1. Liquid-like cyst in this part
Lesions mostly occur in women aged 40-50, mostly in the dorsal phalanx. It is about 3- 15m in size, translucent, smooth and soft. The capsule cavity is my fluid, and there are scattered stellate fibroblasts in it.
2. Millet papules are common in women of any age, and the cause is unknown; Secondary cases mostly occur after skin grinding for giant epidermolysis, congenital ectodermal defect and delayed cutaneous Carlin's disease. Primary skin lesions are common in eyelid and zygomatic region. Secondary cases are more common in the back of auricle and forearm. Millet size, big and hard, broken can also see white sebum-like substances.
3. Hair root sheath cyst was formerly called sebaceous cyst, which is more common in middle-aged women, and it is easy to distinguish from epidermal cyst, and is common in face and neck. The cyst wall of this disease is composed of squamous epithelium, which is similar to the isthmus cells of hair follicles. The contents of the cavity are eosinophils.
4. Multiple liposarcoma
It can occur in all ages and can be seen by both men and women. Skin lesions are common in the middle and lower part of the chest, and scrotum can be single or multiple, with normal skin color or yellow color, a diameter of several millimeters to 1-2 cm, and soft and slightly hard. The contents of the cavity are oily or cheese-like.
5. Epidermal cyst
More common in young people, children and the elderly, with a diameter of 0.5-5 cm, normal skin color, round elasticity and slightly hard texture. The capsule wall is normal skin and the capsule cavity is filled with keratin. It can be single or multiple, and it occurs in scalp, face, neck and trunk.
6. Bronchial and hyoid tube cysts are congenital developmental abnormalities, which are more common in the front of the neck or the foot above the sternal notch. It occurs shortly after birth, and multiple single lesions are small, often accompanied by tubules. Their performance is similar, the capsule wall is composed of pseudo-stratified columnar epithelium, and the cilia of epithelial cells extend into the human capsule cavity.
7. Penile midline cyst
Congenital dysplasia is common in young people and children. Skin lesions are located on the ventral side of penis, especially the diameter of the glans penis midline is about several millimeters. The cyst wall is pseudostratified epithelium, and some epithelial cells are transparent.
8. Eruptive alopecia cyst
Most common in children and young people, it is a small follicular cyst with a size of 1-2mm. There may be silly skin and umbilical fossa on the surface, which are common in the chest and can also appear in the connected limbs. The posterior capsule wall is squamous epithelium, and the capsule cavity is lamellar keratin and synthetic hair. The capsule wall is depressed to form a hair follicle-like structure.
Second, dermoid cyst located in subcutaneous tissue: mostly single cyst after birth. Skin lesions are often located around the eyes, facial midline and abdomen, and can occur anywhere on the body surface. The cyst wall with a diameter less than 2 cm is composed of stratified squamous epithelium, but it is different from epidermal cyst. Its capsule cavity contains various epidermal appendages, such as hair, and hair follicles containing hair extend into the human body cavity.