Acanthosis nigricans is seen in -
Acanthiosis nigraicans are of several types. Benign includes obesity related, hereditary, syndromic, acral, endocrine and drug induced. Malignant associated with gastric adenocarcinoma and genitourinary cancers. Iadvl textbook of dermatology page 1010
Diabetes
GIT cancer
Hypothyroidism
All of the above
Skin lesions and disorders of pigmentation