Figure 1.

Warm and cold sensation thresholds, in our patient, showed mild small-fibers impairment while cold and heat pain thresholds were significantly lowered, consistently with thermal hyperalgesia. The vertical axis shows temperature (°C). The horizontal axis shows the temperature at which the patient refers to, from the left to the right, cold sensation (blue), warm sensation (red), cold pain (blue), and heat pain (red); the exclamation point “!” means the temperature sensation is over the normality threshold. The mean value for the cold sensation threshold: 28.3 °C; The mean value for the warm sensation threshold: 35.4 °C. The mean value for cold pain: 29.8 °C; The mean value for heat pain: 35.9 °C.