Eyebrow cyst

Introduction The eyebrow cyst is a type of dermoid cyst. The dermoid cyst is a congenital skin-like neoplasm. Due to abnormal development of the embryonic stage, part of the ectodermal rupture is buried under the skin or conjunctival tissue. It is easy to occur in the inner or outer part of the eyelid, and the site of occurrence is related to the sacral suture, which often originates from this kind of suture. It can also occur in eyebrows, tendons, and conjunctiva. The age of onset is early and more common in infants. The skin lesions are subcutaneous nodules with a diameter of 1 to 4 cm. The skin on the surface can be moved, but the base is often adhered and fixed, and the texture is soft, with fluctuations or dough-like feeling. Generally growth is slow. The most common part is the eye area.

Cause

Due to abnormal development of the embryonic stage, partial rupture of the ectoderm is buried under the skin or under the conjunctival tissue. With the growth and development of these pathological tissues, local blood circulation may be blocked, and some of the visual acuity or local developmental abnormalities such as eyelid dysplasia or retinal appearance may be associated with the appearance of oppression of the eyeball or optic nerve. Some lesions and so on.

an examination

Related inspection

Eye and sacral area CT examination blood routine

Lesion histopathology showed that the cyst was a single room with a thick wall that resembled a intact or incomplete skin structure. The innermost layer is the stratum corneum, and the remaining layers are the granular layer, the spinous cell layer, and the basal layer and the dermis layer. Tissues such as hair follicles, sebaceous glands, small sweat glands, and apocrine sweat glands can be found in the dermis. Sebum, epithelial debris, hair and a more viscous liquid can be seen in the cyst. An ovarian dermoid cyst (cystic teratoma) or an intra-abdominal disseminated dermoid cyst contains a nail, hair, cartilage or bone component. The wall of the capsule contains skin appendage structures such as hair follicles, small sweat glands, apocrine glands, and occasionally teeth or nerves.

Differential diagnosis

Differential diagnosis of eyebrow cyst:

Clinically and epidermoid cysts are not easily distinguishable. However, in the pathological tissue, the two are completely different. The wall of the epidermoid cyst has no skin attachment, and the cystic cavity contains only keratinized substances and fatty substances, and does not contain hair.

The shape is round or oval, and the size is not the same. Generally, the walnut is large and soft, and when the tension of the capsule is large, the hardness is increased like a tumor. There is a connective tissue envelope around the cyst, the surface is smooth, the boundary is clear, slightly elastic, generally does not adhere to the skin, but often adheres to the periosteum, because it is congenital, it is easy to find early. Sometimes there are congenital anomalies such as eyelid defects and deformities.

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