Hyperpigmented lesions are

B i.e. Melanoma Hyperpigmentation (hyper melanosis) of skin is seen in endocrine disorders like Addison's diseaseQ, acromegaly, Nelson's syndrome, Cushing's (ectopic ACTH) syndromeQ, carcinoid syndrome, pheochromocytoma, and hypehyroidism (Grave's disease) but not in hypothyroidism or myxedeme. Melanoma, dyskeratosis congenita & lentigines lichen planusQ cause hyperpigmentation.