2022年1月4日 · Malignant melanotic nerve sheath tumor (formerly called melanotic schwannoma) is a rare tumor with metastatic potential, which often arises in the paraspinal region. Given its different biological behavior, it should not be labeled as schwannoma. Most schwannomas are encapsulated and easily separated from their nerve of origin.

2019年8月1日 · For this purpose, MPM is applied to microscopically study schwannoma. By analyzing the intrinsic optical signature of schwannoma, several histological features significant for the diagnosis of schwannoma, including the Antoni A region, Antoni B region, vascular wall transparent degeneration and collagen deposition, could be recognized.

2024年5月20日 · There are several methods used to diagnose cutaneous schwannoma clinically, and they include ultrasonography, biopsy for histological examination, immunochemistry, in addition to ultrastructural studies with electron microscopy …

Electron microscopy of the sarcomatous component revealed features consistent with Schwann cell origin. Ultrastructure of the glands revealed a well- differentiated epithelium with basement membrane, desmosomes and the presence of microvilli with core rootlets, glycocalyx, and intracytoplasmic R-bodies.

1981年9月15日 · Fifteen malignant schwannomas were examined by light and electron microscopy. Five tumors arose in patients with neurofibromatosis and five were contiguous with a peripheral nerve (Group I). Five tumors met neither of these generally accepted diagnostic criteria but were light microscopically seen a …

2015年1月8日 · Schwannomas demonstrated cohesive tissue fragments with fibrillary and occasionally fibrous stroma. The presence of intranuclear inclusions and marked nuclear pleomorphism and the absence of single cells with bipolar cytoplasmic processes emerged as statistically significant differences between the schwannoma and the nonschwannoma groups.

2019年8月1日 · Schwannoma is a kind of slow-growing and rare neoplasm which poses diagnostic challenges owing to its clinical silence at the presentation period. Here, a schwannoma tumor was studied by multiphoton microscopy (MPM). Results indicate that MPM is capable of identifying a schwannoma tumor without the need for labels.

1983年4月15日 · The diagnosis of malignant schwannoma may be difficult or impossible by light microscopy alone, if the neoplasm is poorly differentiated and if there is no clinical evidence for its arising from a nerve-trunk. Six cases of malignant schwannoma in which electron microscopy confirmed or established th …

1978年12月1日 · A case of malignant schwannoma of the vulva arising in a 44-year-old black female was studied utilizing light and transmission electron microscopy. Histological examination revealed areas consistent with Antoni type A and B tissues, which …

1984年2月1日 · Electron microscopy of the sarcomatous component revealed features consistent with Schwann cell origin. Ultrastructure of the glands revealed a well-differentiated epithelium with basement membrane, desmosomes and the presence of microvilli with core rootlets, glycocalyx, and intracytoplasmic R-bodies.