Immunostained CD31 in a cutaneous<unk>  The diagnosis of<unk>  can be difficult due to its asymptomatic nature or non-specific symptoms. Initial diagnosis is typically done by MRI, CT or ultrasound scan, however it is typically difficult to discern if a mass is an<unk>  or other type of tumor such as a melanoma or carcinoma. This means that while the initial diagnosis is typically done via imaging, conclusive diagnosis has to be performed via biopsy and subsequent histological and immunohistochemical analysis. The marker CD31 is often considered the gold standard for<unk>  diagnosis due to its high sensitivity and specificity. Other markers typically used include von Willebrand factor, CD34, and vascular endothelial growth factor. The absence of markers present in melanomas such as S100 and HMB-45 can help in differentiating<unk> s from melanomas.
Angiosarcoma
Hemangiosarcoma
Glomangiosarcoma
Hemangioma
Angiokeratoma
Lymphangiosarcoma
Sarcoma
Lymphangioma