Common<unk> s have a characteristic appearance under the microscope. They have thickening of the stratum corneum (hyperkeratosis), thickening of the stratum spinosum (acanthosis), thickening of the stratum granulosum, rete ridge elongation, and large blood vessels at the dermoepidermal junction.
Wart
Callus
Whitlow
Seborrheic keratosis
Drustbed
Squamous cell carcinoma
Flashblood
Squamous cell skin cancer