Oncology!

Lipoma

lipoma

A benign tumor formed by the proliferation of mature adipose tissue. It is more common in adults aged 40 to 50 years. The tumor is soft, round or lobulated, located under the skin and can be pushed; the tumor size varies, the small one is as big as a jujube and can only be palpated by touching it, and the large one can bulge the skin surface, but the surface skin is normal. Tumors may be single or multiple and may appear in any part of the body surface, with the shoulders, back, and abdomen being the most common. Most have no symptoms. Angiolipoma is a special type of lipoma, which is more common in young people. It usually occurs in the lower limbs and can cause pain and tenderness when touched. During histopathological examination, in addition to large areas of mature fat cells, many proliferated blood vessels can be seen in the tumor, and the boundaries of the entire tumor are clear. Lipomas rarely become cancerous and generally do not require treatment; if the tumor is large, affects movement, or suddenly grows or ulcers in the near future, it should be surgically removed.

Overview

Lipoma is a benign tumor that mostly occurs under the skin. There is a thin layer of connective tissue capsule around the tumor, which contains normal fat cells divided into leaf-like groups by connective tissue bundles. In addition to a large amount of adipose tissue, some lipomas also contain a large amount of connective tissue or blood vessels, forming complex lipomas.

Lipoma is composed of mature adipose tissue. It is more common in children than fibroma and can occur anywhere in the body where fat exists. Lipoma has a thin fibrous intima containing many fibrous cords, forming many intervals vertically and horizontally. It is most common in the subcutaneous tissue of the neck, shoulders, back, buttocks, breasts and limbs, face, scalp, scrotum and labia, followed by the peritoneum. Posterior and gastrointestinal walls, etc.; very few may appear in areas that were originally free of fat tissue. If the tumor contains a large proportion of fibrous tissue, it is called fibrolipoma.

Cause of lipoma

There is a thin layer of connective tissue capsule around the tumor, which contains normal fat cells divided into leaf-like groups by connective tissue bundles. In addition to a large amount of adipose tissue, some lipomas also contain a large amount of connective tissue or blood vessels, forming complex lipomas.

Symptoms of lipoma

This type of tumor commonly occurs on the shoulders, back, buttocks and inner thighs, and is also common on the head. Lipomas located in the subcutaneous tissue vary in size, and most are oblate or lobed, with clear boundaries. If the boundaries are unclear, beware of the possibility of malignant lipoma. The tumors are soft and elastic (note the difference from larger cysts), and some may have a false sense of fluctuation. The tumor is not adherent to the epidermis, the skin surface is completely normal, and the base is broad. During the examination, the base of the lipoma is pressed tightly with the hand, and the lobulated shape can be seen. The skin may appear "orange peel"-like. Tumors develop very slowly, most of them have no serious adverse effects on the body, and malignant transformation is rare.

In addition, there is another type of multiple round or oval nodular lipoma, which is common under the skin of the limbs, waist, and abdomen. The size and number of the tumors are variable, they are slightly harder than ordinary lipomas, and they are painful when pressed, so they are called painful lipomas or multiple lipomas. Lipoma is a tumor of normal fat-like tissue. It usually occurs on the limbs and trunk and generally causes no pain or other discomfort. Lipomas grow slowly. Multiple lipomas are generally smaller in size, softer in texture, and may have a pseudocystic feel. Lipomas often occur in multiple locations and have a family history. If there are no obvious symptoms, no treatment is required. Surgical resection is only required when the following conditions occur and there is a possibility of malignant transformation: there is local pain and discomfort; the tumor is large and affects the appearance or the tumor affects the activity function of the limbs; the tumor grows faster and larger, and malignant transformation is suspected; Solitary lipomas occur in deeper areas.

Lipoma is not liposarcoma. Liposarcoma is a highly malignant tumor that grows rapidly, has a large tumor body, is hard in texture, and is mostly solitary

Supplement :

Treatment principles

1. Small (within 1cm in diameter) and multiple lipomas generally do not require treatment. 2. Larger cases should undergo surgical resection.

Auxiliary examination

1. The diagnosis of this disease is mainly based on symptoms and physical examination. Especially the surface characteristics of the mass. 2. In order to differentiate from other diseases, the examination project may include examination box "B".

Effectiveness evaluation

Cure: The tumor is completely removed and there is no recurrence.