Imaging Features of Spinal Hemangioendothelioma Simulating Tuberculous Spondylitis: A Case Report

The human spine is a complex structure of bone and nerve that supports the body and protects the spinal cord. When this area becomes diseased, the symptoms often look the same regardless of the cause. Pain in the back or chest, stiffness, and weakness can signal an infection like tuberculosis, a spreading cancer, or a primary tumor growing within the bone itself. In many parts of the world, tuberculosis remains a common cause of spinal infection, where bacteria eat away at the vertebrae and create soft, inflamed masses. Doctors rely heavily on medical scans to tell these conditions apart, looking for specific patterns of bone damage and tissue changes. However, nature does not always follow the textbook patterns, and sometimes a rare tumor can mimic the appearance of a common infection so closely that even experienced specialists are fooled.

This story comes from a hospital in Shenzhen, China, where a team of doctors encountered a patient whose case challenged their initial assumptions. The patient was a 59-year-old man who had suffered from pain in his chest and back for a year. Over the last month, the pain had become worse. He did not have a fever, had not lost weight, and had no history of cancer or tuberculosis in his family. When doctors examined him, they found tenderness when tapping on a specific bone in his upper back, the eleventh thoracic vertebra. Blood tests showed only minor signs of inflammation, nothing that pointed clearly to one disease or another.

The doctors turned to imaging to see what was happening inside the bone. A computed tomography scan, which uses X-rays to create detailed cross-sections of the body, revealed a hole in the bone of that vertebra. The scan also showed thickening of the lining around the lungs and small patches of scar tissue in the lungs themselves. These lung findings, combined with the bone damage, strongly suggested an infection. A magnetic resonance imaging scan, which uses magnetic fields to show soft tissues in great detail, confirmed the damage to the bone and showed a mass of tissue growing just under the ligaments in front of the spine. The doctors saw that the bone was being destroyed, but the disc space between the vertebrae remained intact, a feature often seen in spinal tuberculosis. Based on these images and the fact that tuberculosis is common in their region, the medical team concluded the patient had spinal tuberculosis.

Following this diagnosis, the surgeons performed a major operation to remove the infected tissue and stabilize the spine. They approached from the back of the patient, scraping away the diseased bone and replacing it with a graft from the patient's own body. During the surgery, they found that the mass under the ligament was made of granulation tissue and bloody fluid, but there was no thick, pus-filled abscess that is typical of a severe bacterial infection. Despite this, the team continued with the plan to treat the patient for tuberculosis.

The true nature of the disease was revealed only after the removed tissue was examined under a microscope by a pathologist. The cells did not look like bacteria or the immune cells that fight infection. Instead, the tissue was filled with irregular channels lined with cells that looked like the inner lining of blood vessels. These cells were abnormal and showed signs of rapid division. The final diagnosis was not tuberculosis, but a rare type of low-grade cancer called a hemangioendothelioma. This is a tumor that arises from the blood vessels within the bone. It is distinct from a common benign hemangioma, which is a harmless cluster of blood vessels, and from a highly aggressive cancer called angiosarcoma. The tests for tuberculosis bacteria were also negative, confirming that the patient did not have an infection.

This case highlights a critical lesson for medical practice. While imaging scans are powerful tools, they are not perfect. In this instance, the tumor looked exactly like the infection the doctors expected to find. The presence of lung scarring and the specific pattern of bone destruction led the team to a logical but incorrect conclusion. The only way to be certain of the diagnosis was to look at the cells themselves. The authors of the report emphasize that when a spinal lesion presents in a way that could be either an infection or a tumor, relying on scans alone is risky. A tissue sample, obtained through a biopsy or surgery, is essential to distinguish between the two. Without this microscopic proof, a patient might receive the wrong treatment, such as months of antibiotics for a disease that requires surgery and different therapies.

The patient in this story recovered well after the surgery, and the misdiagnosis did not lead to long-term harm, but the experience serves as a reminder of the complexity of spinal diseases. Tumors that grow from blood vessels in the bone are rare, and when they appear in the spine, they are even rarer. They can mimic the appearance of common infections so closely that the only way to tell them apart is through careful pathological examination. This case reinforces the need for doctors to remain open to the possibility of rare conditions, even when the evidence points strongly toward a common one, and to always seek a definitive tissue diagnosis before committing to a long-term treatment plan.