Diagnostic feature of parathyroid carcinoma is ?: (A) Cytology, (B) Metastasis, (C) Clinical features, (D) All
Answer is B. Ans. is 'b' i.e., Metastasis There is general agreement that a diagnosis of parathyroid carcinoma based on cytological detail is unreliable, and invasion of surrounding tissues and metastasis are the only reliable criteria". Robbins