mechanism | Lymph from abdominal viscera drains via the thoracic duct -> terminates at left subclavian/jugular junction -> Virchow's node is at this junction |
| Why LEFT side? | The thoracic duct drains on the left; right duct drains right head/neck/right arm |
| NEET PG key point | Left supraclavicular LN + GI malignancy = Virchow's node |
"Virchow's node (Troisier's sign) - when a metastatic node is found in the left supraclavicular fossa, both from intra-abdominal malignancies as well as from oesophageal cancer." - Bailey & Love's Surgery 28th Edition
🟢 B) Delphian Node
| Feature | Detail |
|---|---|
| Location | Midline prelaryngeal node, anterior to the cricothyroid membrane (Level VI neck) |
| Also called | Poirier's prelaryngeal ganglia node; anterior midline metastatic node |
| Named after | Oracle of Delphi (prophetic - predicts outcome) |
| Primary malignancies | Thyroid carcinoma, laryngeal cancer (T3/T4 with subglottic extension) |
| Clinical significance | In thyroid cancer, involvement = poor prognosis indicator; in laryngeal cancer, associated with advanced disease (T3-T4) with subglottic extension |
| Surgery | Included in central compartment neck dissection (Level VI) for thyroid cancer |
| NEET PG key point | Prelaryngeal midline node = thyroid / advanced laryngeal cancer |
"The so-called 'Delphian' node (also known as the midline anterior metastatic node or Poirier's pre-laryngeal ganglia node) is very rare, but is thought to be associated with T3 or T4 tumours with significant subglottic extension." - Scott-Brown's Otorhinolaryngology
🟡 C) Cloquet's Node (Node of Rosenmüller)
| Feature | Detail |
|---|---|
| Location | Highest (most superior) deep inguinal lymph node, lying in the femoral ring, medial to the femoral vein |
| Also called | Rosenmüller's node; sentinel node of the groin |
| Lies deep to | Fascia lata; within the femoral canal |
| Function | "Transition node" - where inguinal lymphatics gain access to the pelvis / external iliac nodes |
| Primary malignancies | Penile cancer, vulval cancer, anal cancer, lower limb melanoma, scrotal cancer |
| Surgical importance | If Cloquet's node is histologically POSITIVE on frozen section → proceed to deep (ilioinguinal) dissection (pelvic nodes likely involved) |
| NEET PG key point | Most superior deep inguinal node at femoral ring; positive = pelvic node involvement likely |
"The node of Cloquet represents the transition node where the lymphatics gain access to the pelvis and is frequently used as an indicator of disease extending beyond the inguinal ligament." - Fischer's Mastery of Surgery 8th ed.
🔴 D) Preauricular Node (Parotid Node)
| Feature | Detail |
|---|---|
| Location | Anterior to the tragus of the ear, over the parotid gland |
| Also called | Parotid lymph node / anterior auricular node |
| Drains | Temporal scalp, lateral eyelids, conjunctiva, external auditory meatus, parotid gland |
| Tender preauricular node | Viral conjunctivitis (adenovirus), trachoma, cat-scratch disease (Parinaud's oculoglandular syndrome) |
| Painless preauricular node | Squamous cell carcinoma of eyelid, parotid malignancy |
| NEET PG key point | Preauricular node + unilateral conjunctivitis = adenoviral keratoconjunctivitis OR Parinaud's syndrome |
Quick Comparison Table (High-Yield NEET PG)
| Node | Location | Associated Malignancy/Condition |
|---|---|---|
| Virchow's | Left supraclavicular fossa | GI cancers (stomach, esophagus), pelvic cancers |
| Delphian | Midline prelaryngeal (Level VI) | Thyroid cancer, advanced laryngeal cancer |
