Tumors of neuroectodermal origin

Oct 29, 2019 by in PATHOLOGY & LABORATORY MEDICINE Comments Off on Tumors of neuroectodermal origin

Reactive lesions Traumatic Neuroma Definition • A reactive/reparative process characterized by proliferation of axons, Schwann cells, and perineurial fibroblasts in a disorganized pattern in the background of collagenous stroma (scar)…

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Tumors of vascular origin

Oct 29, 2019 by in PATHOLOGY & LABORATORY MEDICINE Comments Off on Tumors of vascular origin

Benign tumors including reactive vascular proliferations and ectasias Intravascular Papillary Endothelial Hyperplasia (Masson tumor) Definition • A nonneoplastic, reactive, endothelial proliferation representing an organizing thrombus, characterized by formation of arborizing…

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Adipocytic tumors

Oct 29, 2019 by in PATHOLOGY & LABORATORY MEDICINE Comments Off on Adipocytic tumors

Benign tumors and reactive conditions Lipoma Definition • A benign dermal or subcutaneous mesenchymal tumor composed of mature adult-type adipose tissue Clinical features Epidemiology • The most commonly encountered mesenchymal…

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Fibrohistiocytic tumors

Oct 29, 2019 by in PATHOLOGY & LABORATORY MEDICINE Comments Off on Fibrohistiocytic tumors

Benign tumors Fibrous Papule Definition • A benign proliferation in the superficial dermis, composed of fibroblasts, blood vessels, and sparse inflammatory cell infiltrate in the background of a sclerotic dermal…

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Skeletal Muscle Tumors

Oct 29, 2019 by in PATHOLOGY & LABORATORY MEDICINE Comments Off on Skeletal Muscle Tumors

Benign tumors Rhabdomyomatous Mesenchymal Hamartoma Definition • A rare dermal or subcutaneous benign lesion composed of disordered mature elements, including skeletal muscle, adipose tissue, nerve bundles, blood vessels, adnexal tissue,…

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