Acanthosis nigricans (AN) is characterized by velvety, hyperpigmented, verrucous, symmetric and occasionally pruritic plaques along with papillomatous lesions which have a special predilection for neck, axillae, groin, umbilicu and mucosal regions. Rarely, it presents as a paraneoplastic syndrome and prompts a thorough search for an internal malignancy. We present here a case of malignant acant...

Acanthosis nigricans is a common dermatosis and is most often associated with benign conditions, such as insulin resistance. It is rare as a paraneoplastic marker. As such, it is characterized by sudden onset and rapid dissemination of velvety and hyperchromic skin lesions. The term "tripe palm" refers to exaggeration of the palmar ridge pattern, which resembles the internal surface of the bovi...

We report the case of 17-year-old female diagnosed with Costello syndrome. Genetic testing provided a proof with G12S mutation in the HRAS gene since 3 years of age with a presentation of severe nodulocystic acne on her face. After 2 months of oral isotretinoin treatment, improvement in her acne was observed. Interestingly, an unexpected significant improvement of acanthosis nigricans on her ne...

Dowling-Degos disease (DDD) is a rare autosomal dominant inherited pigmentary disorder of the flexures with a reticulate aspect and with presence of prominent comedone-like lesions and pitted scars. The diagnosis includes acanthosis nigricans as well as other reticulate pigmentary disorders classified into: dyschromatrosis symmetrica hereditaria (DSH), dyschromatosis universalis hereditaria (DU...

with normal growth and developmental milestones, presented with asymptomatic generalized hyperpigmentation. It started spontaneously at the age of 2 years, around the neck and axilla, and spread insidiously to involve the other parts of body. The skin gradually became thickened and rugose. There was no history of drug intake, polyuria, polydypsia, loss of appetite, excess weight gain or loss. C...

a 25-year-old woman with a history of five years of bilateral verrucous hyperkeratosis and darkening of both nipples and areolae is reported herein. the histopathology was suggestive of hyperkeratosis of areola and nipple. hyperkeratosis of areola and nipple is a rare condition which is seen unilaterally or bilaterally in both sexes. three types of hyperkeratosis of areola and nipple are descri...

AN: acanthosis nigricans CTD: connective tissue disease ILD: interstitial lung disease NSIP: nonspecific interstitial pneumonia TP: tripe palms INTRODUCTION Tripe palms [(TP); acral acanthosis nigricans (AN)], is a rare cutaneous syndrome in which the palms develop velvety thickening and rugosity that creates an exaggeration or distortion of dermatoglyphics, resembling boiled tripe. In more tha...