Orbital parasitic cyst
Introduction
Introduction to orbital parasitic cysts Parasitic cysts (parasitic cysts) can occur in the eyelids. The most common parasite in cystic inflammatory lesions is T. echinococcus. The larvae of this aphid are called Echinococcus granulosus, which produces lesions. Known as the echinococcosis (echinococcal) cyst, it can be transmitted through the bloodstream and lymphatics and spread to various organs of the body, including the eyelids. basic knowledge The proportion of illness: 0.0021% Susceptible people: no special people Mode of infection: non-infectious Complications: eye movement disorders
Cause
Causes of orbital parasitic cysts
(1) Causes of the disease
It is often caused by larvae of aphids, echinococcosis, swine mites and polychaetes, and the clinical characteristics of each group of these parasitic cysts are very similar.
(two) pathogenesis
The life links and infection pathways of aphids are as follows: the primary host is often a dog with aphid cases, and its excretion often contains ascaris eggs, grazing animals such as sheep, goats, pigs, cattle, and rabbits are swallowed by feces (with ascaris eggs). Contaminated plants, these animals, especially pigs, can become intermediate hosts. When people eat intermediate hosts, especially uncooked pork, the human body begins to have insect parasites. In addition, people can also swallow food contaminated with animal waste. Or directly licking the dog, once the larva enters the human small intestine, it is transferred to the bloodstream and lymph and spread to various organs of the body, including the eyelids.
Prevention
Prevention of orbital parasite cysts
Special attention should be paid to food safety.
Complication
Eyelid parasite cyst complications Complications, eye movement disorders
Severe cases can cause eye movement disorders and even retinal and optic neuropathy.
Symptom
Symptoms of orbital parasitic cysts Common symptoms Eyeball retinal edema congestion optic atrophy
Patients generally showed progressive unilateral painless ocular protrusion and orbital edema. The cyst in the anterior sacral sacral sacral sac and soft mass. In more severe cases, there may be optic disc edema, retinal vein congestion, and decreased vision. Even optic atrophy, although cysts are often separate, individual patients have multiple compartments of cysts in the unilateral orbit, and subarachnoid and vitreous larvae are more common than invasive eyelids.
Examine
Examination of orbital parasitic cysts
1. Blood routine: including eosinophilic examination, indirect coagulation test and Carsonone test, it has a suggestive value for disease diagnosis.
2. Pathological examination: The cystic echinococcosis cyst shows a thick fibrous wall, the outer side is composed of a non-cellular material called the outer sac, and the inner layer contains a larva called the inner sac. The substance in the cyst can contain many larvae's heads. Section.
CT scan of the eyelid: it is helpful for the diagnosis of orbital parasitic cysts. It shows that a cystic mass with a clear boundary has a density similar to that of water or cerebrospinal fluid. The common manifestation is the displacement of the medial wall caused by cystic lesions. B-mode ultrasound showed cystic lesions above the orbit.
Diagnosis
Diagnosis and diagnosis of orbital parasitic cysts
The patient has a history of life in the parasitic endemic area, has eaten uncooked pork or has close contact with the dog, and has clinically the above-mentioned performance should consider this diagnosis, but the systemic examination of patients with eyelid involvement does not necessarily have a diagnosis. Help, the liver and brain are often the location of systemic involvement, but in most cases, E. sinensis (echinococcosis) has not been shown to have evidence of involvement of these organs, and imaging can be used to confirm the diagnosis.
The identification of eyelid abscess mainly depends on the results of imaging examination.
