Which site is commonly described as having the thinnest stratum corneum among heel, scrotum, forearm, and back?

Which site is commonly described as having the thinnest stratum corneum among heel, scrotum, forearm, and back?

• A. Heel
• B. Forearm
• C. Back
• D. Scrotum

Answer: (D)

The scrotum. The thickness of the stratum corneum varies widely across body sites, and the barrier is thinnest in genital skin. Scrotal skin is highly permeable because its stratum corneum is very thin, contrast this with the heel which develops a thick, protective horny layer from repeated friction. The forearm and back have moderate thickness, thicker than the scrotum, leading to lower permeability at those sites. So among the options, the scrotum is described as having the thinnest stratum corneum, making it the site with the least barrier thickness.

The scrotum. The thickness of the stratum corneum varies widely across body sites, and the barrier is thinnest in genital skin. Scrotal skin is highly permeable because its stratum corneum is very thin, contrast this with the heel which develops a thick, protective horny layer from repeated friction. The forearm and back have moderate thickness, thicker than the scrotum, leading to lower permeability at those sites. So among the options, the scrotum is described as having the thinnest stratum corneum, making it the site with the least barrier thickness.