Hepatic angiosarcoma misdiagnosed in a patient with occupational chemical exposure: A case report and literature review

The liver is a resilient organ, but it can harbor tumors that are deceptively difficult to identify. Among the many types of liver growths, some are benign, meaning they are harmless and do not spread, while others are malignant and aggressive. A particularly rare and dangerous type of cancer is primary hepatic angiosarcoma. This is a tumor that arises from the cells lining the blood vessels within the liver. Unlike common liver cancers that often stem from chronic inflammation or viral infections, this specific cancer is strongly linked to long-term exposure to certain industrial chemicals, such as vinyl chloride and arsenic, which workers might encounter in factories or chemical plants. The challenge for doctors lies in the fact that these dangerous tumors can look exactly like harmless, benign blood vessel growths called hemangiomas on standard medical scans. Because the two conditions appear so similar in images, a dangerous cancer can be mistaken for a safe lump, leading to a delay in treatment that can be fatal.

This case report tells the story of a sixty-five-year-old man who arrived at a hospital in critical condition, illustrating how quickly this confusion can turn into a tragedy. The man had spent over a decade working in a chemical plant during his youth, a history that would later become a crucial clue. Three months before his emergency visit, he had undergone a scan at another hospital that identified a growth in his liver. The doctors there, seeing the familiar pattern of a blood-filled mass, diagnosed it as a benign hemangioma. The man was told to monitor the situation but did not return for further checks. Three months later, he collapsed in severe pain, his blood pressure dropping dangerously low and his skin turning pale, signs that he was bleeding internally. When doctors performed a new scan, they saw that the liver mass had grown rapidly and burst open, causing life-threatening hemorrhage. The image of the ruptured tumor, along with a small satellite nodule nearby, suggested a malignant process rather than a benign one.

Faced with a patient who was stable enough to survive surgery but in immediate danger of bleeding to death, the medical team performed an emergency operation to remove the right side of his liver. They found the tumor had indeed ruptured, yet the outer covering of the liver remained intact, allowing them to complete the removal without further complications. Once the tissue was examined under a microscope, the true nature of the disease was revealed. The cells tested positive for specific markers that identify blood vessel tumors and negative for markers associated with common liver cancers. The diagnosis was confirmed as primary hepatic angiosarcoma. Despite the successful removal of the entire visible tumor and the patient's initial recovery, the disease proved too aggressive. Follow-up calls confirmed that the man passed away just three months after his surgery.

The story of this patient highlights a critical gap in medical understanding and practice. The authors of the report emphasize that a diagnosis of a benign liver hemangioma should never be accepted at face value if the patient has a history of exposure to industrial chemicals. In this specific case, the tumor transformed from a small, seemingly harmless mass into a ruptured, fatal cancer in a span of only three months. This rapid progression is a hallmark of angiosarcoma and is extremely rare for a benign hemangioma, which typically grows very slowly and rarely bursts. The case serves as a stark reminder that the visual appearance of a tumor on a scan is not always enough to determine its nature, especially when the patient's history includes risk factors like chemical exposure.

The medical team also noted the difficulty in confirming this diagnosis before surgery. In many cases, doctors might try to take a small sample of the tissue with a needle to check for cancer. However, because this tumor is made of blood vessels, a needle biopsy carries a high risk of causing severe bleeding or spreading cancer cells along the needle path. In this instance, the patient's condition was too unstable to wait for a biopsy, so the doctors proceeded directly to removing the tumor. This approach allowed them to stop the bleeding and secure a diagnosis simultaneously, but it also meant the patient did not receive a preoperative confirmation of the cancer's type. The study suggests that for patients with chemical exposure histories, a sudden change in a liver mass or a rupture should trigger an immediate re-evaluation and likely surgical intervention, rather than a wait-and-see approach.

Ultimately, the outcome of this case underscores the grim reality of primary hepatic angiosarcoma. Even when the tumor is completely removed during surgery, the long-term outlook remains very poor. Most patients with this cancer do not survive long after diagnosis, and those who present with a ruptured tumor face an even more dire prognosis. The authors conclude that the combination of occupational chemical exposure, rapid tumor growth, and spontaneous rupture forms a dangerous triad that should alert clinicians to the possibility of this specific cancer. While the surgery in this case was technically successful, the speed at which the disease returned and claimed the patient's life illustrates that early detection before a rupture occurs is the only realistic path to extending survival. For doctors and patients alike, the lesson is clear: in the presence of chemical exposure, a liver mass that changes quickly or breaks open is a medical emergency that demands immediate and aggressive action.