Sorafenib in Treating Patients With Angiosarcoma That is Locally Advanced, Metastatic, or Unable to Be Removed by Surgery

DISEASE CHARACTERISTICS: * Histologically confirmed angiosarcoma * Locally advanced or metastatic disease * Unresectable disease * No Kaposi sarcoma, hemangiopericytoma, or hemangioendothelioma * Measurable tumor with at least 1 measurable lesion by RECIST criteria * Tumor in a previously irradiated area must not show progression * No brain metastases or meningeal tumors (symptomatic or asymptomatic) PATIENT CHARACTERISTICS: * WHO performance status 0-2 * Life expectancy ≥ 3 months * WBC ≥ 3,000/mm³ * ANC ≥ 1,500/mm³ * Platelet count ≥ 100,000/mm³ * Hemoglobin ≥ 9 g/dL * PT or INR and aPTT ≤ 1.5 times upper limit of normal (ULN) * Anticoagulation treatment with heparin or vitamin K allowed if the above criteria are met * Liver transaminases ≤ 2.5 times ULN (≤ 5 times ULN in the presence of liver metastases) * Total bilirubin ≤ 1.5 times ULN * Serum creatinine ≤ 1.5 times ULN * Amylase and lipase ≤ 1.5 times ULN * Not pregnant or nursing * Weight loss from pre-disease weight \< 20% over the past 12 months * Able to swallow * No active or ischemic coronary artery disease * No myocardial infarction within the past 6 months * No NYHA class III-IV cardiac failure * No uncontrolled hypertension * No coagulopathy * No active uncontrolled peptic ulcer * No patients on renal dialysis * No active bacterial or fungal infection \> CTCAE v3.0 grade 2 * No HIV or hepatitis B or C positivity * No chronic unstable illness that could jeopardize patient safety or compliance * No oth…