<prompt> True about macule:Flat lesion 2cmFlat lesion 2 cmElevated lesion 2cmElevated lesion 2cm  <response>: Ans. b Flat lesion 2 cmRef: Harrisons 19th ed. 319DESCRIPTION OF PRIMARY SKIN LESIONSMacule A flat, colored lesion, 2 cm in diameter, not raised above the surface of the surrounding skin. A freckle or ephelid, is a prototypical pigmented macule.Patch A large 2 cm flat lesion with a color different from the surrounding skin. This differs from a macule only in size.Papule A small, solid lesion, 0.5 cm in diameter, raised above the surface of the surrounding skin and thus palpable e.g. a closed comedone, or white-head in acne.Nodule A larger 0.5-5.0 cm, firm lesion raised above the surface of the surrounding skin. This differs from a papule only in size e.g. a large dermal nevomelanocytic nevus.Tumor A solid, raised growth 5cm in diameter.Plaque A large 1 cm, flat-topped, raised lesion; edges may either be distinct e.g,. psoriasis or gradually blend with skin e.g. in eczematous dermatitis.Vesicle A small, fluid lesion, 0.5 cm in diameter, raised above the pane of surrounding skin. Fluid is often visible, and the lesions are translucent e.g. vesicles in allergic contact dermatitis caused by Toxicodendron .Pustule A vesicle filled with leukocytes. Note: The presence of pustules does not necessarily signify the existence of an infection.Bulla A fluid-filled raised often translucent lesion 0.5cm in diameter.Wheal A raised erythematous, edematous papule of plaque, usually representing short-lived vasodilatation and vasopermeability.Telangiectasia A dilated, superficial blood vessel. 