What is the protruding bone on the top of the head called

Although the head is a relatively hard part of our body, it is also the part most vulnerable to fatal injuries, and we must always pay attention to changes in the top of the head, but what is the name of the protruding bone on the top of the head? It is best to seek medical treatment for this phenomenon in a timely manner, and pay more attention to whether the bone hyperplasia is caused by trauma. If you feel any discomfort or have a hematoma, you should go to the hospital for examination in time.

Scalp hematoma is mostly caused by blunt trauma to the scalp. According to the specific layer of the scalp where the hematoma appears, it can be divided into three types: subcutaneous hematoma, subgaleal hematoma and subperiosteal hematoma. Generally, smaller scalp hematomas do not require special treatment and can be absorbed on their own after 1 to 2 weeks. Larger hematomas often require puncture and extraction while applying local compression and bandage. If puncture treatment is ineffective, the hematoma does not disappear or continues to increase, an incision can be performed to remove the hematoma and stop the bleeding. For subperiosteal hematoma combined with skull fracture, attention should be paid to the possibility of concurrent intracranial hematoma. All infected hematomas require incision and drainage.

Causes

Scalp hematoma is mostly caused by blunt trauma to the scalp.

Clinical manifestations

1. Subcutaneous hematoma

Because the subcutaneous tissue layer is closely connected to the skin layer and the galea aponeurotica layer, the hematoma in this layer is not easy to spread. The tissue around the hematoma is swollen and thickened, and feels sunken when touched, which can easily be misdiagnosed as a depressed skull fracture. Sometimes a skull X-ray is needed to rule out the possibility of a fracture.

2. Subgaleal hematoma

Caused by the rupture of a small artery or blood vessel. Because the tissue under the galea aponeurotica is loose, blood can easily spread in all directions. The blood can fill the entire subgalea aponeurotica, significantly enlarging the top of the head, and the blood volume can reach hundreds of milliliters.

3. Subperiosteal hematoma

It is more common after the head is significantly deformed due to blunt trauma, such as birth injuries in newborns, ping-pong ball-like depressed skull fractures in infants and young children, and linear skull fractures in adults. Bleeding occurs due to local periosteal stripping. Since the periosteum is firmly attached to the cranial sutures, the range of the hematoma usually does not exceed the cranial sutures. In infants, the periphery and periosteum of old hematomas may thicken or ossify, forming bone cysts containing old blood.