Indian Journal of Dermatology
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Year : 2007  |  Volume : 52  |  Issue : 3  |  Page : 141-144

Hyperpigmented keratotic plaques below the elbow and above the knee: An unexplored entity?

Department of Dermatology, RKM Seva Pratisthan and Vivekananda Institute of Medical Sciences, Kolkata, India

Correspondence Address:
Sujata Sengupta
UV-24/3C, Udayan, 1050/1, Survey Park, Kolkata - 700 075
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0019-5154.35093

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Background: Hyperpigmented keratotic lesions below the elbow and above the knee are common, but not yet described in the literature. Aim: To clinicopathologically analyze the lesions to find out their etiology, aggravating factors, associated diseases and histopathological features. Materials and Methods: Thirty patients having such lesions were subjected to detailed history-taking and clinical examination. A biopsy from the local area was performed in all the cases. The data obtained was statistically analyzed. Results: The commonest age group affected comprised of middle-aged females. In 50% cases, friction played an important role, and in the rest, no cause was found. Majority of patients had no other dermatological or systemic disorders. Nonspecific histopathologic changes were observed in 60%. Conclusion: Our study points towards the existence of an idiopathic hyperpigmentation around the elbow and knee that is common and not associated with any other skin disorder and is histologically nonspecific.

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