Dermatology DD Macule and Patch

Infectious

Leprosy
Secondary Syphilis (anetodermic)
Tertiary Syphilis
Tuberculosis

Traumatic

Photoaging
Radiodermatitis
Scar

Medicinal

Post steroid  application or injection

Idiopathic

Acrodermatitis Chronica  atrophicans
Anetoderma
Atrophic Lichen Planus
Atrophoderma of Pasini and perini(a variant of  Morphea)
Dermatomyositis
Lichen sclerosis et atrophicus
Macular Atrophy
Malignant Atrophic Dermatosis(dego's Disease)
Morphea
Necrobiosis Lipoidica Diabeticorum
Poikiloderma Atrophicans vasculare
Sarcoidosis
Scleroderma
Striae