Neuropathy of the mental nerve, also referred to as numb chin syndrome (NCS), is a rare finding that demands for accurate differential diagnosis and therapy. This is a report of two patients with a history of colonic cancer, who experienced a progressive hypaesthesia of one side of the corner of the mouth, lower lip and chin, associated with intermittent phases of pain some weeks prior to admis...

A51-year-old woman with breast cancer presented with progressive numbness and burning in the right lower gum and oral mucosa. Neurologic examination was normal except for reduced sensation in the right lower gum region. Inferior alveolar neuropathy from mandible metastasis was diagnosed (figures 1 and 2). “Numb chin syndrome” is characterized by decreased sensation in the chin or lower lip, ora...

N umb chin syndrome is a sensory neuropathy caused by compromise of the mental nerve, the posterior branch of the inferior alveolar nerve, which leads to numbness or tingling in its respective distribution. Th ere is no loss of motor function, as the inferior alveolar nerve contains no motor fi bers. While associated with certain benign etiologies (1–3), the condition is increasingly reported a...

Neuropathy of the mental nerve is a rare condition that demands accurate differential diagnosis. A 69-year-old male experienced progressive hypoaesthesia of the right side of the corner of the mouth and chin, associated with intermittent phases of pain. Plain radiographs and computerised tomography (CT) scans revealed the mental foramen on the top of the toothless mandible and a symmetrically d...

INTRODUCTION Numb chin syndrome (NCS) is the presence of hypoaesthesia or paraethesia of the lip and chin over the distribution of the mental nerve. It is often caused by the presence of a metastatic tumour in the mandible or the base of skull and represents advanced malignancy. PRESENTATION OF CASE This paper presents an unusual case of NCS associated with metastatic adenocarcinoma of the lu...