Primary thyroid lymphoma is rare (<2% of thyroid malignancies), but it is crucial to recognize because management is very different from other thyroid cancers.
🧠 Key features
Arises from lymphoid tissue within the thyroid Strongly associated with Hashimoto’s thyroiditis Often presents with rapid thyroid enlargement over weeks Symptoms may include neck pressure, difficulty swallowing, or breathing changes
🔍 How is thyroid lymphoma diagnosed?
Ultrasound may show a diffusely enlarged, hypoechoic thyroid CT/MRI helps assess airway compression and extent Core needle biopsy (or surgical biopsy) is usually required FNA alone may be insufficient for definitive diagnosis
⚖️ How is it treated?
Unlike most thyroid cancers, surgery is NOT the main treatment.
Management typically includes:
Chemotherapy Radiation therapy Multidisciplinary care with medical oncology and radiation oncology
➡️ Surgery is reserved for airway compromise or diagnostic uncertainty.
📈 Prognosis
Depends on histologic subtype (e.g., MALT vs diffuse large B-cell) Many patients, especially with indolent subtypes, have excellent outcomes with appropriate therapy
🦋 Early recognition prevents unnecessary thyroid surgery and enables prompt, effective treatment.
👨⚕️ Dr. Rodrigo Arrangoiz, MD
Surgical Oncologist – Thyroid, Head & Neck, Breast
📌 Take-home message:
A rapidly enlarging thyroid—especially in patients with Hashimoto’s—should raise suspicion for thyroid lymphoma and prompt specialist evaluation.
📚 References
Derringer GA et al. Primary thyroid lymphoma. Am J Surg Pathol Stein SA et al. Thyroid lymphoma. Endocrinol Metab Clin North Am NCCN Guidelines: B-Cell Lymphomas
Rodrigo Arrangoiz MS, MD, FACS, FSSO 