| Cloquet's | Femoral ring (highest deep inguinal) | Penile/vulval/anal/scrotal cancer, lower limb melanoma |
| Preauricular | Anterior to tragus | Viral conjunctivitis, parotid malignancy, cat-scratch disease |
| Sister Mary Joseph's | Periumbilical | Gastric, ovarian, colorectal cancer |
| Delbet's | Femoral ring | Same as Cloquet's (alternate name) |
Answer to the MCQ
Create a visual comparison poster of eponymous lymph nodes
Medical education poster titled "Eponymous Lymph Nodes" for NEET PG students. Clean, professional medical infographic style with a dark navy blue background. Layout: Central human body silhouette outline in white/light blue showing full body from head to groin. Around the body, 5 labeled lymph node cards with arrows pointing to their anatomical locations on the body: 1. VIRCHOW'S NODE (top left card, red accent) - Arrow pointing to left supraclavicular fossa (base of neck, left side). Card text: "Left Supraclavicular Fossa | Also: Troisier's Node | GI Cancers (Stomach, Esophagus) | Thoracic duct drainage" 2. DELPHIAN NODE (top right card, orange accent) - Arrow pointing to anterior midline neck (prelaryngeal area). Card text: "Midline Prelaryngeal | Level VI Neck | Thyroid Cancer | Advanced Laryngeal Cancer (T3/T4)" 3. PREAURICULAR NODE (far top left, purple accent) - Arrow pointing to in front of the ear/temple. Card text: "Anterior to Tragus | Viral Conjunctivitis | Adenovirus, Trachoma | Parinaud's Syndrome" 4. SISTER MARY JOSEPH NODE (center left, teal accent) - Arrow pointing to umbilicus. Card text: "Periumbilical Nodule | Gastric / Ovarian / Colorectal | Intra-abdominal metastasis" 5. CLOQUET'S NODE (bottom right card, green accent) - Arrow pointing to the femoral ring/groin area. Card text: "Femoral Ring (Highest Deep Inguinal) | Also: Rosenmüller's Node | Penile / Vulval / Anal Cancer | +ve = Pelvic node involvement" Bottom of poster: A summary comparison table with columns: Node | Location | Malignancy. Footer: "NEET PG Surgery & Anatomy | Eponymous Lymph Nodes" All text in white or bright colors, clean sans-serif font, medical illustration aesthetic
| Node | Location | Key Association |
|---|---|---|
| Virchow's | Left supraclavicular fossa | GI cancers (stomach classic) |
| Delphian | Midline prelaryngeal (Level VI) | Thyroid / advanced laryngeal cancer |
| Preauricular | Anterior to tragus | Viral conjunctivitis, Parinaud's syndrome |
| Sister Mary Joseph's | Periumbilical | Gastric / ovarian / colorectal |
| Cloquet's | Femoral ring (highest deep inguinal) | Penile / vulval / anal cancer; +ve = pelvic spread |
- Virchow = Visceral (abdominal) cancers, Left neck
- Delphian = Delphi oracle "predicts" thyroid/laryngeal outcome
- Preauricular = Parotid area / Parinaud's
- Sister Mary Joseph = Stomach / Junction (umbilicus)
- Cloquet = Crossing point (inguinal to pelvic), Carcinoma of penis/vulva
Other important lumphonodes for neet pg
Medical education poster titled "Important Lymph Nodes for NEET PG" - comprehensive surgery and anatomy reference card. Dark navy blue background, professional clinical infographic style with colored coded sections. Divide poster into 6 color-coded sections: 1. EPONYMOUS NODES (red section, top left): - Virchow's Node: Left supraclavicular - GI cancers - Delphian Node: Prelaryngeal midline - Thyroid/Laryngeal - Cloquet's Node: Femoral ring - Penile/Vulval cancer - Sister Mary Joseph: Periumbilical - Gastric/Ovarian - Preauricular Node: Anterior to tragus - Conjunctivitis/Parotid 2. NECK