Neck Swellings
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Direct answer
Midline or lateral — that single question sorts every neck swelling into its shortlist before a finger touches the lump. Midline swellings include the thyroglossal cyst (moves on tongue protrusion), dermoid cyst, submental node, goitre arising from the isthmus, and bony or laryngeal swellings; lateral swellings divide into congenital (branchial cyst, cystic hygroma), vascular (carotid body tumour, aneurysm), salivary (submandibular gland), nodal (inflammatory, tuberculous, lymphomatous, metastatic) and abscesses. In Indian surgical practice, tuberculous lymphadenitis is a daily diagnosis — matted nodes progressing through solid, cystic, collar-stud abscess and sinus stages — while a hard node above 40 in a tobacco user is metastatic carcinoma until excluded. Examination follows the swelling routine (site, size, shape, skin, surface, edge, temperature, tenderness, consistency, fluctuation, translucency, mobility, relations to sternomastoid and swallowing), then FNAC usually settles the diagnosis.
What you must remember
- The triage tree: midline — thyroglossal cyst, dermoid, submental node, thyroid isthmus, adam's apple swelling; lateral — nodal masses, branchial cyst, cystic hygroma, carotid body tumour, submandibular salivary lesions, abscess; the sternomastoid is the horizontal divider for deep swellings.
- Congenital trio with signatures: thyroglossal cyst — midline, moves on tongue protrusion (tract to foramen caecum), treated by Sistrunk operation; branchial cyst — lateral, anterior border of upper third of sternomastoid, in young adults; cystic hygroma — posterior triangle of infants, brilliantly transilluminant, lymphatic malformation.
- Carotid body tumour (chemodectoma): firm lateral swelling at the level of the hyoid that moves horizontally but not vertically, may transmit pulsation and bruit — biopsy is contraindicated; imaging and excision in a vascular setup.
- Nodal diagnosis by feel: tuberculous — matted, firm, often with a collar-stud abscess or sinus; lymphoma — rubbery, large, painless; metastatic — hard, fixed, painless; chronic septic — tender, mobile; the six levels (I submental-submandibular, II upper jugular, III middle jugular, IV lower jugular, V posterior triangle, VI central compartment) localise the source.
- Tuberculous lymphadenitis staging: stage 1 enlarged solid nodes, stage 2 caseating matted nodes, stage 3 collar-stud abscess, stage 4 sinus — antitubercular therapy per NTEP for 6 months is the mainstay, with aspiration or excision of abscessed disease.
- Red-flag triad: hard fixed node, age above 40, tobacco or alcohol history — think metastatic squamous carcinoma from an occult oral, oropharyngeal or thyroid primary; unilateral effusion? no — proceed to FNAC and primary search.
- Investigation pathway: ultrasound first for structure and relationships, FNAC as the workhorse (excision biopsy when lymphoma is suspected, as architecture matters), tuberculin test or IGRA plus CBNAAT on aspirate in suspected TB, CT for deep or vascular lesions.
Palpating with a plan: three lumps worked through
First, a 16-year-old boy with a soft midline swelling just below the hyoid that rises when he sticks his tongue out: thyroglossal cyst — infection risk and the possibility of later malignancy justify the Sistrunk operation, removing the cyst with the central hyoid body and the tract up to the foramen caecum, because tract remnants otherwise guarantee recurrence. Second, a 24-year-old woman with a week-old tender swelling at the jugulodigastric point, fever and a sore throat: acute reactive lymphadenitis from a throat or dental infection — treat the source, and the node melts; if it persists weeks or suppurates, aspiration and culture settle it. Third, a 48-year-old man with khaini habits and a hard 3 cm level II node with a normal-looking mouth: metastatic carcinoma until an anaesthetised examination with mirror or nasendoscopy, directed biopsies of the tongue base, tonsil and nasopharynx, and contrast CT prove otherwise — the discipline of hunting the primary before attacking the node, because the node is a signpost, not the disease.
How the exam frames it
Short notes repeatedly asked from this topic include the differential diagnosis of midline neck swellings, thyroglossal cyst versus branchial cyst, cervical tuberculous lymphadenitis, and the levels of cervical lymph nodes — the level numbering is a favourite objective question. The clinical viva places a swelling and expects the structured routine plus two discriminating signs: does it move on swallowing (thyroid), on tongue protrusion (thyroglossal), is it cystic and transilluminant (hygroma), hard and fixed (carcinoma), or matted (tuberculosis). Indian examiners routinely add the public-health angle: tuberculous cervical nodes are the commonest cause of chronic neck swelling in young Indian women, and the answer must name the National Tuberculosis Elimination Programme regimen, not just the drugs.
Frequently asked questions
How is a thyroglossal cyst distinguished from other midline swellings?
It is a midline cystic swelling over the thyroglossal tract that classically moves upward on tongue protrusion, a sign shared by no other common midline lump.
What are the six levels of cervical lymph nodes?
Level I submental and submandibular, II upper jugulodigastric, III mid-jugular, IV lower jugular, V posterior triangle including supraclavicular, VI central compartment nodes.
How does tuberculous cervical lymphadenitis evolve?
From enlarged solid nodes through matting and caseation to a collar-stud abscess and finally a discharging sinus — the four stages every Indian surgical viva expects by number.
Which neck swelling must never be biopsied percutaneously?
A suspected carotid body tumour — biopsy risks catastrophic bleeding; the diagnosis is made on imaging (classically a tumour splaying the carotid bifurcation) and confirmed after safe excision.
What does a hard fixed supraclavicular node usually signify?
Metastatic carcinoma — classically from the stomach or lung on the left (Virchow node), or from an occult head and neck primary at higher jugular levels, demanding a primary search with FNAC first.