Unusual presentation of 'numb chin syndrome' as the manifestation of metastatic adenocarcinoma of the lung.
BACKGROUND
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.


METHODS
This paper presents an unusual case of NCS associated with metastatic adenocarcinoma of the lung, for which no obvious lesion was found in the mandible or base of the skull.


CONCLUSIONS
NCS can oftentimes present itself in the absence of mandibular or base of skull metastatic lesions.


CONCLUSIONS
NCS can be a sign of underlying advanced metastatic malignancy and therefore cannot be ignored and must be investigated fully.
University of Manchester, Room 1.03, Coupland 3 Building, Coupland Street, Manchester M13 5PL, United Kingdom. Electronic address: faz1987@yahoo.com.
Faizan
F
Zaheer
Khurrum
K
Hussain
Jeethendra
J
Rao
Brain metastasis; Mental neuropathy; Numb chin syndrome