A 60-year-old woman comes to the physician because of

a 4-week history of a severely itchy rash. She initially noticed

a small, itchy bump that gradually became a generalized rash. She reports that

the itching is extremely bothersome and often wakes her up at night. Yesterday,

she also noticed a lump in the left axilla. Examination shows diffuse reddening

of the skin with fine scales involving the neck, shoulders, back, abdomen,

and extremities. The nails appear normal. A peripheral blood smear shows

significant multiplication of one cell type which is shown in the picture. Which

of the following cell types is it?

During the acute operation of a patient after a

traffic accident and after repeated unsuccessful intubation, an acute coniotomy

is performed (cutting the conic ligament and securing the airway through this

opening in the larynx). This is subsequently replaced by a tracheotomy due to

the expected long-term artificial lung ventilation. During this procedure, 2-3

cartilaginous rings of the trachea are cut. What type of cartilage is here?