subcutaneous cyst
Introduction
Introduction Subcutaneous cyst refers to a pathological structure that occurs in the dermis or subcutaneous, has a cystic structure, has a wall outside, and contains liquid or other components. It occurs at any age, and it is more common in the head, arms and back of youth.
Cause
Cause
First, congenital hereditary subcutaneous cyst
Hair root sheath cyst
Is an autosomal dominant inheritance.
2. Multiple lipocytoma
It is autosomal dominant.
3. Dermoid cyst
It is congenital and there is after birth.
4. Penile midline cyst
It is caused by congenital dysplasia.
5. Eruptive sacral cyst
It is considered to be autosomal dominant.
Second, the subcutaneous cyst of unknown cause
1. Myxoid cysts.
2. Millet rash:
The cause of primary disease is unknown, secondary is more common in epidermal bullous relaxation, congenital ectodermal defect, skin grinding.
3. Epidermal cysts.
Examine
an examination
Related inspection
Blood routine fungal histopathology spiral CT examination
Subcutaneous cysts are mostly round in shape with a semi-circular surface. Generally located in the dermis and subcutaneous tissue.
Because of the encapsulation of the wall, the edges are smooth and tidy, and there is less adhesion to the surrounding tissues, so the touch is smooth and elastic and the capsule is sexy.
The surface of the skin is mostly free of inflammation, but has a normal skin color.
General development has limited locality and will not infinitely expand the symptoms of local compression.
Diagnosis
Differential diagnosis
Differential diagnosis of subcutaneous cysts:
First, the cyst located in the dermis
Myxoid cyst
Most occur in women. Skin lesions occur on the dorsal side of the distal knuckles, more single hair, translucent, smooth, soft, skin color.
2. Millet rash
More common in women. The cause of primary disease is unknown; secondary occurs mostly in bullous epidermolysis, congenital ectodermal defect, after skin grinding. Primary skin lesions occur in the eyelids and ankles; secondary lesions occur in the auricle, back of the hand, and forearm. The size of the miliary is large, the quality is hard, and the white sebum is seen.
3. Hair root sheath cyst
In the past, it was called a sebaceous cyst. Middle-aged women are more common, and they occur in the head, which is not easy to distinguish from epidermal cysts. The latter is common in the face and neck.
4. Multiple lipocytoma
Skin lesions occur in the lower chest and the scrotum. Can be single or multiple, in normal skin color or yellow. Soft, small is slightly harder. The contents of the cavity are oily or cheese-like.
5. Epidermal cyst
More common, it happens to young people, children, and old age are rare. Normal skin color, round, elastic, slightly hard. The wall of the capsule is normal skin and the cavity is filled with keratin. It can be single or multiple, often occurring on the scalp, face, neck and trunk.
6. Bronchial origin and thyroid gland catheter cyst
For congenital dysplasia. More common in the sternum notch above the neck or foot. Shortly after birth, more single-shot, less damage, often accompanied by fistula.
7. Penile midline cyst
For congenital dysplasia, more common in young people and children. The lesion is located on the ventral side of the penis, especially the midline of the glans, about a few millimeters in diameter.
8. Eruptive sacral cyst
More common in children and young people, small cystic cysts. The surface may have suede and umbilical fossa. Common in the chest, but also in the limbs, back.
Second, the cyst located in the subcutaneous tissue
Dermoid cysts: there are more than one single after birth. Skin lesions are often located in the midline of the eye, face, and back, and can occur everywhere on the body surface. Its capsule contains various epidermal appendages, such as hair.
Subcutaneous cysts are mostly round in shape with a semi-circular surface. Generally located in the dermis and subcutaneous tissue. Because of the encapsulation of the wall, the edges are smooth and tidy, and there is less adhesion to the surrounding tissues, so the touch is smooth and elastic and the capsule is sexy.
The surface of the skin is mostly free of inflammation, but has a normal skin color. General development has limited locality and will not infinitely expand the symptoms of local compression.
