Cystic mass

Introduction Cyst is a benign disease, it can grow on the surface of the human body, and it can also grow in the internal organs. The cyst has a cystic structure with a wall outside, with liquid or other components, which can be derived from the skin or from the mesenchymal tissue. . 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

Congenital hereditary

1. Hair root sheath cysts in the past 114 degrees of fat gland cysts, is an autosomal dominant inheritance.

2. Multiple lipomas are autosomal dominant.

3. The dermoid cyst is congenital and is present after birth.

4. Bronchial origin and thyroid gland tube cysts are caused by congenital dysplasia.

5. The penile midline cyst is an autosomal dominant inheritance caused by congenital dysplasia.

an examination

Related inspection

CT examination CT plain CT scan

(1) Examination of urine: normal urine is normal. If the renal parenchyma is compressed in the capsule or combined with intracapsular infection, small amounts of red blood cells and white blood cells may appear in the urine.

(2) B-ultrasound: can understand the number, size, and wall of the cyst, and can be differentiated from the solid mass of the kidney. It is the preferred method of examination. The typical B-ultrasound shows no echo in the lesion area, and the capsule wall is smooth. The boundary is clear. When the wall of the capsule shows irregular echo or limited echo enhancement, it should be alert to malignant changes. When the infection is secondary, the wall of the capsule is thickened, and the lesion has a fine echo. When there is bleeding in the capsule, the echo is enhanced. When there are multiple cysts, it should be distinguished from multi-atrial cysts and polycystic kidneys.

(3) Intravenous pyelography (ivp) can show the degree of cystic compression of renal parenchyma and can be differentiated from hydronephrosis.

Differential diagnosis

1. Department of liquid-like cysts: more than 40-50 years old female skin lesions occur in the distal side of the distal knuckles, more than a single. It is about 3-15m in size and is translucent, smooth and soft, with scattered stellate fibroblasts.

2. Mildew rash: more common in women of any age, the cause is unknown, secondary occurs in the large hernia epidermolysis, congenital ectodermal defect, delayed skin skin grinding Rear. Primary skin lesions occur in the eyelids and ankles, and secondary lesions occur in the back of the auricle and the forearm. The size of the miliary is hard and hard, and the white sebum is seen.

3. Hair root sheath cyst: In the past, it was more common in middle-aged women called sebaceous gland cysts, which occurred in the head and was not easily distinguished from epidermal cysts. The latter was common in the face and neck.

4. Multiple lipoma: can occur in men and women of all ages. 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.

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