LEVELS (orange section, top right): Level I: Submental/Submandibular - oral cavity Level II: Upper jugular - oral, oropharynx, nasopharynx Level III: Mid jugular - oral cavity, oropharynx Level IV: Lower jugular - hypopharynx, thyroid (Virchow's left) Level V: Posterior triangle - nasopharynx, thyroid Level VI: Central/Prelaryngeal - thyroid, larynx (Delphian) 3. AXILLARY LEVELS for BREAST (green section, middle left): Level I: Lateral to pectoralis minor (most common) Level II: Behind pectoralis minor (includes Rotter's/interpectoral) Level III: Medial to pectoralis minor (apical) Rotter's node: between pectoral muscles (interpectoral) 4. ORGAN-SPECIFIC DRAINAGE (blue section, middle right): Testis → Para-aortic nodes (L1 level) Penis/Vulva → Superficial inguinal → Deep inguinal (Cloquet's) → External iliac Rectum (upper) → Inferior mesenteric → Para-aortic Rectum (lower) → Internal iliac Anal canal above dentate → Internal iliac Anal canal below dentate → Superficial inguinal 5. FIRST ECHELON / SENTINEL NODES (purple section, bottom left): Breast → Axillary Level I (anterior pectoral group) Melanoma → Blue dye/radiotracer guided Cervix → Obturator / external iliac Stomach → Left gastric / celiac nodes 6. HIGH-YIELD FACTS (yellow/gold section, bottom right): Most common site of LN metastasis = Regional nodes Hard, painless, fixed LN = Malignant Soft, tender LN = Reactive/Infective Virchow's left, right = right thoracic duct (lung apex, esophagus) Bilateral supraclavicular = lymphoma Title at top in large white bold text. Footer: "NEET PG Surgery | Lymph Node Guide" White text throughout, clean modern medical infographic style
All Important Lymph Nodes for NEET PG - Complete Notes
1. EPONYMOUS NODES (Most Tested)
| Node | Location | Primary Association | Key Point |
|---|---|---|---|
| Virchow's | Left supraclavicular | Stomach, esophagus, testis, prostate | Troisier's sign; via thoracic duct |
| Delphian | Midline prelaryngeal (Level VI) | Thyroid, T3/T4 laryngeal cancer | "Oracle" - predicts bad outcome |
| Cloquet's | Femoral ring (highest deep inguinal) | Penile, vulval, anal, scrotal cancer | +ve = pelvic node dissection needed |
| Sister Mary Joseph | Periumbilical subcutaneous | Gastric, ovarian, colorectal | Seen in advanced intra-abdominal malignancy |
| Preauricular | Anterior to tragus | Adenoviral conjunctivitis, Parinaud's, parotid tumors | Tender = viral; Painless = malignant |
| Rotter's | Between pectoralis major & minor (interpectoral) | Breast cancer (Level II axilla) | Can be missed in axillary dissection |
2. CERVICAL LYMPH NODE LEVELS (AHNS Classification)
| Level | Location | Drains |
|---|---|---|
| I | Submental (Ia) + Submandibular (Ib) | Oral cavity, lip, anterior face |
| II | Upper jugular (above hyoid) | Oral cavity, oropharynx, nasopharynx, parotid |
| III | Mid jugular (hyoid to cricoid) | Oral cavity, oropharynx, hypopharynx |
| IV | Lower jugular (below cricoid) | Hypopharynx, thyroid, cervical esophagus; Virchow's = left Level IV |
| V | Posterior triangle | Nasopharynx, thyroid, posterior scalp |
| VI | Central compartment (prelaryngeal) | Thyroid, larynx subglottis; Delphian = Level VI |
| VII | Upper mediastinal | Thyroid, trachea |
3. AXILLARY LYMPH NODE LEVELS (Breast Cancer)
| Level | Position | Landmark |
|---|---|---|
| Level I | Lateral to pectoralis minor | Anterior (pectoral), posterior (subscapular), lateral group |
| Level II | Behind pectoralis minor | Central group + Rotter's (interpectoral) nodes |
