The function of the facial nerve is best tested by whistling.

Spontaneous bleeding is a key indicator for considering leukemia in differential diagnosis.

Changing kVp from 70 to 80 increases the energy of photons produced significantly.

Diphtheria serious bacterial infection that usually affects the mucous membranes of the nose and throat.

Diphtheria signs and symptoms usually begin 2 to 5 days after a person becomes infected. Signs and symptoms may include:

A thick, gray membrane covering the throat and tonsils
A sore throat and hoarseness
Swollen glands (enlarged lymph nodes) in the neck
Difficulty breathing or rapid breathing
Nasal discharge
Fever and chills
Tiredness

Skin (cutaneous) diphtheria
A second type of diphtheria can affect the skin, causing pain, redness and swelling similar to other bacterial skin infections. Ulcers covered by a gray membrane also may be a sign of skin diphtheria.

Lamina dura is lost or partially lost in hyperparathyroidism.