Plexiform (diffuse) neurofibroma is the most common tumor of the peripheral nerves of the orbit and occurs almost exclusively in combination with Type I neurofibromatosis.
Meningiomas develop from meningoendothelial cells of the arachnoid. Primary meningiomas of the orbit, originating from the optic nerve shell, account for 2% of cases and are less common than gliomas of the optic nerve.
Glioma of the optic nerve is a slowly growing astrocytoma, more often affects girls, less often adults. Usually it is combined with type I neurofibromatosis.
Cancer of the lacrimal gland is a rare high-malignant tumor with poor prognosis. The frequency of occurrence is divided into the following histological types: adenocystic, pleomorphic adenocarcinoma, mucoepidermoid, squamous.
Orbit myositis is an oropathic nonspecific inflammation of one or more extraocular muscles, which is considered to be one of the forms of idiopathic inflammation of the orbit.
Pleomorphic adenoma of the lacrimal gland (benign mixed-cell tumor) is the most common epithelial tumor of the lacrimal gland, which originates from ducts, stroma and musculo-epithelial elements.
Cavernous hemangioma of the eye - the most common benign orbital tumor in adults, is more often found in women (70%). Can be localized anywhere in the orbit, but usually within the muscle funnel, immediately behind the eye.
Neuroblastoma is one of the most common malignant tumors in children. Neuroblastoma originates from primitive neuroblasts of the sympathetic trunk more often in the abdominal region, less often in the chest and small pelvis.
Primary varicose veins consist of weakened segments of the venous system of the orbit of varying length and complexity. Participating in the bloodstream, varicose veins increase with increasing venous pressure.