| Level III | Medial to pectoralis minor | Apical group; drain to subclavian/infraclavicular |
- Most common axillary LN involved in breast cancer: Level I
- Skip metastasis: Level III without Level I/II involvement - seen in ~2% of cases
- Internal mammary nodes: drain medial quadrant of breast - important in staging
- Sentinel node biopsy was first described for melanoma (Morton, 1992), then applied to breast cancer (Krag, 1993)
4. ORGAN-SPECIFIC LYMPH DRAINAGE (High Yield)
Testis
- Drains directly to para-aortic nodes at L1 (follows gonadal vessels)
- NOT to inguinal nodes (unless scrotal skin invaded)
- Right testis → inter-aortocaval + right para-aortic
- Left testis → left para-aortic (below left renal vein)
- High yield: Inguinal nodes involved only if scrotal skin or epididymis invaded
Penis
- Superficial inguinal → Deep inguinal (Cloquet's) → External iliac → Common iliac
- Glans penis: can drain directly to deep inguinal nodes
Anal Canal
- Above dentate line: Internal iliac nodes (internal pudendal)
- Below dentate line: Superficial inguinal nodes
Rectum
- Upper 2/3: Inferior mesenteric → para-aortic nodes
- Lower 1/3: Middle rectal → internal iliac nodes
Stomach
- Lesser curvature → Left gastric → Celiac nodes
- Greater curvature → Right gastroepiploic → Pyloric nodes
- Fundus → Short gastric → Splenic hilar nodes
- All ultimately → para-aortic / celiac axis nodes
Carcinoma Cervix
- First echelon: Obturator nodes (most common first involved)
- Then: External iliac → Internal iliac → Common iliac → Para-aortic
Urinary Bladder
- External iliac + Internal iliac (hypogastric) nodes
5. CLINICAL FEATURES - LN CHARACTERISTICS
| Feature | Benign/Reactive | Malignant |
|---|---|---|
| Consistency | Soft / rubbery | Hard, stony |
| Tenderness | Tender | Non-tender (usually) |
| Mobility | Mobile | Fixed (matted) |
| Border | Smooth, well-defined | Irregular |
| Overlying skin | Normal | May be involved |
- Rubbery, painless, matted: Lymphoma
- Hard, fixed, non-tender: Carcinoma metastasis
- Tender, soft: Reactive (infection/inflammation)
- Caseating, soft, matted: Tuberculous lymphadenitis
6. SENTINEL LYMPH NODE BIOPSY (SLNB)
| Cancer | Sentinel Node Location | Method |
|---|---|---|
| Breast | Axillary Level I | Blue dye + Tc-99m colloid |
| Melanoma | Depends on primary site | Blue dye / radiotracer |
| Vulval cancer | Inguinal nodes | Blue dye |
| Penile cancer | Superficial inguinal | Modified inguinal dissection |
- If SLNB positive → complete regional lymph node dissection
- False negative rate of SLNB in breast: ~5-10%
7. ONE-LINERS FOR QUICK REVISION
- Virchow's node = Left neck, GI/pelvic malignancy via thoracic duct
- Delphian = thyroid cancer prognosis node, midline Level VI
- Cloquet's = femoral ring, positive = do pelvic clearance
- Sister Mary Joseph = umbilical nodule, think gastric/ovarian
- Rotter's node = interpectoral (between pec major & minor), breast cancer
- Testis drains to para-aortic (NOT inguinal unless scrotal skin involved)
- Anal canal below dentate = inguinal nodes; above = internal iliac
- Cervix first echelon = obturator nodes
- Nasopharynx → posterior triangle (Level V) nodes
- Hodgkin's starts in mediastinal/cervical nodes and spreads contiguously
All important ganglions for neet pg
