Fur sinuses on the back

Introduction There are fur sinus in the lower back. It refers to the occurrence of fur sinus in the lower back caused by various reasons. If there is intracranial inflammation, especially recurrent episodes and sinus in the lower back, the epidermoid cyst, dermoid cyst and deformity should be considered first. Diagnosis of fetal tumors. Epidermoid cysts, also known as cholesteatoma, are also called pearlomas because of their whiteness like white pearls. When the embryonic neural tube is closed, the ectoderm component is mixed, and the growth gradually leads to tumor formation. A dermoid cyst is a congenital disorder and is a type of hamartoma. It is a congenital cyst formed by the primordial surface of the skin cells that is off-site. It is often located under the skin, occasionally under the mucosa or in the body.

Cause

The cause of the fur sinus in the lower back:

Caused by tumors and other reasons. Epidermoid cysts, also known as cholesteatoma, are also called pearlomas because of their whiteness like white pearls. When the embryonic neural tube is closed, the ectoderm component is mixed, and the growth gradually leads to tumor formation. That is, the skin epidermal cell layer remains, and the epithelial tissue constantly renews the keratinized cells, so that the contents of the cyst gradually increase and form a tumor. Epidermoid cysts are benign lesions that can occur in the spine or in the brain.

an examination

Related inspection

CT examination of bone and joint soft tissue

Examination of the fur sinus on the lower back:

Epidermoid cysts, dermoid cysts, and teratomas usually have no specific clinical manifestations if they are small or non-functional. Early symptoms include low back pain, motor sensation of both lower extremities and abnormal reflexes, impotence, and bladder and rectal sphincter dysfunction. Compared with other tumors in the spinal canal, patients with such tumors have the following characteristics except for the younger age of onset and longer course of disease: 1 Because the cyst is mainly located in the lower part of the spinal cord, there are more cones and horsetails, so the waist and leg are painful. More often, often dull pain or severe radiculopathy; 2 more rectal bladder dysfunction, more than 80% of patients have dysuria and dysfunction; 3 motor system damage can be atypical, when the cyst combined with lumbosacral spina bifida When the lower end of the spinal cord is often fixed at a lower part; 4 if the sinus is combined, it can often cause intracranial infection, and there are also a few fur sinus, which are caused by the stimulation of the contents of the capsule.

Differential diagnosis

There are symptoms of identification of the fur sinus on the lower back:

Epidermoid cysts: Epidermoid cysts, also known as cholesteatomas or pearlomas, are cysts formed by ectopic skin cell debris in the skin, so they are also known as epithelial cysts. Often due to skin trauma, sometimes the onset and trauma interval is many years or the injury is mild and difficult to recall. It is more common in workers who are engaged in manual operations, so the fingertips and palms are more common. In addition, the toe and ankle are also good sites, occasionally seen in the forehead and the top of the head, a single atrial subcutaneous cyst with only one cyst, which is round or oval, with a smooth surface and a tough and tense touch. No adhesion to the surface skin, the substrate is mobile or non-moving. The inner wall of the epidermoid cyst is a stratified squamous epithelial structure of the epidermis of the skin. If the cyst persists for a long time, the structure of each layer of skin may be weak or incomplete. There is no dermal tissue on the inner wall, and the outer wall of the cyst is composed of fibrous tissue. The contents of the capsule are gray-white cheese-like stratified keratinized material mixed with detached broken epidermal cells.

Epidermoid cysts that occur in the brain are caused by abnormal ectodermal cell migration during neural tube closure, accounting for 1% of primary intracranial tumors, occurring in young adults, with cerebral cerebral cerebral horns being the most common, followed by saddles. Pools, quadrants, intracranial fossa, and ventricular systems can also occur within the skull barrier. The epidermoid cyst is thin and is formed by a layer of epidermal tissue. The capsule consists of epithelial debris, keratin and cholesterol.

Dermoid cyst: a congenital skin-like neoplasm. Due to abnormal development of the embryonic stage, partial rupture of the ectoderm 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 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.

Histologically, a typical cyst is covered with a layer of connective tissue capsule, and the epidermal tissue faces the cystic cavity. The skin between them contains hypoplastic cutaneous appendages such as hair follicles, fascia, sebaceous glands, blood vessels, etc., sometimes mixed with cartilage, muscle, nerve. There are sebaceous adenoids, keratinized substances, cholesterol, hair, necrotic cells, etc. in the cyst, which may have calcification. 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.

Teratoma: Teratoma originates from potentially versatile primitive blasts, mostly benign, but the malignant tendency increases with age. The site of occurrence is related to the midline front or midline of the embryonic body cavity, which is more common in the appendix, mediastinum, retroperitoneum, and gonads. Occurs in newborns and babies, and more women. Epidermoid cysts, dermoid cysts, and teratomas usually have no specific clinical manifestations if they are small or non-functional. Early symptoms include low back pain, motor sensation of both lower extremities and abnormal reflexes, impotence, and bladder and rectal sphincter dysfunction. Compared with other tumors in the spinal canal, patients with such tumors have the following characteristics except for the younger age of onset and longer course of disease: 1 Because the cyst is mainly located in the lower part of the spinal cord, there are more cones and horsetails, so the waist and leg are painful. More often, often dull pain or severe radiculopathy; 2 more rectal bladder dysfunction, more than 80% of patients have dysuria and dysfunction; 3 motor system damage can be atypical, when the cyst combined with lumbosacral spina bifida When the lower end of the spinal cord is often fixed at a lower part; 4 if the sinus is combined, it can often cause intracranial infection, and there are also a few fur sinus, which are caused by the stimulation of the contents of the capsule.

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