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Pseudoglandular schwannoma mimicking renal carcinoma: A case report.
Asian J Surg
December 2023
Department of Rehabilitation, Chongqing Beibei Traditional Chinese Medical Hospital, Chongqing, 400799, China. Electronic address:
A rare case of cutaneous pseudoglandular schwannoma.
J Cutan Pathol
September 2023
Department of Dermatology, Kaiser Permanente Los Angeles Medical Center, Los Angeles, California, USA.
Schwannomas are benign tumors that arise from the peripheral nerve sheath. Many variants of schwannomas exist, including plexiform, epithelioid, cellular, glandular, and ancient. The pseudoglandular subtype is extremely rare, as fewer than five cases of cutaneous pseudoglandular schwannomas have been reported based on our literature review.
View Article and Find Full Text PDFPlexiform Melanocytic Schwannoma: Report of a Second Case and Overview of a Rare Entity.
Am J Dermatopathol
December 2022
Department of Pathology and Laboratory Medicine, Queen Elizabeth II Health Sciences Centre, Nova Scotia Health (Central Zone), Halifax, Nova Scotia, Canada.
The seminal case report of plexiform melanocytic schwannoma, published a decade ago, indicated that this is a rare variant of schwannoma demonstrating immunohistochemical expression of melanocytic markers, electron microscopic evidence of melanosome formation, and genetic features of a benign schwannoma. We report herein, a second example of this entity. Of added interest, our case showed pseudoglandular features, as previously recorded in other variants of schwannoma.
View Article and Find Full Text PDFPseudoendocrine Sarcoma: Clinicopathologic Analysis of 23 Cases of a Distinctive Soft Tissue Neoplasm With Metastatic Potential, Recurrent CTNNB1 Mutations, and a Predilection for Truncal Locations.
Am J Surg Pathol
January 2022
Department of Pathology, Brigham and Women's Hospital, and Harvard Medical School, Boston, MA.
The number of recognized epithelioid soft tissue neoplasms continues to increase and includes epithelioid schwannoma, sclerosing epithelioid fibrosarcoma, and emerging entities such as sarcomas with GLI1 alterations. Here, we describe 23 cases of a previously unrecognized entity, provisionally termed "pseudoendocrine sarcoma." Pseudoendocrine sarcoma is a rare, distinctive tumor of uncertain lineage with a predilection for paravertebral soft tissue in older adults.
View Article and Find Full Text PDFMultiple schwannomas with pseudoglandular element synchronously occurring under the tongue: A case report.
World J Clin Cases
November 2020
Department of Radiology, The First Hospital of Lanzhou University, Lanzhou 730000, Gansu Province, China.
Background: Schwannoma is a rare benign, encapsulated tumor of the nerve sheath under the tongue, mostly occurring as solitary tumors with classical histological pattern and several common morphological variants. To our knowledge, multiple schwannomas with pseudoglandular element synchronously occurring under the tongue are rare; we report herein the first such case.
Case Summary: A 53-year-old man had first noticed an isolated asymptomatic mass under the tongue, and as the mass grew, the tongue was elevated.
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