Medical education poster titled "Important Ganglia for NEET PG" - comprehensive anatomy and neuroscience reference. Dark navy background, professional clinical infographic with color-coded sections. TWO MAIN CATEGORIES clearly labeled: SECTION A - "PARASYMPATHETIC GANGLIA OF HEAD" (blue-teal section, left half): Four boxes arranged vertically, each with a nerve icon: Box 1 - CILIARY GANGLION (CN III): Location: Orbit (behind globe) Preganglionic: Edinger-Westphal nucleus → CN III Innervates: Sphincter pupillae (miosis) + Ciliary muscle (accommodation) Lesion: Adie's pupil (dilated, light-near dissociation) Box 2 - PTERYGOPALATINE (SPHENOPALATINE) GANGLION (CN VII): Location: Pterygopalatine fossa Preganglionic: Superior salivatory nucleus → GSPN → CN VII Innervates: Lacrimal gland, nasal & palatal glands Lesion: Dry eye (alacrima); Blocked in cluster headache Box 3 - SUBMANDIBULAR GANGLION (CN VII): Location: Submandibular triangle, on hyoglossus Preganglionic: Superior salivatory nucleus → Chorda tympani → Lingual nerve Innervates: Submandibular + Sublingual salivary glands Box 4 - OTIC GANGLION (CN IX): Location: Infratemporal fossa, below foramen ovale Preganglionic: Inferior salivatory nucleus → Jacobson's nerve → Lesser petrosal nerve Innervates: Parotid gland (via auriculotemporal nerve) Lesion: Frey's syndrome (gustatory sweating) post-parotidectomy SECTION B - "SYMPATHETIC & SENSORY GANGLIA" (orange-red section, right half): Box 5 - SUPERIOR CERVICAL GANGLION: Largest cervical sympathetic ganglion Supplies: Head, neck, face Lesion → Horner's syndrome (ptosis, miosis, anhidrosis, enophthalmos) Box 6 - STELLATE (INFERIOR CERVICAL) GANGLION: Fusion of inferior cervical + T1 ganglion Block used for: CRPS, angina, hyperhidrosis, phantom limb pain Box 7 - TRIGEMINAL (GASSERIAN) GANGLION: Location: Meckel's cave (petrous temporal) Sensory ganglion of CN V (all 3 divisions) Lesion: Herpes zoster → severe facial pain; Trigeminal neuralgia Box 8 - GENICULATE GANGLION (CN VII): Location: Facial canal, petrous bone Sensory ganglion of facial nerve (taste anterior 2/3 tongue) Lesion: Ramsay Hunt Syndrome (VZV) → facial palsy + ear vesicles + deafness BOTTOM STRIP - "SURGICAL/CLINICAL GANGLION": Ganglion Cyst: Most common benign soft tissue tumor of hand/wrist; dorsal wrist (most common); treat by aspiration or excision Celiac Ganglion: Prevertebral; block used for pancreatic cancer pain Auerbach's/Meissner's Plexus: Absent in Hirschsprung disease Title in large white bold text at top. Footer: "NEET PG Anatomy & Neuroanatomy | Ganglia Guide" All text white/yellow, clean sans-serif, medical textbook style
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Important ganglions for Neet pg
Medical NEET PG study poster titled "IMPORTANT GANGLIA" on dark navy background. Clean, high-contrast, text-heavy infographic with color coded boxes. No complex illustrations, just organized boxes with text. Left column - "PARASYMPATHETIC HEAD GANGLIA" header in cyan: Box 1 (cyan outline): CILIARY GANGLION - Cranial nerve: CN III (Oculomotor) - Nucleus: Edinger-Westphal - Route: CN III → Ciliary ganglion → Short ciliary nerves - Supplies: Sphincter pupillae (miosis) + Ciliary muscle (accommodation) - Lesion: Adie's pupil - dilated, poor light reflex, slow accommodation Box 2 (cyan outline): PTERYGOPALATINE GANGLION - Cranial nerve: CN VII (Facial) - Route: Superior salivatory nucleus → GSPN → Vidian nerve → PPG - Supplies: Lacrimal gland, nasal glands, palatine glands - Location: Pterygopalatine fossa - Block: Used for cluster headache Box 3 (cyan outline): SUBMANDIBULAR GANGLION - Cranial nerve: CN VII (Facial) - Route: Superior salivatory nucleus → Chorda tympani → Lingual nerve → Ganglion - Supplies: Submandibular + Sublingual glands - Location: Hangs from lingual nerve on hyoglossus Box 