Hello, My Husband Has Sudden Onset Of Yellow Palms. He

Hello, my husband has sudden onset of yellow palms. He has no other symptoms and we went to our family doctor yesterday who ordered blood tests to try and rule out Hepatitis or other causes. Specifically he doesn't have discolored stools or urine, stomach or back pain, nausea or headache. He did have two umbilical stem cell injections to try and repair a rotator cuff tear. We are obviously concerned about a Pancreatic Cancer possibility given that it often presents without symptoms. Are there any other possible causes? Thank you.