Diagnostic dilemma: a typical follicular adenoma mimicking poorly differentiated thyroid carcinoma

Introduction and importance: Thyroid disorders encompass a diverse range of conditions, including benign adenomas and malignant carcinomas. Atypical follicular adenomas represent a subset that presents diagnostic challenges due to their ambiguous features. Given the thyroid gland’s proximity to critical structures, prompt and accurate diagnosis is imperative for optimal management. Case presentation: This case report details the clinical journey of a 58-year-old male presenting with an anterior neck swelling and hoarseness of voice. Following a right hemithyroidectomy, histopathological examination revealed an atypical follicular adenoma. However, subsequent developments, such as persistent hoarseness, contralateral thyroid lobe enlargement, and cervical lymphadenopathy, necessitated further investigation. Clinical discussion: The complexities of diagnosing and managing thyroid lesions, especially those with atypical features and postoperative complications, are discussed. Differential diagnoses and investigative strategies are explored within the context of this case, highlighting the challenges encountered in clinical practice. Conclusion: This case underscores the intricate nature of thyroid pathology and the importance of comprehensive evaluation in guiding clinical decision-making. Despite initial histopathological findings, ongoing vigilance and thorough assessment are crucial for identifying and addressing evolving clinical presentations in patients with thyroid disorders.