| neurofibroma, plexiform | A type of neurofibroma representing an anomaly rather than a true neoplasm, in which the proliferation of schwann cells occurs from the inner aspect of the nerve sheath, thereby resulting in an irregularly thickened, distorted, tortuous structure. In some instances the process extends along the course of the nerve and may eventually involve the spinal roots and the spinal cord. (12 Dec 1998) |
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| storiform neurofibroma | An uncommon variant of dermatofibrosarcoma protuberans containing heavily pigmented dendritic melanocytes scattered between spindle cells of the tumour. Synonym: Bednar tumour, storiform neurofibroma. (05 Mar 2000) |
| neurofibroma | <oncology, tumour> A neurofibroma is a smooth, polypoid, soft or firm tumour that arises from the Schwann cells and fibroblasts of the neurilemmal sheath. They may grow anywhere in the myelinated nervous system. (27 Sep 1997) |
| plexiform | Weblike, or resembling or forming a plexus. Origin: plexus + L. Forma, form (05 Mar 2000) |
| plexiform layer | molecular layer |
| plexiform layer of cerebral cortex | Layer 1 of the cortex cerebri. Synonym: plexiform layer of cerebral cortex. (05 Mar 2000) |
| plexiform layers of retina | Layer's of the retina where synapses occur; in the external layer, processes of rods and cones synapse with bipolar neuron dendrites; in the internal layer, axon terminals of bipolar cells synapse with ganglion cell dendrites. See: retina. Synonym: stratum plexiforme externum et internum retinae. (05 Mar 2000) |
| plexiform neuroma | plexiform neurofibroma |