BACKGROUND
Neurothekeoma is a distinctive neoplasm that in the past was often lumped into the broad category of benign peripheral nerve sheath tumors. Atypical cellular neurothekeoma is a rare variant of this neoplasm. This atypical variant is characterized by features that can include the
Nerve sheath myxoma (NSM) is a rare cutaneous neoplasm, the histogenesis of which is controversial. Fifteen cases of NSM were studied by routine light microscopy and with a broad panel of immunohistochemical stains. NSM were classified into three groups based on cellularity, mucin content and growth
Podoplanin, also recognized by the monoclonal antibody D2-40, is a mucin-type transmembrane glycoprotein that is highly expressed in lymphatics and in a range of vascular and nonvascular proliferations. Recently, podoplanin has been detected in fibrous histiocytomas (FHs) and proposed to represent a
We describe the histological and immunohistochemical findings of two cases of cellular neurothekeoma, a recently recognized benign neoplasm considered to be of neural origin. Morphologically they were characterized by a dermal proliferation of plexiform fascicles and small nests of pale
Nerve sheath myxoma is a benign peripheral nerve sheath tumor that rarely occurs in the oral cavity; approximately 12 cases have been reported to date. On histologic evaluation the lesions consist of closely aggregated fascicles that vary considerably in cellularity. Some of the lesions are
Multinodular accumulation of stromal mucin in breast known as nodular mucinosis is an extremely rare condition of breast. Alternatively it is known as myxoma or nerve sheath myxoma of breast. This benign lesion is confined to only nipple and areola region presenting as slow growing, soft and non
OBJECTIVE
Based on a series of 25 cases, we define and characterize combined dermatofibroma, a tumour comprising two or more variant patterns of dermatofibroma in a single lesion.
RESULTS
Dermatofibroma may present with a wide variety of architectural, cellular or stromal peculiarities.
OBJECTIVE
The present series describes six cases of perineurioma, a rare and frequently unrecognized entity, including one case with an unusual plexiform growth pattern.
METHODS
Retrospective clinicopathologic study of six perineuriomas.
RESULTS
All lesions occurred on the upper extremities or
Despite being first described in 1988, superficial angiomyxoma is still a poorly recognized cutaneous tumor. Although its histologic features are distinctive, its existence seems not to be widely accepted. We analyzed the clinicopathologic and immunohistochemical features in a series of 39 cases.
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