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[2]: 599 These tumors were reclassified by Dr. Weiss in 1996 as "spindle cell hemangioma", rather than hemangioendothelioma, due to the excellent prognosis observed in a group of 78 patients. [ 5 ] Retiform hemangioendothelioma (also known as a "Hobnail hemangioendothelioma" [ 3 ] ) is a low-grade angiosarcoma , first described in 1994 ...
Hemangiopericytomas are tumors that are derived from specialized spindle shaped cells called pericytes, which line capillaries. [4] Hemangiopericytoma is an aggressive mesenchymally derived tumor with oval nuclei with scant cytoplasm. There is dense intercellular reticulin staining. Tumor cells can be fibroblastic, myxoid, or pericytic. These ...
A hemangioma or haemangioma is a usually benign vascular tumor derived from blood vessel cell types. The most common form, seen in infants, is an infantile hemangioma , known colloquially as a "strawberry mark", most commonly presenting on the skin at birth or in the first weeks of life.
A vascular tumor is a vascular anomaly where a tumor forms from cells that make blood or lymph vessels; a soft tissue growth that can be either benign or malignant. [1] Examples of vascular tumors include hemangiomas, hemangioendotheliomas, Kaposi's sarcomas, angiosarcomas, and hemangioblastomas. An angioma refers to any type of benign vascular ...
This hotspot mutation is presumed to be responsible for the spindle cell hemangiomas and enchondromas in cases of Maffucci syndrome. Sanger sequencing analysis concluded that exon 4 is the primary location of mutations in IDH1 and IDH2 genes are specifically responsible for hemangiomas.
Pigmented spindle cell nevus (pigmented spindle cell tumor of Reed, pigmented variant of Spitz nevus) Pseudomelanoma (recurrent melanocytic nevus, recurrent nevus) PUVA lentigines; Small-sized congenital nevocytic nevus; Spitz nevus (benign juvenile melanoma, epithelioid and spindle cell nevus, Spitz's juvenile melanoma)
Spindled and stellate cells with an ill-defined cytoplasm; Cells loosely scattered in a myxoid stroma; No evidence of nuclear atypia and mitosis; Numerous, thin-to-thick wall vessels of different sizes; Myxoid, hypocellular background; Bland cytological appearance of spindle cells
Angiolymphoid hyperplasia with eosinophilia (also known as: [1] "Epithelioid hemangioma," "Histiocytoid hemangioma," "Inflammatory angiomatous nodule," "Intravenous atypical vascular proliferation," "Papular angioplasia," "Inflammatory arteriovenous hemangioma," and "Pseudopyogenic granuloma") usually presents with pink to red-brown, dome-shaped, dermal papules or nodules of the head or neck ...