choroidal depression
Introduction
Introduction Choroidal melanoma is the most common intraocular malignant tumor in adults. It is more common in 50-60 years old. The age of onset of this patient is small. Because the tumor first occurs in the peripheral part, the effect on vision is small, and the complications will appear. At the time of the progressive decline in vision, attention is paid. Typical ultrasound findings are solid hemispherical or mushroom-shaped masses protruding from the wall of the bulb to the vitreous cavity. There may be "knockout signs" and/or "choroidal depression signs", and there are many blood flow signals inside the mass.
Cause
Cause
Choroidal melanoma. The pulse black is located in the peripheral part of the fundus. There are often no symptoms in the early stage. For example, in the posterior pole, the patient often complains of vision loss, visual field defect, visual distortion, eye shadow, color vision change, and persistent hyperopic diopter increase. When the tumor is enlarged and secondary retinal detachment occurs, the severe visual acuity decreases.
Examine
an examination
Related inspection
Eyeball foreign body positioning photographic eye and sacral area CT examination
According to the hemispherical protrusion of the mass from the wall of the ball to the vitreous and "choroidal depression", combined with clinical history and other auxiliary examinations can make a diagnosis. Color Doppler ultrasound provides important information for the diagnosis of choroidal melanoma. Combined with other imaging studies, it can make a correct diagnosis or valuable suggestive diagnosis of choroidal melanoma.
Diagnosis
Differential diagnosis
In the fundus fluorescein examination, choroidal melanoma can affect its fluorescence intensity due to the size of the tumor, the number of pigments and blood vessels, the degree of leakage, and the presence or absence of tumor necrosis and retinal destruction. Shows weak fluorescence, and vice versa shows strong fluorescence. When the refractive interstitial is unclear, imaging examination is essential if choroidal or ciliary body melanoma is suspected clinically. The most valuable are ocular ultrasound and magnetic resonance imaging. In particular, the diagnosis of the eye, its differential diagnosis, differential diagnosis, biometric measurement of the tumor, selection of treatment, and observation of the efficacy of the prognosis are all irreplaceable by other detection methods. Furthermore, combined with standardized A-mode ultrasound to detect the special manifestations of choroidal melanoma, namely (1) physicality; (2) sudden rise of the surface wave of the tumor; (3) low internal reflection; (4) rapid spontaneous movement of the pathological wave, The ultrasound attenuation of choroidal melanoma is significant, while other intraocular tumors lack this ultrasound feature, which is helpful for the ultrasound diagnosis of choroidal melanoma.
Therefore, in clinical practice, fluorescein fundus angiography and ophthalmologic B-ultrasound examination should be combined with each other to provide strong evidence for the diagnosis and differential diagnosis of choroidal metastatic tumors. In order to improve the diagnostic criteria, it is necessary to combine medical history, general examination and Other eye-assisted examinations, FFA and B-ultrasound can clearly show the location of the lesion and the development process, which can be used to guide clinical treatment.
According to the hemispherical protrusion of the mass from the wall of the ball to the vitreous and "choroidal depression", combined with clinical history and other auxiliary examinations can make a diagnosis. Color Doppler ultrasound provides important information for the diagnosis of choroidal melanoma. Combined with other imaging studies, it can make a correct diagnosis or valuable suggestive diagnosis of choroidal melanoma.
