Numb chin syndrome with metastatic malignancy in hyperparathyroidism : Case report

Abstract

Numb chin syndrome (NCS) is sensory neuropathy characterized by numbness in the chin and lower lip, involving distribution of the mental nerve. Causes of NCS may be of regional origin, a systemic disease, and malignancy. In this study, we report a case of NCS occurring as a first symptom of malignant metastasis in a 57-year-old female patient diagnosed with hyperparathyroidism.