Biomaterial Database

[Electron microscopic observation on benign tumors of the facial nerve]. 1992

Y Y Fang

PLA General Hospital, Beijing.

Two cases of benign tumors of the facial nerve were examined. One was neurilemmoma and the other neurofibroma. The histopathological diagnoses of the tumors are difficult to make with light microscope. However, electron microscopy may be helpful. Under transmission electron microscope, the difference of two kinds of tumors is obvious. The main pathological features had been discussed.

UI	MeSH Term	Description	Entries
D008854	Microscopy, Electron	Microscopy using an electron beam, instead of light, to visualize the sample, thereby allowing much greater magnification. The interactions of ELECTRONS with specimens are used to provide information about the fine structure of that specimen. In TRANSMISSION ELECTRON MICROSCOPY the reactions of the electrons that are transmitted through the specimen are imaged. In SCANNING ELECTRON MICROSCOPY an electron beam falls at a non-normal angle on the specimen and the image is derived from the reactions occurring above the plane of the specimen.	Electron Microscopy
D009442	Neurilemmoma	A neoplasm that arises from SCHWANN CELLS of the cranial, peripheral, and autonomic nerves. Clinically, these tumors may present as a cranial neuropathy, abdominal or soft tissue mass, intracranial lesion, or with spinal cord compression. Histologically, these tumors are encapsulated, highly vascular, and composed of a homogenous pattern of biphasic fusiform-shaped cells that may have a palisaded appearance. (From DeVita Jr et al., Cancer: Principles and Practice of Oncology, 5th ed, pp964-5)	Neurinoma,Schwannoma,Schwannomatosis, Plexiform,Neurilemoma,Neurilemmomas,Neurilemomas,Neurinomas,Plexiform Schwannomatoses,Plexiform Schwannomatosis,Schwannomas
D009455	Neurofibroma	A moderately firm, benign, encapsulated tumor resulting from proliferation of SCHWANN CELLS and FIBROBLASTS that includes portions of nerve fibers. The tumors usually develop along peripheral or cranial nerves and are a central feature of NEUROFIBROMATOSIS 1, where they may occur intracranially or involve spinal roots. Pathologic features include fusiform enlargement of the involved nerve. Microscopic examination reveals a disorganized and loose cellular pattern with elongated nuclei intermixed with fibrous strands. (From Adams et al., Principles of Neurology, 6th ed, p1016)	Neurofibromas
D003390	Cranial Nerve Neoplasms	Benign and malignant neoplasms that arise from one or more of the twelve cranial nerves.	Cranial Neuroma, Benign,Benign Cranial Nerve Neoplasms,Benign Cranial Nerve Tumors,Cranial Nerve Neoplasms, Benign,Cranial Nerve Neoplasms, Malignant,Cranial Nerve Tumors, Benign,Cranial Nerve Tumors, Malignant,Malignant Cranial Nerve Neoplasms,Malignant Cranial Nerve Tumors,Neoplasms, Cranial Nerve,Neoplasms, Cranial Nerve, Benign,Neoplasms, Cranial Nerve, Malignant,Tumors, Cranial Nerve, Benign,Tumors, Cranial Nerve, Malignant,Benign Cranial Neuroma,Benign Cranial Neuromas,Cranial Nerve Neoplasm,Cranial Neuromas, Benign,Neoplasm, Cranial Nerve,Neuroma, Benign Cranial,Neuromas, Benign Cranial
D005154	Facial Nerve	The 7th cranial nerve. The facial nerve has two parts, the larger motor root which may be called the facial nerve proper, and the smaller intermediate or sensory root. Together they provide efferent innervation to the muscles of facial expression and to the lacrimal and SALIVARY GLANDS, and convey afferent information for TASTE from the anterior two-thirds of the TONGUE and for TOUCH from the EXTERNAL EAR.	Cranial Nerve VII,Marginal Mandibular Branch,Marginal Mandibular Nerve,Seventh Cranial Nerve,Nerve VII,Nerve of Wrisberg,Nervus Facialis,Nervus Intermedius,Nervus Intermedius of Wrisberg,Cranial Nerve VIIs,Cranial Nerve, Seventh,Facial Nerves,Mandibular Nerve, Marginal,Mandibular Nerves, Marginal,Marginal Mandibular Nerves,Nerve VIIs,Nerve, Facial,Nerve, Marginal Mandibular,Nerve, Seventh Cranial,Nerves, Marginal Mandibular,Nervus Faciali,Seventh Cranial Nerves,Wrisberg Nerve,Wrisberg Nervus Intermedius
D005155	Facial Nerve Diseases	Diseases of the facial nerve or nuclei. Pontine disorders may affect the facial nuclei or nerve fascicle. The nerve may be involved intracranially, along its course through the petrous portion of the temporal bone, or along its extracranial course. Clinical manifestations include facial muscle weakness, loss of taste from the anterior tongue, hyperacusis, and decreased lacrimation.	Acquired Facial Neuropathy,Cranial Nerve VII Diseases,Facial Myokymia,Facial Neuropathy,Geniculate Ganglionitis,Cranial Nerve VII Disorders,Facial Nerve Disorders,Facial Nerve Motor Disorders,Facial Nerve Sensory Disorders,Facial Neuritis,Familial Facial Neuropathy,Motor Disorders, Facial Nerve,Sensory Disorders, Facial Nerve,Seventh Cranial Nerve Diseases,Acquired Facial Neuropathies,Disease, Facial Nerve,Diseases, Facial Nerve,Disorder, Facial Nerve,Disorders, Facial Nerve,Facial Myokymias,Facial Nerve Disease,Facial Nerve Disorder,Facial Neuritides,Facial Neuropathies,Facial Neuropathies, Acquired,Facial Neuropathies, Familial,Facial Neuropathy, Acquired,Facial Neuropathy, Familial,Familial Facial Neuropathies,Ganglionitides, Geniculate,Ganglionitis, Geniculate,Geniculate Ganglionitides,Myokymia, Facial,Myokymias, Facial,Neuritides, Facial,Neuritis, Facial,Neuropathies, Facial,Neuropathies, Familial Facial,Neuropathy, Facial,Neuropathy, Familial Facial
D005260	Female		Females
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328	Adult	A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available.	Adults