A corn is a focal, hard, cone-shaped hyperkeratosis over a pressure point, not the malodorous, "punched-out" pits seen in this bacterial infection.
This is characterized by a shiny, glazed erythema on the weight-bearing surfaces of the feet, a different appearance than the discrete pits of pitted keratolysis.
Plantar psoriasis presents as well-demarcated, silvery-scaled plaques, not as superficial pits.
Tinea pedis is a fungal infection causing scaling, maceration, or vesicles, but not the characteristic punched-out pits of pitted keratolysis.
This is a diffuse, inherited thickening of the soles, not a superficial infection causing pits.
