def create_tumor_string(tumor_dict_list):
    """Function to create tumor list string from tumor_type list of dicts"""
    if not tumor_dict_list:
        return None, None
    tumors = []
    db_disease_keywords = []
    for tumor in tumor_dict_list:
        abberration = tumor["abbr"]
        name = tumor["tumor_name"]
        if name != "":
            db_disease_keywords.append(name)
        if abberration != "":
            tumors.append(abberration)
        elif abberration == "" and name != "":
            tumors.append(name)
        else:
            continue
    tumor_string = "|".join(tumors)
    db_disease_string = "|".join(db_disease_keywords)
    return tumor_string, db_disease_string