Fox Fordyce’s disease is a disease of –
**Core Concept**
Fox-Fordyce disease is a rare disorder characterized by the blockage of apocrine sweat glands, leading to the formation of itchy, inflamed bumps on the skin. This condition primarily affects the axillary and anogenital regions. The pathophysiology involves the obstruction of sweat gland ducts by keratinous debris, resulting in inflammation and scarring.
**Why the Correct Answer is Right**
The correct answer is related to the involvement of apocrine sweat glands, which are a type of eccrine gland that becomes active during puberty. These glands are primarily responsible for the production of a milky secretion that helps to repel water from the skin. In Fox-Fordyce disease, the blockage of apocrine sweat glands leads to the accumulation of keratinous debris, causing inflammation and scarring.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because Fox-Fordyce disease does not primarily involve the eccrine sweat glands, which are responsible for thermoregulation.
* **Option B:** This option is incorrect because keratosis pilaris is a different condition characterized by the formation of rough, dry patches on the skin due to the accumulation of keratin.
* **Option C:** This option is incorrect because hidradenitis suppurativa is a chronic skin condition characterized by the formation of painful abscesses and nodules in the apocrine-gland-bearing areas, but it is not the same as Fox-Fordyce disease.
**Clinical Pearl / High-Yield Fact**
Fox-Fordyce disease is often misdiagnosed as other conditions such as eczema, acne, or keratosis pilaris. A key diagnostic clue is the presence of itchy, inflamed bumps in the axillary and anogenital regions that do not respond to conventional treatments for these conditions.
**Correct Answer: D. Apocrine sweat glands.