<prompt> Apple-jelly nodules isare seen in:Lupus vulgarisDLELichen planusPsoriasis  <response>: Ans: A Lupus vulgaris Apple jelly nodules:characterized by yellow-brown nodules with tiny darker granules. On probing, the noduies are soft jelly-like- Neena Khanna 3rd217Lupus Vulgaris Neena Khanna 3rd217MorphologySingle or few lesions.Well demarcated, annular or arcuate plaques which slowly extend centrifugally. Periphery shows erythematous to brownish, deep seated nodules which on diascopy9 may stand out as apple jelly nodules..Over period of time, the center becomes atrophic paper thin, depigmented and scarred. Characteristically, new nodules may appear within area of scarringFeatures of Psoriasis are: Isomorphic phenomenon for Koebners phenomenon, ring of Woronoff, a hypopigmented halo surrounding plaque, silvery scales, positive grattage test, Auspitz sign, Munros micro-abscesses etc- Neena Khanna 3rd40-41Psoriasis Neena Khanna 3rd38It is a chronic dermatosis characterized by an unpredictable course of remissions and relapses and presence at typical sites of papules and plaques which are:Well definedErythematous.Surmounted with large, silvery, loose scales.DLE Neena Khanna 3rd 186Characteristic lesion is a well demarcated coin shaped discoid, annular, erythematous plaque with adherent scalesWhen the scale is removed, its undersurface shows keratotic spikes which have occupied the dilated pilosebaceous canals carpet tack signFeatures of Licken planus are: Isomorphic phenomenon or Koebners phenomenon, Wickhams striae surface has white streaks when viewed under a magnifying lens- Neena Khanna 3rd 52 