Mesenchymal tumor
First, benign mesenchymal tumor

This type of tumor with a high degree of differentiation and maturation of its organizational structure, cell shape, color and so hard and with its high-origin similar to that of normal tissue. Slow tumor growth, expansion was a long, usually coated with. It is presented in outline of the more common types:

1. Fibroids (fibroma) tumor tissue collagen fiber bundles line, weaving with each other, with slender fiber between the fiber cells (Figure 7-15). Was the appearance of nodular, with clear boundaries around the organization, there are coated. Off-white section, we can see the weaving-like stripes, tough hard texture, commonly found in the skin of the limbs and trunk. This slow-growing tumor, is no longer relapse after surgery to remove.

Tumor-like proliferation of fibrous tissue: fibrous connective tissue showed tumor-like proliferation, the formation of tumor-like mass, also known as fibromatosis (fibromatosis). It includes a wide range of about a dozen. There are common nodular fasciitis, proliferative fasciitis, myositis and the proliferation of tumors, such as band. Tumor-like fibrous tissue hyperplasia and fibroids The difference is that local invasive growth was no envelope. In addition to the fibroblast see, still see a lot of myofibroblastic, and sometimes fibroblast proliferation more active, rich in cells, even with mild hypertrophy of nuclear atypia and a small number of nuclear fission as a normal, not completely removed when they can relapse many times, but Do not transfer. The most important thing is not to be misdiagnosed as malignant tumors. According to such types of lesions, can be found in infants, children and adults, can occur in any part of the soft tissue, but to occur in the limbs and the abdominal wall skin, fascia, muscle, etc. are more common.

2. Lipoma (lipoma) for the most common site of back, shoulder, neck and limbs of the proximal subcutaneous tissue. Look for round or flat lobulated, capsule, soft texture, light yellow face cut, like a normal adipose tissue. Tumor size in diameter from a few centimeters to tens of centimeters range, often single, can also make use of multiple. Under normal adipose tissue structure and the main difference is that there is coated. Leaf size of the tumor at irregular, and there is inequality between the existence of fibrous tissue. Lipoma generally no symptoms, but also caused localized pain, rarely malignant, surgical removal easy.



Figure 7-15 fibroids

By the well-differentiated tumor cells of fiber, were arranged like weaving, is rich in collagen fiber

3. Vascular tumor blood vessels can be divided into tumors (hemangioma) and lymphangioma (lymphangioma) categories. Among them, the most common tumor blood vessels, mostly congenital occur, it is common in children. Can be born in the hemangioma any site, but mostly for the skin. Into the general capillary hemangioma (posed by the proliferation of capillaries) (Figure 7-16), cavernous angioma (posed by the expansion of the sinus) and mixed hemangioma (that is, two changes in both) of the three. To the naked eye, there is no packet loss, was invasive growth. In the skin or mucous membrane processes can show the new bright red mass, or were only Anhong or purple-red spots. Visceral vascular tumor-like nodules mostly. Occurred in the soft tissue diffuse cavernous hemangioma can cause limb hypertrophy. Hemangioma with the general development of the body and grown up, adult immediately cease the development, or even spontaneous regression.



Figure 7-16 capillary hemangioma

The main tumor from a large number of capillary proliferation poses, seen transluminal part of the capillary red blood cell

Lymphangioma by the proliferation of lymphatic structure, containing lymph. Lymphatic vessels were to each other and the expansion of cystic integration, including a large number of lymph, known as cystic hygroma, the tumor found in children.

4. Leiomyoma (leiomyoma) up to be found in the uterus, followed by stomach. Tumor tissue from more or less the same form of spindle smooth muscle cells. Cells arranged in bundles, each weaving, rod-shaped nuclear Cheng Zhang, blunt at both ends of a round, with a bouquet of nuclear arranged grid-like at times, rare as nuclear fission.

5. Osteoma (osteoma) of the tumor occurred in Head and jaw bone, bone may also be involved, the formation of local uplift. Microscope by mature bone, but the loss of normal bone structure and direction of the order. Osteoma occurs in the inside of the skull plate can be convex to Lu Qiang, causing cranial nerve compression symptoms; occurred in the eyes, sinuses or jaw can cause symptoms of the corresponding parts of oppression.

6. Chondroma (chondroma) cartilage from the film took place, said exogenous chondroma; occurred in a short hand-foot-long bone and the bone, and so are the backbone of the bone marrow cavity known as endogenous chondroma. With sharp eyes, the former protruding from the surface of bone, often sub-leaf; the latter so that the expansion of the bone, outside the thin shell of bone. Cheng Dan cut blue or silver-white, translucent, there may be calcification or cystic changes, including mucus. See endoscopic tumor from mature hyaline cartilage, was irregular lobulated, each of the lobular loose from the stromal vascular fiber wrapping. Pengu located in the tumor, sternum, ribs, vertebrae, or long bone easily when malignant; occurred in the means (toe) are rare malignant bone.