The classification of<unk>  is based on both its origin and the underlying risk factors that may have contributed. This is not a comprehensive list and case reports often go into further depth. Primary cutaneous<unk> <unk>  in the skin (usually the head or neck and specifically the scalp) with no underlying risk factors such as lymphedema or radiation therapy. Lymphedema associated<unk>  Also called Stewart-Treves syndrome, it is a lymphangiosarcoma resulting from chronic lymphedema, swelling due to the build up of lymphatic fluid. It typically happens in the breast following a mastectomy that removes the lymph nodes of the breast. However it can happen anywhere. Parenchymal<unk> <unk>  in parenchymal organs such as the liver, breast or heart. These makes up about 40% of<unk> . Primary breast<unk>  This refers to<unk>  of the breast without underlying causes such as radiation therapy or lymphedema. It is rare and makes up only 0.04% of breast tumors and 8% of breast sarcomas. It is very aggressive, usually presents in younger females and is often noticeable by a palpable mass. Prognosis is poor with a five-year survival between 8 and 50%. Secondary breast<unk>  These are<unk>  that arise in the breast from underlying causes such as lymphedema or radiation, usually from radiation therapy for breast cancer. The link between radiation therapy and<unk>  has been disputed by some who profess the<unk>  is caused by concurrent lymphedema. Secondary breast<unk>  tends to have a bad prognosis. Radiation-associated<unk>  has a five-year survival of 10 to 54%. Distant metastases are present in 27–42% of individuals and is associated with a far worse prognosis. Other prognostic factors include size of tumor, age and how much can be removed by surgery. Primary brain<unk>  Primary brain<unk>  are<unk>  that arise in the brain (i.e. not metastasised from elsewhere). They are exceedingly rare with only a few cases reported. Imaging is non specific and differential diagnosis includes most other brain tumors such as gliomas or cavernomas, requiring biopsy to confirm diagnosis, usually after surgery. Prognosis is generally poor with a median survival rate of eight months. However it varies greatly depending on whether or not the tumor has metastasised, some individuals may be rid of the disease following surgery, chemotherapy and radiation therapy. Primary cardiac<unk>  Primary cardiac<unk>  is an<unk>  that arises in the heart. Despite being very rare they are the most common malignant primary heart tumor with 10–25% of cases being<unk> s. Symptoms may include shortness of breath, chest pain (46%), hypotension and syncope. Superior vena cava syndrome is reportedly a complication of cardiac<unk> . Due to the non-specificity of symptoms and rarity of the disease it is often missed by doctors and initial diagnosis may be delayed. A 2012 study reported that 56% of patients presented with pericardial effusion with or without cardiac tamponade. The most common finding on imaging is cardiomegaly. Prognosis is generally very poor with a mean survival rate of three months to four years following diagnosis. Metastasis at time of diagnosis is common. Primary liver<unk>  Primary<unk>  of the liver is the third most common type of liver cancer however it only makes up 0.1–2.0% of all liver cancers. It is rapidly fatal with most individuals dying within six months or a year even with surgical resection. Despite being associated with arsenic, vinyl chloride, thorotrast and other chemicals, 75% of liver<unk> s have no known cause. Men are more commonly affected in a ratio of 3–4:1 however in children girls are more often affected. If symptomatic it often presents with non-specific liver related symptoms such as abdominal pain, jaundice, fatigue, unintended weight loss and distension. Deep soft tissue<unk> <unk>  in the deep soft tissue such as adipose tissue, ligaments or muscles. These make up about 10% of<unk> .
Angiosarcoma
Hemangiosarcoma
Glomangiosarcoma
Hemangioma
Angiokeratoma
Lymphangiosarcoma
Sarcoma
Lymphangioma