4 (cyan outline): OTIC GANGLION - Cranial nerve: CN IX (Glossopharyngeal) - Route: Inferior salivatory nucleus → Jacobson nerve → Lesser petrosal nerve → Otic ganglion → Auriculotemporal nerve - Supplies: Parotid gland - Location: Below foramen ovale - Lesion: Frey syndrome (gustatory sweating) after parotid surgery Right column - "SENSORY & SYMPATHETIC GANGLIA" header in orange: Box 5 (orange outline): TRIGEMINAL (GASSERIAN) GANGLION - Cranial nerve: CN V (Trigeminal) - all 3 divisions - Location: Meckel's cave, petrous apex - Contains: Cell bodies of sensory neurons (V1, V2, V3) - Lesion: Herpes zoster → intense facial pain; trigeminal neuralgia - Procedure: Percutaneous rhizotomy for trigeminal neuralgia Box 6 (orange outline): GENICULATE GANGLION - Cranial nerve: CN VII (Facial) - Location: Facial canal, petrous bone (genu of facial nerve) - Carries: Taste from anterior 2/3 tongue; sensory from external ear - Lesion: Ramsay Hunt Syndrome (VZV) = facial palsy + ear vesicles + vertigo/deafness Box 7 (orange outline): SUPERIOR CERVICAL GANGLION - Largest cervical sympathetic ganglion - Supplies: Head, neck, dilator pupillae, superior tarsal muscle, sweat glands - Lesion: Horner's Syndrome = ptosis + miosis + anhidrosis + enophthalmos Box 8 (orange outline): STELLATE GANGLION - = Inferior cervical ganglion fused with T1 ganglion - Location: Neck of 1st rib / C7 transverse process - Block used for: CRPS, hyperhidrosis, phantom limb, hot flashes - Side effect of block: Horner's syndrome (expected) Bottom strip (green): SURGICAL GANGLION GANGLION CYST: Most common benign soft tissue tumor of hand | Dorsal wrist (most common site, 65%) | Arises from scapholunate ligament | Treatment: aspiration or excision CELIAC GANGLION BLOCK: For unresectable pancreatic cancer pain Footer: "NEET PG Anatomy | All Important Ganglia at a Glance"
All Important Ganglia for NEET PG
PART 1 - PARASYMPATHETIC HEAD GANGLIA (The "4 Head Ganglia")
1. CILIARY GANGLION
| Feature | Detail |
|---|---|
| CN | CN III (Oculomotor) |
| Nucleus | Edinger-Westphal nucleus (midbrain) |
| Preganglionic route | Edinger-Westphal → CN III (inferior division) → Ciliary ganglion (in orbit, lateral to optic nerve) |
| Postganglionic | Short ciliary nerves → Sphincter pupillae + Ciliary muscle |
| Function | Miosis (pupil constriction) + Accommodation |
| Lesion | Adie's pupil = ciliary ganglion damage → dilated pupil, poor light reflex, slow tonic accommodation, light-near dissociation |
| Passes through (not synapse) | Sympathetic fibers (from superior cervical ganglion) and sensory fibers (nasociliary) also pass through but do NOT synapse here |
"Preganglionic fibers from the Edinger-Westphal nucleus travel in the oculomotor nerve and synapse in the ciliary ganglion; axons innervate the ciliary muscle and pupillary sphincter." - Adams & Victor's Neurology
2. PTERYGOPALATINE (SPHENOPALATINE) GANGLION
| Feature | Detail |
|---|---|
| CN | CN VII (Facial) |
| Nucleus | Superior salivatory nucleus (pons) |
| Preganglionic route | Superior salivatory nucleus → Nervus intermedius → GSPN (Greater Superficial Petrosal Nerve) → Vidian nerve → PPG |
| Location | Pterygopalatine fossa (behind maxillary sinus) |
| Postganglionic | → Lacrimal gland, nasal glands, palatine glands |
| Sensory root | Maxillary nerve (CN V2) - passes through without synapsing |
| Clinical use | Sphenopalatine ganglion block - used for cluster headache and facial pain |
| Lesion | Loss of lacrimation (dry eye/alacrima) |
3. SUBMANDIBULAR GANGLION
