An endoscope tip assembly , comprising: a ring-shaped base having a substantially cylindrical inner surface that is dimensioned to receive a distal end of an endoscope; and a collapsible umbrella extending radially out from the base, wherein the collapsible umbrella includes: a webbing forming a collapsible surface; and a plurality of flexible struts extending along the webbing and configured to flex to transition the collapsible umbrella between an insertion state and a withdrawal state; wherein the flexible struts radiate away from an outer surface of the base; wherein the webbing is continuous and is connected to each of the plurality of struts ; and wherein, in the insertion state, the plurality of struts are flexed toward a proximal direction extending substantially parallel with the outer surface of the base, and wherein, in the withdrawal state, the plurality of struts are flexed outward away from the outer surface of the base and the tip of each of the plurality of struts is pointed in a distal direction substantially parallel to the outer surface of the base characterised in that the flexible struts are each attached to the inner surface of the base and extend from the inner surface, around an proximal edge of the base ; and the webbing does not extend down the struts to meet with the base , and thereby a gap is formed. a ring-shaped base having a substantially cylindrical inner surface that is dimensioned to receive a distal end of an endoscope; and a collapsible umbrella extending radially out from the base, wherein the collapsible umbrella includes: a webbing forming a collapsible surface; and a plurality of flexible struts extending along the webbing and configured to flex to transition the collapsible umbrella between an insertion state and a withdrawal state; wherein the flexible struts radiate away from an outer surface of the base; wherein the webbing is continuous and is connected to each of the plurality of struts ; and wherein, in the insertion state, the plurality of struts are flexed toward a proximal direction extending substantially parallel with the outer surface of the base, and wherein, in the withdrawal state, the plurality of struts are flexed outward away from the outer surface of the base and the tip of each of the plurality of struts is pointed in a distal direction substantially parallel to the outer surface of the base characterised in that the flexible struts are each attached to the inner surface of the base and extend from the inner surface, around an proximal edge of the base ; and the webbing does not extend down the struts to meet with the base , and thereby a gap is formed. a webbing forming a collapsible surface; and a plurality of flexible struts extending along the webbing and configured to flex to transition the collapsible umbrella between an insertion state and a withdrawal state; wherein the flexible struts radiate away from an outer surface of the base; wherein the webbing is continuous and is connected to each of the plurality of struts ; and wherein, in the insertion state, the plurality of struts are flexed toward a proximal direction extending substantially parallel with the outer surface of the base, and wherein, in the withdrawal state, the plurality of struts are flexed outward away from the outer surface of the base and the tip of each of the plurality of struts is pointed in a distal direction substantially parallel to the outer surface of the base characterised in that the flexible struts are each attached to the inner surface of the base and extend from the inner surface, around an proximal edge of the base ; and the webbing does not extend down the struts to meet with the base , and thereby a gap is formed. <EOS>