Thyroid Swelling - Clinical Case Presentation

Case Vignette (Model Presentation)

History of Presenting Illness (HOPI)

• No dysphagia (esophageal compression)
• No dyspnea, stridor, or breathing difficulty (tracheal compression)
• No hoarseness of voice (recurrent laryngeal nerve involvement - important red flag for malignancy)
• No choking sensation
• No facial puffiness or venous engorgement on raising the arms (Pemberton's sign - substernal extension)

Negative History (Key Pertinent Negatives)

1. Symptoms of Hyperthyroidism (All Denied)

• No palpitations or racing heartbeat
• No heat intolerance or excessive sweating
• No unexplained weight loss despite good appetite (increased appetite)
• No tremors of hands
• No nervousness, irritability, or anxiety
• No loose motions or increased frequency of stools
• No menstrual irregularities (oligomenorrhea/amenorrhea in females)
• No exophthalmos or eye irritation (proptosis - specific to Graves' disease)
• No proximal muscle weakness or fatigue

2. Symptoms of Hypothyroidism (All Denied)

• No weight gain
• No cold intolerance
• No constipation
• No lethargy, tiredness, or somnolence
• No dry skin, hair loss, or brittle nails
• No hoarse voice or deepening of voice
• No puffiness of face or periorbital edema
• No menorrhagia (heavy periods)
• No memory impairment or cognitive slowing
• No depression

3. Features Suggesting Malignancy (All Denied) - Critical Negatives

• No hoarseness of voice - hoarseness implies recurrent laryngeal nerve (RLN) involvement by malignancy
• No rapid increase in size - a rapidly growing nodule raises concern for anaplastic carcinoma or lymphoma
• No pain - thyroid nodules are typically painless; pain suggests hemorrhage into a nodule, thyroiditis, or malignancy (medullary thyroid cancer may cause dull aching)
• No dysphagia - if present, suggests esophageal/tracheal involvement
• No neck lymph node swelling - lateral cervical lymphadenopathy ipsilateral to the nodule strongly suggests papillary thyroid carcinoma
• No bone pains or cough - distant metastases to bone or lungs
• No history of head/neck radiation exposure in childhood - ionizing radiation to the neck before age 18 markedly increases malignancy risk (40% chance of cancer in such nodules); this includes mantle radiation for Hodgkin's disease, radiation for tinea capitis, enlarged tonsils/adenoids, acne

4. Family History

• No family history of thyroid cancer in two or more first-degree relatives
• No family history of MEN type 2 (medullary thyroid cancer association)
• No family history of Cowden's syndrome, familial adenomatous polyposis, Carney complex, or PTEN hamartoma tumor syndrome
• No family history of Graves' disease or autoimmune thyroid disease

5. Drug and Dietary History

• No intake of goitrogenic drugs (lithium, amiodarone, antithyroid drugs, iodine-containing contrast)
• No excessive consumption of goitrogenic foods (cruciferous vegetables - Brussels sprouts, cabbage, cauliflower; cassava root) in large, regular quantities
• No iodine supplement use

6. Menstrual and Obstetric History (in females)

• No current pregnancy (iodine demands increase in pregnancy, increasing goiter risk)
• Regular menstrual cycles (irregular cycles raise suspicion of hyper/hypothyroid state)

7. Past Medical History

• No prior thyroid disease or thyroid surgery
• No prior neck surgery or irradiation
• No known autoimmune disease (rheumatoid arthritis, SLE, Type 1 diabetes - associated with autoimmune thyroiditis)

8. Socioeconomic and Geographic History

• Enquire about iodized salt use (iodine-deficient regions have higher rates of endemic goiter)
• No travel to or residence in nuclear fallout areas

Physical Examination Highlights

• Size, symmetry, consistency (soft, firm, hard, nodular)
• Tenderness (absent in simple goiter, present in thyroiditis)
• Mobility with swallowing - confirms thyroid origin
• Surface: smooth (diffuse goiter) vs. nodular
• Whether the lower border is palpable (if not, suspect substernal extension)
• Regional lymph nodes - must be examined in all cases

Summary of Likely Diagnosis

• Young female
• Painless, smooth, slowly enlarging anterior neck swelling
• Moves with swallowing
• Clinically euthyroid
• All negative findings above

1. Multinodular goiter
2. Graves' disease (toxic goiter)
3. Hashimoto's thyroiditis
4. Follicular adenoma (solitary nodule)
5. Thyroid carcinoma (papillary most common)
6. Thyroglossal cyst (moves with protrusion of tongue, not just swallowing)
7. Subacute (De Quervain's) thyroiditis (painful, tender, post-viral)