[名词解释] 强直性脊柱炎

下列哪项X线征象不是良性胃溃疡的表现() ["A．腔内龛影","B．粘膜纠集","C．汗普顿(hampton)线","D．胃小弯缩短","E．腔外龛影"] 腰椎间盘突出症 跟痛症 肱骨外上髁炎 继发性骨质疏松症 强直性脊柱炎