Epidermoid cyst of vulva

Introduction to vulvar epidermoid cyst The growth site of vulvar epidermoid cysts is more common in the labia majora and perineum, which occurs in the deep tissues of the vulvar skin or mucosa. The cyst is single or multiple, but it is often misdiagnosed as a sebaceous cyst. In fact, the sebaceous cyst of the vulva is rare, and most of them are epidermal cysts, which are keratin. basic knowledge The proportion of illness: 0.0035% Susceptible people: women Mode of infection: non-infectious complication:

Causes of vulvar epidermoid cyst

(1) Causes of the disease

There are several possibilities for the occurrence of epidermal cysts:

1. Residual tissue from ectoderm differentiated into epidermis.

2. Blockage of the hair follicle sebaceous gland duct.

3. Surgical trauma caused the small epidermis to be implanted into the dermis tissue. This situation is more common in places where there have been surgery, such as perineal incision and suture, and perineal repair.

(two) pathogenesis

The epidermal cyst is composed of epidermis, and its cyst wall includes the spinous cell layer of the epidermis, granulocyte layer and keratinocytes. The outer layer of the cyst wall can also be seen in the epithelial nail. The superficial keratinocytes are often aggregated in the sac, and the wall is cut. Grayish white bean dregs, which are filled with keratin protein and arranged in layers. If the time is longer, the squamous epithelium is pressed into a very thin layer of flat epithelium, sometimes seen in the adjacent tissue of the capsule wall. There is a foreign body giant cell reaction, which is caused by keratinization.

Vulvar epidermoid cyst prevention

Pay attention to the cause prevention and genital hygiene.

Vulvar epidermoid cyst complications Complication

Concomitant infection.

Vulvar epidermoid cyst symptoms Common symptoms Cyst

Slow growth, generally no special symptoms, in the perineal skin or under the skin with a diameter of about 1cm round lumps, single or multiple hair, hard texture, micro-embossed on the skin surface, but the skin surface is non-porous, can move with the skin.

Examination of vulvar epidermoid cyst

Secretion examination, white blood cell count.

Histopathological examination.

Diagnosis and differentiation of vulvar epidermoid cyst

diagnosis

Diagnostics can be made based on clinical manifestations and experimental examinations, and keratinized exfoliation is the basis of diagnosis.

Differential diagnosis

1. vulvar labia majora

The disease is connected with the inguinal ring, which is a reversible mass. When the abdominal pressure increases, the mass may appear, and the extruded mass may disappear into the disease.

2. Vulvar cysts in the vulva

The cyst is mostly located in the hymen, the lateral anterior part of the vestibule, generally small, rarely infected, more asymptomatic, pathological examination can confirm the diagnosis.

3. Vulvar sebaceous cyst

Prone to occur in the labia majora, due to obstruction of the sebaceous gland, cysts and epidermis adhesion, hard, no obvious sac sexy, can squeeze sebum.

4. Vulvar dermoid cyst

Located in the epidermis of the perineal area or under the skin, the texture is soft, the capsule contains sebum or hair, cartilage, bronchial tissue and so on.

5. Vulvar sweat gland cyst

Due to the horny embolization of the epidermis follicles, obstruction of the apocrine gland pores causes a retention cyst, which is generally asymptomatic and slow to grow, without treatment.

6. Vulvar mucus cyst

Located in the vestibule of the vagina or the inside of the labia minora, due to obstruction of the small mucous gland duct of the vestibule of the vagina, the inner wall of the capsule is a high column or cubular glandular epithelial cell.

7. Paraurethral cysts

Mostly located around the urethral urethra of the vaginal vestibule, the volume is small, the cyst wall covering the epithelium is often the metastatic epithelium, and the residual paraurethral gland is visible in the wall.

8. Perineal round ligament peritoneal sheath cyst

Located on the anterior side of the vulva, inside the labia majora, the cyst is derived from the peritoneum and contains clear peritoneal fluid.

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