Fungus – Pitted Keratolysis

September 21st, 2010

Pitted KeratolysisPitted keratolysis is not a fungus but is a clinical mimicker of tinea pedis (athlete’s foot).  It is rather rare in Montgomery County as I only encounter pitted keratolysis about once a month in my Conroe dermatology and the Woodlands dermatology clinics.  It is caused by bacteria called Kytococcus sedentarius.

Where is Pitted Keratolysis Most Common?

Typically, the weight-bearing areas of the feet develop yellowish pits in the skin ranging in size from 2 to 3 mm.  The bacteria live in the stratum corneum, the most superficial layer of the epidermis, and releases serine proteases, which are enzymes that digest proteins thus enabling the pits to form.  The hands can rarely develop pitted keratolysis.  Pitted Keratolysis is most commonly seen in men and an environment in which the feet are hot and moist favors the growth of Kytococcus sendentarius.  The treatment involves topical antibiotic solutions such as clindamycin or erythyromycin.  In severe cases, an oral antibiotic such as azithromycin or erythromycin can be used.  The pits resolve without any scarring and I advise patients to keep their feet dry to prevent a recurrence.

Dr. Perri is an experienced dermatologist that can help diagnose and treat your fungus. Contact him in The Woodlands or Conroe for a consultation today.