• Along with neurofibroma, schwannoma constitutes one of the two most common benign peripheral nerve sheath tumors. (medscape.com)
  • [ 12 ] There have also been reports of nerve sheath tumors exhibiting histologic hybrid features of schwannoma and soft-tissue perineurioma. (medscape.com)
  • Of note, the benign nerve sheath tumors are classified as World Health Organization (WHO) grade I on the basis of their benign cytologic features, in contrast to the malignant counterparts, which are WHO grade III or IV. (medscape.com)
  • A neurilemmoma is a benign, usually encapsulated neoplasm derived from Schwann cells and, along with neurofibroma, constitutes one of the 2 most common benign peripheral nerve sheath tumors. (medscape.com)
  • adenomatoid t. a small benign t. of the male epididymis and female genital tract , consisting of fibrous tissue or smooth muscle enclosing anastomosing glandlike spaces containing acid mucopolysaccharide lined by flattened cells that have ultra-structural characteristics of mesothelial cells. (en-academic.com)
  • benign t. a t. that does not form metastases and does not invade and destroy adjacent normal tissue . (en-academic.com)
  • The dermis is the layer of skin between the epidermis and subcutaneous tissue, and comprises two sections, the papillary dermis and the reticular dermis. (wikipedia.org)
  • Blau syndrome Chronic infantile neurologic cutaneous and articular syndrome Familial cold urticaria (familial cold autoinflammatory syndrome) Familial Mediterranean fever Hyper-IgD syndrome Majeed syndrome Muckle-Wells syndrome TNF receptor associated periodic syndrome (familial Hibernian fever, TRAPS, tumor necrosis factor receptor associated periodic syndrome) Chronic blistering cutaneous conditions have a prolonged course and present with vesicles and bullae. (wikipedia.org)
  • Patients with Beckwith-Wiedemann syndrome and Denys-Drash syndrome have an increased risk of developing Wilms tumor ( 5 , 6 ). (abdominalkey.com)
  • Wiedemann-Beckwith syndrome is related to abnormalities on chromosome 11p15 and characterized by multiple craniofacial anomalies, abdominal wall defects, and tumors of the genitourinary tract, liver, adrenal gland, and central nervous system among other abnormalities. (abdominalkey.com)
  • The first section will cover those tumors that characteristically are associated with the pediatric population. (abdominalkey.com)
  • Specific discussions of etiology and pathogenesis are dealt with in each of the sections on individual tumors, rather than as a freestanding section, as is used elsewhere in this text. (abdominalkey.com)
  • The main cellular component of this tissue is the adipocyte, or fat cell. (wikipedia.org)
  • The classification of epithelial tumors of the kidney has in particular undergone substantial progress in the last two decades with major contributions from genetic typing of renal cell carcinomas (RCCs). (abdominalkey.com)
  • The role of genotyping and ancillary tools, in particular immunohistochemistry, in correctly classifying these tumors is highlighted in the section on Renal Cell Carcinoma. (abdominalkey.com)
  • A diverse array of tumors can arise in the human kidney. (abdominalkey.com)
  • The purpose of this chapter is to familiarize the reader with the tumor types encountered in the human rather than to provide a comprehensive diagnostic reference, which is better handled in more comprehensive textbooks and monographs. (abdominalkey.com)
  • The subcutaneous tissue is a layer of fat between the dermis and underlying fascia. (wikipedia.org)
  • This tissue may be further divided into two components, the actual fatty layer, or panniculus adiposus, and a deeper vestigial layer of muscle, the panniculus carnosus. (wikipedia.org)
  • In a fully developed nerve, a layer of connective tissue, or epineurium, surrounds the entire nerve trunk. (medscape.com)
  • In the embryo, the epidermis, hair, and glands form from the ectoderm, which is chemically influenced by the underlying mesoderm that forms the dermis and subcutaneous tissues. (wikipedia.org)
  • The peripheral nervous system can be defined as nervous tissue outside the brain and spinal cord. (medscape.com)
  • The cut surface is typically solid, soft, and gray or pink, with a texture and appearance resembling brain tissue. (abdominalkey.com)
  • Wilms tumor is believed to arise from embryonic tissues called nephrogenic rests that fail to undergo normal involution ( 7 ). (abdominalkey.com)
  • The skin weighs an average of four kilograms, covers an area of two square metres, and is made of three distinct layers: the epidermis, dermis, and subcutaneous tissue. (wikipedia.org)
  • The presence of a noninvasive tumor next to a peripheral nerve suggests the diagnosis of neurilemmoma. (medscape.com)
  • Along with neurofibroma, schwannoma constitutes one of the two most common benign peripheral nerve sheath tumors. (medscape.com)
  • Astrocytomas are the most common type of primary brain tumour within the group known as gliomas. (thebraintumourcharity.org)
  • They are the third most common childhood brain tumour. (thebraintumourcharity.org)
  • This is common with advancing age, vigorous tooth brushing, diseases, or tissue loss of the gingiva, the PERIODONTAL LIGAMENT and the supporting bone (ALVEOLAR PROCESS). (lookformedical.com)
  • 12] There have also been reports of nerve sheath tumors exhibiting histologic hybrid features of schwannoma and soft-tissue perineurioma. (medscape.com)
  • Of note, the benign nerve sheath tumors are classified as World Health Organization (WHO) grade I on the basis of their benign cytologic features, in contrast to the malignant counterparts, which are WHO grade III or IV. (medscape.com)
  • For the first time, the WHO's classification defines tumours by their molecular features, not just what the tumour looks like under a microscope (histology). (thebraintumourcharity.org)
  • The presence or absence of certain molecules or gene changes (biomarkers) can give your health team more information about your tumour, how it's likely to respond to a treatment and how it's likely to progress. (thebraintumourcharity.org)