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Há 5 dias · Juvenile xanthogranuloma is a benign, reactive, self-limiting disorder within the non-Langerhans cell histiocytosis group. It primarily affects infants and preschoolers, and occasionally in adults. Some cases report concurrent non-LCH and leukemia, with bone marrow being the second common pathology.
Há 3 dias · The histological appearances may create a differential diagnosis of Langerhans cell histiocytosis, adult/juvenile xanthogranuloma or Hodgkin's disease. Immunohistochemistry plays an important role, with CRDD histiocytes characteristically having positivity for both S100 and CD68 and negativity for CD1a and Langerin.
Há 1 dia · For adolescent males the most common tumors involving the infratemporal fossa would be a juvenile nasal angiofibroma; however other pediatric ITF tumors include primary yolk sac tumors, xanthogranuloma, lipoblastoma, Burkitt lymphoma, and teratomas 3,4-6.
Há 3 dias · Pathology. Malignant peripheral nerve sheath tumors can arise in a number of different situations 8-10: de novo. de-differentiation. more often in plexiform neurofibromas than in cutaneous neurofibromas in NF1. rarely other neurogenic tumors (e.g schwannoma, ganglioneuroblastoma, ganglioneuroma, pheochromocytoma, perineurioma) 8 ...
Há 4 dias · Pathology. The vast majority (>90%) of primary CNS lymphomas are B-cell in origin: diffuse large B-cell lymphoma and high-grade Burkitt-like B-cell lymphoma 1. Malignant cells tend to accumulate around and within blood vessels. Low-grade tumors are more frequently T-cell in origin 1. Effects of steroids
Há 3 dias · Definition / general. Alopecia mucinosa is an inflammatory hair loss condition, characterized by mucin within the pilosebaceous unit (hair follicles and sebaceous glands, i.e., pilosebaceous units) This inflammatory disorder may lead to subsequent follicular degeneration and may occur secondary to other diseases (e.g., lymphoma)
Há 4 dias · Glioblastomas, now defined as IDH-wildtype tumors, are essentially tumors of adults, usually occurring after the age of 40 years with a peak incidence between 65 and 75 years of age. There is a slight male preponderance with a 3:2 M:F ratio 5 .