| Feature | Detail |
|---|---|
| CN | CN VII (Facial) |
| Nucleus | Superior salivatory nucleus (pons) |
| Preganglionic route | Superior salivatory nucleus → Chorda tympani → joins Lingual nerve (CN V3) → Submandibular ganglion |
| Location | Hangs from lingual nerve, sits on hyoglossus muscle |
| Postganglionic | Submandibular gland + Sublingual gland |
| Sensory root | Lingual nerve (CN V3) - passes through without synapsing |
| Note | Chorda tympani also carries taste from anterior 2/3 tongue |
4. OTIC GANGLION
| Feature | Detail |
|---|---|
| CN | CN IX (Glossopharyngeal) |
| Nucleus | Inferior salivatory nucleus (medulla) |
| Preganglionic route | Inferior salivatory nucleus → CN IX → Jacobson's nerve (tympanic branch) → Lesser Superficial Petrosal Nerve (LSPN) → exits via foramen ovale → Otic ganglion |
| Location | Infratemporal fossa, just below foramen ovale, medial to mandibular nerve |
| Postganglionic | Auriculotemporal nerve (CN V3) → Parotid gland |
| Clinical | Frey's syndrome (gustatory sweating after parotid surgery) = misdirected regeneration of otic ganglion fibers into skin sweat glands |
"Can People Solve Odd" = Ciliary (III) → Pterygopalatine (VII) → Submandibular (VII) → Otic (IX)
PART 2 - SENSORY GANGLIA
5. TRIGEMINAL (GASSERIAN / SEMILUNAR) GANGLION
| Feature | Detail |
|---|---|
| CN | CN V (all 3 divisions - V1, V2, V3) |
| Location | Meckel's cave (trigeminal cave) in petrous temporal bone |
| Type | Sensory ganglion (equivalent to dorsal root ganglion) |
| Contains | Cell bodies of all trigeminal sensory neurons |
| Lesion | Herpes zoster → intense hemifacial pain + vesicular rash in trigeminal distribution |
| Procedure | Percutaneous rhizotomy / glycerol injection into Meckel's cave for trigeminal neuralgia |
| Note | V3 (mandibular) carries motor root separately - does NOT pass through Gasserian ganglion |
6. GENICULATE GANGLION
| Feature | Detail |
|---|---|
| CN | CN VII (Facial nerve) |
| Location | Genu (bend) of facial nerve in petrous bone, facial canal |
| Type | Sensory ganglion of facial nerve |
| Carries | Taste from anterior 2/3 tongue; general sensation from external ear (via nervus intermedius) |
| Lesion | Ramsay Hunt Syndrome (Herpes Zoster Oticus, VZV reactivation) |
| Ramsay Hunt triad | Facial nerve palsy + Vesicles in ear (external auditory meatus/pinna) + Sensorineural hearing loss/vertigo |
| Note | GSPN arises from geniculate ganglion to go to pterygopalatine ganglion |
7. DORSAL ROOT GANGLION (SPINAL)
| Feature | Detail |
|---|---|
| Location | Posterior (dorsal) root of each spinal nerve, within intervertebral foramen |
| Type | Sensory ganglion - pseudounipolar neurons |
| Contains | Cell bodies of somatic sensory neurons |
| Clinical | VZV remains latent here → reactivates as Herpes Zoster (shingles) in a dermatomal distribution |
| Also | Tabes dorsalis (neurosyphilis) destroys dorsal root ganglia |
PART 3 - SYMPATHETIC GANGLIA
8. SUPERIOR CERVICAL GANGLION
| Feature | Detail |
|---|---|
| Location | Behind internal carotid artery at C2-C3 level |
| Largest | Largest of the 3 cervical sympathetic ganglia |
| Supplies | Head, neck, face - via plexus on internal/external carotid artery |
| Includes | Dilator pupillae, superior tarsal muscle (Muller's), sweat glands of face |
| Lesion | Horner's Syndrome = Ptosis (superior tarsal) + Miosis (dilator pupillae) + Anhidrosis (face) + Enophthalmos |
9. STELLATE GANGLION (CERVICOTHORACIC GANGLION)
| Feature | Detail |
|---|---|
| Formation | Fusion of inferior cervical ganglion + T1 thoracic ganglion |
