Hyperkeratosis of the nipple and/or areola (HNA) is defined as excessive keratinization of the nipple and/or areola. Hyperkeratosis of the nipple and/or areola is characterized by hyperpigmented, verrucous or filiform, keratotic thickening of the nipple and/or areola, with a papillomatosis or velvety sensation to touch.
2018.3-23.hyperkeratosis - Our Dermatology Online
Figure 3 from The Dilemma of Coexisting Nevoid Hyperkeratosis of the Nipple and Areola in Mycosis Fungoides: A Report of Three Cases
Bilateral nevoid hyperkeratosis of nipple and areola: A rare entity - Journal of Skin and Sexually Transmitted Diseases
Nipple adenoma in a female patient presenting with persistent
Co-existence of hyperkeratosis of the nipple and supernumerary nipple in a young woman: Clinical and dermoscopic characteristics - Indian Journal of Dermatology, Venereology and Leprology
PDF] Nevoid hyperkeratosis of the nipple mimicking a seborreic keratosis
Unilateral nevoid hyperkeratosis of the nipple: A report of two cases - Indian Journal of Dermatology, Venereology and Leprology
Bilateral idiopathic hyperkeratosis of the nipple and areola
Nevoid Hyperkeratosis Of The Nipple And Areola
Normal Areola & Nipple Changes in Pregnancy