Dermoid cyst It occurs with violations of embryogenesis and contains elements of ectoderm. A round-shaped formation of various sizes, with clear boundaries, soft elastic consistency. Content – fat or jelly-like masses with an unpleasant odor, often containing hair. It is localized in various parts of the…
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Chemodectoma of the head and neck occupies a special place in the group of paraganglionic neoplasms. Allocate chemodectoma somnolence (carotid) glomus , chemodectoma vagus nerve and atypical chemodectoma. Chemodectomas are more often observed in women aged 20-50 years, a familial predisposition to the development of a chemodectomy , especially carotid localization , is known . The tumor has…
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Neurinoma of the head and neck ( schwannoma or neurolemma ) originates from the Schwann sheath of nerves. Macroscopically , it is a single, encapsulated, rounded tumor. In large neuromas, a mottled picture occurs due to hemorrhages, brown sections of xanthomatosis and cystic cavities. Neuromas located at the neck do not reach such…
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Synovial sarcoma of the head and neck is a solitary tumor, falsely encapsulated. On the neck it is often localized in the upper third, on its lateral surface, it is determined under the sternocleidomastoid muscle. Microscopically – reflects the features of the synovial membrane. The most characteristic…
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Meningioma of the head and neck (extracranial) is localized in the maxillary fossa (in the posterolateral parapharyngeal space) in the form of a densely elastic node and has pharyngeal and neurological symptoms. Microscopically, it has the structure of psammomatous meningioma , is represented by many psammological bodies located at different distances from each…
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Rhabdomyosarcoma of the head and neck is a dense, encapsulated, grayish-pink malignant tumor in the section. It is localized more often in the sternocleidomastoid muscle, on the back of the neck and in the supraclavicular region. Clinically, the tumor has a progressive growth rate…
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Phlegmon of the eyelid ( phlegmone palpebrae ) – diffuse inflammation of the tissues of the eyelid; often develops as a complication of barley. Phlegmon of the upper eyelid In some cases, phlegmon occurs in places where there is a violation of the integrity of…
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The biomechanics of contusion injuries of the eyeball is quite complicated. Under the influence of external force (inflicted blow), the eyeball, despite the fact that its contents are resistant to compression, is deformed. At the same time, intraocular pressure rises, reaching very…
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Anterior chamber hemorrhage (hyphema) is a common clinical symptom found in most patients with blunt eye trauma. The source of hyphema is damage to the vessels of the iris and ciliary body.Hyphema can be of varying intensity, from small to total,…
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The most common type of damage to the choroid is its ruptures, which are always accompanied by hemorrhages. As a rule, the detection of a rupture is preceded by the detection of a hemorrhage in the choroid, since only after the…
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