| Location | Anterolateral to C7 vertebra / neck of 1st rib |
| Supplies | Head, neck, upper limb sympathetics |
| Block indications | CRPS (Complex Regional Pain Syndrome), hyperhidrosis of arm, phantom limb pain, hot flashes |
| Expected side effect of block | Horner's syndrome (ptosis, miosis, anhidrosis) - due to blocking superior cervical ganglion supply |
10. PREVERTEBRAL (COLLATERAL) GANGLIA
| Ganglion | Location | Supplies |
|---|---|---|
| Celiac ganglion | Around celiac axis, T12-L1 | Stomach, liver, pancreas, small bowel to transverse colon |
| Superior mesenteric ganglion | Around SMA origin | Small bowel, ascending + transverse colon |
| Inferior mesenteric ganglion | Around IMA origin | Descending colon, sigmoid, rectum, bladder, genitals |
| Aorticorenal ganglion | Near renal artery origin | Kidneys, adrenal gland |
PART 4 - SURGICAL / ORTHOPEDIC GANGLION
11. GANGLION CYST (Wrist/Hand)
| Feature | Detail |
|---|---|
| Definition | Cystic swelling arising from joint capsule or tendon sheath, filled with mucinous fluid |
| Most common benign | Most common benign soft tissue tumor of the hand/wrist |
| Sites (in order) | Dorsal wrist (65%) > Volar wrist (20%) > Flexor tendon sheath (10-15%) > Dorsal DIPJ (mucous cyst) |
| Dorsal wrist | Arises from scapholunate ligament |
| Volar wrist | Arises from radiocarpal/STT joint - near radial artery (care during aspiration) |
| Seed ganglion | Small ganglion at A1 pulley of flexor tendon sheath, base of finger |
| Mucous cyst | Over dorsal DIP joint, associated with osteoarthritis |
| Treatment | Aspiration (high recurrence ~50%) or surgical excision (recurrence ~10-15%) |
| Transilluminates | Yes (fluid-filled) |
QUICK SUMMARY TABLE
| Ganglion | CN | Nucleus | Supplies | Key Lesion |
|---|---|---|---|---|
| Ciliary | III | Edinger-Westphal | Sphincter pupillae + ciliary | Adie's pupil |
| Pterygopalatine | VII | Superior salivatory | Lacrimal, nasal, palatine | Dry eye; cluster headache block |
| Submandibular | VII | Superior salivatory | Submandibular + sublingual glands | Dry mouth |
| Otic | IX | Inferior salivatory | Parotid gland | Frey's syndrome |
| Gasserian | V | - (sensory) | Face sensation | Herpes zoster, trigeminal neuralgia |
| Geniculate | VII | - (sensory) | Taste ant 2/3 tongue + ear | Ramsay Hunt syndrome |
| Superior cervical | Sympathetic | T1-T3 lateral horn | Head/neck sympathetics | Horner's syndrome |
| Stellate | Sympathetic | T1-T2 lateral horn | Head/neck/arm | Horner's (expected after block) |
| Ganglion cyst | N/A (surgical) | - | - | Most common hand tumor; dorsal wrist |
ONE-LINERS FOR RAPID REVISION
- 4 parasympathetic ganglia in head = Ciliary (III), Pterygopalatine (VII), Submandibular (VII), Otic (IX)
- Jacobson's nerve = tympanic branch of CN IX → carries preganglionic to otic ganglion
- Chorda tympani = carries preganglionic to submandibular ganglion + taste from anterior 2/3 tongue
- GSPN arises from geniculate ganglion → to pterygopalatine ganglion → lacrimal gland
- Geniculate ganglion = VZV → Ramsay Hunt (not Bell's palsy which is HSV-1)
- Bell's palsy = HSV-1; Ramsay Hunt = VZV (worse prognosis)
- Frey's syndrome = damaged otic ganglion fibers → misdirected to skin → sweating while eating
- Horner's = Superior cervical ganglion or sympathetic chain lesion
- Stellate block side effect = expected Horner's
- Adie's pupil = ciliary ganglion lesion → dilated + light-near dissociation
- Dorsal wrist ganglion = most common hand soft tissue tumor; from scapholunate ligament