cyst
Introduction
Introduction A cyst is a benign disease that can grow on the surface of the body or in the internal organs. The cyst has a cystic structure with a wall that contains liquid or other components. It can be derived from the skin or from the mesenchymal tissue. . In general, common cysts include "kidney cysts", "hepatic cysts", "simple ovarian cysts" and "chocolate cysts". Renal cysts are divided into simple isolated renal cysts and polycystic kidney disease. Most of the cysts have a rounded shape and the surface of the skin is semi-circular. Generally located in the dermis and subcutaneous tissue. Because of the wall wrapping, the edges are smooth and tidy, and there is less adhesion to the surrounding tissues. Therefore, the touch is smooth and elastic, and the sac is sexy. The surface of the skin is mostly free of inflammation, and it has a normal skin color. General development of limited nature will not infinitely expand the symptoms of local compression.
Cause
Cause
First, congenital hereditary
1. Hair root sheath cyst: The past 114 degree of adenoid cyst is an autosomal dominant inheritance.
2. Multiple lipocytoma: autosomal dominant inheritance.
3. Dermoid cyst: It is congenital and there is after birth.
4. Bronchial origin and thyroid gland catheter cyst: caused by congenital dysplasia.
5. Penile midline cyst: caused by congenital dysplasia.
6. Eczema charcoal cyst: the cause is unclear, and some reports are considered autosomal dominant inheritance.
Second, the cause is unknown
1. New liquid cysts.
2. Mildew rash: The cause of primary disease is unknown, secondary is more common in epidermis cataract, congenital ectodermal defect, delayed skin leaf disease, skin grinding.
3. Epidermal cyst: The cause is unknown.
Examine
an examination
Related inspection
Microfilaria (Mf) spiral CT examination CT examination of spleen imaging vaginal mass
Most of the cysts are round and the surface of the skin is semi-circular. 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.
B-ultrasound or CT diagnosis of liver cysts is very reliable, generally do not have to do more tests.
Diagnosis
Differential diagnosis
First, located in the dermis
1. a liquid cyst
Most of the female skin lesions in 40-50 years old occur in the dorsal side of the distal knuckles, more single. The size is about 3-15m, translucent, smooth: soft, the skin color cyst cavity is my fluid, which is scattered with stellate fibroblasts.
2. Millet rash
More common in women of any age, the cause of unknown is unknown; secondary occurs mostly in the treatment of sputum epidermolysis, congenital ectodermal defects, delayed skin dermatosis after skin grinding. Primary skin lesions occur in the eyelids and ankles; secondary lesions occur in the auricles of the hands and forearms. The size of the miliary is hard and hard, and the white sebum is seen.
3. Hair root sheath cyst
In the past, middle-aged women called sebaceous cysts were more common in the head, which was not easy to distinguish from epidermal cysts. The latter was common in the face and neck. The wall of the disease is composed of squamous epithelium, similar to the isthmus cells of the hair follicle. The content of the cavity is eosinophilic.
4. Multiple lipocytoma
Can occur in all ages for men and women. Skin lesions occur in the middle and lower part of the chest, and the scrotum can be single or multiple, showing a normal skin color or yellow, ranging from a few millimeters to 1-2 cm in diameter, and slightly smaller. The contents of the cavity are oily or cheese-like.
5. Epidermal cyst
More common occurs in young people, children, the elderly rarely seen in diameter 0.5-5cm, normal skin color, round elastic, slightly hard. The wall of the capsule is filled with keratin in the normal skin cavity. 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 lesions are less common, often accompanied by thin tubes. The performance of the two is similar to the composition of the pseudo-stratified columnar epithelium. It can be seen that the epithelial cells are ciliated in the human cyst.
7. Penile midline cyst
It is more common in young people and children for congenital dysplasia. The lesion is located on the ventral side of the penis, especially the midline of the glans is about a few millimeters in diameter. The wall of the capsule is a pseudo-stratified epithelium, and some of the epithelial cytoplasm is transparent.
8. Eruptive hair loss cyst
More common in children and young people are small cystic cysts, the size is 1-2mm. The surface may have ecstasy and umbilical fossa common in the chest, and also visible in the limbs, the squamous epithelium of the posterior capsule wall, and the lamellar keratin and hair. The wall of the capsule forms a hair follicle-like structure.
Second, located in the subcutaneous tissue
Dermoid cysts: there are more singles after birth. Skin lesions are often located in the midline of the eye and the back of the face, which can occur everywhere on the body surface. The wall of no more than 2 cm in diameter consists of stratified squamous epithelium, but is different from epidermal cyst. The cyst cavity contains various epidermal appendages such as hair, and the hair follicles protrude into the human cavity.
