The suppression test of low-dose dexamethasone is a dependable way for the differential diagnosis between hypernephroma and simple obesity.

Mathematical equations, from simple algebraic ones to the more challenging differential equations, have allowed us to summarize an enormous amount of physical phenomena into a simple format.

CONCLUSION: the computerized near infrared scan is a simple, non trauma and effective method in the differential diagnosis of the breast cancer and is clinically helpful in the early stage diagnosis.