Integumentary.

The epidermis has four layers in most places. In thickened areas like the palms and soles, there is an additional layer: the stratum lucidum. The cells are clear, hence the name lucidum (from "lucid," meaning clear). Stratum corneum, granulosum, and basale are found throughout the skin, not only in thickened areas.

Apocrine glands function as scent glands. They are one of two types of sudoriferous (sweat) glands, along with eccrine glands. Sebaceous glands secrete sebum, an oily waxy substance that lubricates the skin. Ceruminous glands are modified apocrine glands that secrete ear wax. Eccrine glands are sweat glands that help cool the body.

The hypodermis (also called subcutaneous tissue) is the innermost layer. It stores fat, insulates the body, and stores energy. The stratum basale is the innermost layer of the epidermis, not of the entire skin. The dermis is the middle layer. The stratum corneum is the outermost epidermal layer.

The dermis is the middle layer of the skin containing blood vessels and glands. The epidermis is the outermost layer and has no blood vessels. It is nourished by the dermis. The hypodermis (subcutaneous layer) is rich in fat.

Cellulitis is inflammation of the subcutaneous connective tissue. The suffix -itis means inflammation. Folliculitis is inflammation of the hair follicle. Dermatitis is inflammation of the skin ("derma" refers to skin). Hidradenitis results from inflammation of the sweat glands ("adenitis" refers to gland inflammation).

Onycho means pertaining to the nails, and mycosis means fungal infection. Onychomycosis is a fungal infection of the fingernails or toenails. Paronychia (para = around, onychia = nails) is a skin infection around the nails. Pachyderma (pachys = thick, derma = skin) is abnormally thick skin. Dermatomycosis (dermat = skin, mycosis = fungal infection) is a fungal infection of the skin.

Pruritus means itching. Antipruritics are drugs that relieve itching. Anti-inflammatory drugs relieve pain, swelling, and redness from inflammation. Antihistamines treat allergies. Antiseptics are chemical agents that slow or stop microbial growth.

TIS stands for tumor in situ. Dx refers to diagnosis, not disease. PPD refers to purified protein derivative, not purified plasma device. UV refers to ultraviolet, not under view.

A biopsy is an examination of tissue from a living body to discover the presence or cause of disease. A prick test uses tiny needle pricks to determine allergen sensitivity. A Tzanck test uses scrapings to detect conditions like herpes. A wound culture uses tissue or fluid to test for infectious agents such as bacteria or fungi.

Bx is the standard abbreviation for biopsy. The other options are not standard medical abbreviations for biopsy.