Sclerosing Angiomatoid Nodular Transformation (SANT) – Malignant Variant
Sclerosing Angiomatoid Nodular Transformation, commonly called SANT, is a rare condition that affects the spleen. The spleen is an organ in the upper left side of the abdomen that helps filter blood and fight infections. In most cases, SANT is a non-cancerous (benign) condition made up of abnormal blood vessel growth inside the spleen.
However, in very rare situations, a malignant (cancerous) variant can develop. In this form, the cells behave abnormally, grow more aggressively, and may have the ability to spread. This malignant version is extremely uncommon and is considered a rare vascular tumour of the spleen.
Incidence
This condition is very rare. The benign form of SANT is uncommon, and the malignant variant is even rarer, with very few cases reported. It can occur in adults and is slightly more often seen in middle-aged individuals.
Symptoms
Many people do not have any symptoms, especially in early stages. The condition is often discovered accidentally during scans done for another reason.
When symptoms do occur, they may include pain or discomfort in the upper left side of the abdomen, a feeling of fullness, or swelling. Some individuals may feel tired or weak. In rare cases, enlargement of the spleen may occur. If the tumour grows larger, it can press on nearby organs and cause discomfort.
Diagnosis
Imaging tests such as ultrasound, CT scan, or MRI are used to detect a mass in the spleen. These tests can suggest the diagnosis but cannot always clearly tell whether it is benign or malignant.
To confirm the diagnosis, the spleen is often surgically removed, and the tissue is examined under a microscope. This helps identify abnormal vascular patterns and determine if there are cancerous changes.
Treatment
The main treatment is surgical removal of the spleen, a procedure known as splenectomy. This not only confirms the diagnosis but also removes the tumour completely. In malignant cases, further treatment such as chemotherapy may be considered depending on how aggressive the tumour is.
Prognosis
The prognosis depends on whether the tumour is benign or malignant. Benign SANT has an excellent outcome after surgery. In the malignant variant, the outcome can vary. Some cases may behave aggressively, while others may be controlled with treatment. Early detection and complete removal improve the chances of a better outcome. Regular follow-up is important to monitor for recurrence.
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