Cysts with thin walls and colorless fluid

Introduction The cyst is thin and contains a colorless liquid, so the light transmission test is positive. Puncture can be pumped out of the grass yellow transparent and easy to coagulate liquid, cholesterol crystals, the nature and lymph fluid are exactly the same is the diagnosis of cystic water tumor is mainly based. Most of the neck masses that can be seen at birth are mostly found in the posterior border of the sternocleidomastoid muscle. The posterior cervical collar is a good site, and a few can occur in the anterior triangle. The protruding skin is generally 4 to 6 cm in diameter, smooth and soft, with obvious undulation, no tenderness, and many unclear edges. The covered skin may be unchanged or pale blue due to subcutaneous fluid accumulation.

Cause

In the congenital malformation of lymphoid tissue, the junction of the internal jugular vein and the subclavian vein expands to form a cystic cavity called the cervical sac. Part of the lymphatic system develops from the cervical sac. During the development of the embryo, if a part of the lymphoid tissue disappears and remains embryonic, it continues to develop and enlarge. It contains the lymphatic fluid and the multi-sac sac with the endothelium. It forms a cystic water tumor.

an examination

Related inspection

CT examination CT plain CT scan

Most of the neck masses that can be seen at birth are mostly found in the posterior border of the sternocleidomastoid muscle. The posterior cervical collar is a good site, and a few can occur in the anterior triangle. The protruding skin is generally 4 to 6 cm in diameter, smooth and soft, with obvious undulation, no tenderness, and many unclear edges. The covered skin may be unchanged or light blue due to subcutaneous fluid accumulation. Positive.

When the water tumor is too large, the head and neck activities are limited. The inward expansion of the water tumor can compress the throat and the trachea, causing difficulty in breathing. If the water tumor located in the anterior triangle of the neck protrudes upward from the bottom of the entrance cavity, it can affect the chewing and swallowing movement. Water sac tumors have the potential and long-term slow growth characteristics. When the upper respiratory tract infection occurs, the water tumor can suddenly increase. This may be caused by the infection causing obstruction of the lymphatic vessels and causing the lymph to flow back into the cyst. Mild trauma caused by internal bleeding can also suddenly increase the water tumor. Cystic hydromas also have the property of "invasive" growth along the vascular nerve, but rarely cause compression symptoms.

Differential diagnosis

1. Cystic tumor infection: A mild upper respiratory tract infection or local minor injury can cause cystic tumor infection. At this time, there may be local and systemic infection symptoms, which are difficult to control.

2. Cystic tumor hemorrhage: Local infection and injury can cause sudden increase of cystic hemorrhage cyst, and increase intracapsular tension, which may cause symptoms of tracheal and esophageal compression.

3. Tracheal compression: The saccular lymphangioma under the fascia extends to the mediastinum, or the cystic hemorrhage can cause compression of the trachea, causing dyspnea in children.

Most of the neck masses that can be seen at birth are mostly found in the posterior border of the sternocleidomastoid muscle. The posterior cervical collar is a good site, and a few can occur in the anterior triangle. The protruding skin is generally 4 to 6 cm in diameter, smooth and soft, with obvious undulation, no tenderness, and many unclear edges. The covered skin may be unchanged or light blue due to subcutaneous fluid accumulation. Positive.

When the water tumor is too large, the head and neck activities are limited. The inward expansion of the water tumor can compress the throat and the trachea, causing difficulty in breathing. If the water tumor located in the anterior triangle of the neck protrudes upward from the bottom of the entrance cavity, it can affect the chewing and swallowing movement. Water sac tumors have the potential and long-term slow growth characteristics. When the upper respiratory tract infection occurs, the water tumor can suddenly increase. This may be caused by the infection causing obstruction of the lymphatic vessels and causing the lymph to flow back into the cyst. Mild trauma caused by internal bleeding can also suddenly increase the water tumor. Cystic hydromas also have the property of "invasive" growth along the vascular nerve, but rarely cause compression symptoms.

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