| It is characterized by pruritic, of ten excoriated papules and nodules on the extensor surfaces of the legs and upper arms. |
| Erythematous papules and pustules characterize inflammatory acne, but comedones may also be present. |
| The lesions develop into 1-5 mm yellow-grey papules or pustules, with surrounding erythema, confined to the follicular ostia. |
| In patients with the malar rash of systemic lupus erythematosus, papules may be present, but pustules are rare. |
| Mild acne is characterized by the presence of few to several papules and pustules, but no nodules. |
| Metastases from cutaneous melanoma normally present as flesh coloured papules or nodules in the skin. |
