What could be the cause of obstructive jaundice if a person has a palpable , non tender , movable , firm 5×3cm mass in the right upper quadrant area with jaundice, dark urine , itching, and epigastric burning pain

The most likely cause of obstructive jaundice with the given symptoms and findings of a palpable, non-tender, movable, firm mass in the right upper quadrant area is a pancreatic tumor.

Pancreatic tumors, particularly those in the head of the pancreas, can cause obstruction of the common bile duct, leading to jaundice. The mass itself may be felt during a physical examination. Dark urine (due to increased bilirubin excretion) and itching (due to elevated bilirubin levels in the bloodstream) are common symptoms of obstructive jaundice. Epigastric burning pain can also be a symptom of pancreatic tumors.

It is important for the person to undergo further investigations, such as imaging tests (e.g., ultrasound, CT scan, MRI) and laboratory tests, to confirm the diagnosis and determine the specific type of pancreatic tumor. Treatment options will depend on the type, size, and stage of the tumor, and may include surgery, radiation therapy, chemotherapy, or a combination of these approaches.