Diagnosis: Pitted keratolysis
A 24-year-old male basketball player presents with a 2-month history of foul-smelling, pitted lesions on the soles of his feet. Despite regular foot hygiene, the condition has worsened, impacting his athletic performance and quality of life.
The patient is a 24-year-old male basketball player who reports a 2-month history of foul-smelling, pitted lesions on the soles of his feet. On examination, there are multiple distinctive pitted depressions on the plantar surfaces, particularly in weight-bearing areas, with associated erythema and hyperhidrosis. The lesions emit a strong odor, contributing to his discomfort and embarrassment.Pitted depressions predominantly on the plantar surfaces.Foul odor noted upon examination.Hyperhidrosis present, particularly in the interdigitating spaces.Erythema surrounding the lesions.No associated pain or systemic symptoms reported.
The condition began insidiously, with the patient noticing the pitted lesions after an increase in basketball training and sweating. He has not experienced similar issues in the past and has tried over-the-counter antifungal powders without improvement. The patient has no significant past medical history and denies any family history of skin disorders. He has a highly active lifestyle, frequently wearing closed athletic shoes.Insidious onset following increased physical activity.No prior treatments effective; over-the-counter antifungal powders were used.No significant past medical history or family history of dermatologic conditions.High physical activity level, particularly in warm, moist conditions.Closed athletic shoes worn daily.
Acute / First-Line ManagementTopical antibiotics such as clindamycin 1% gel applied twice daily for 2-4 weeks.Consider topical aluminum chloride for excessive sweating, applied nightly.Encourage foot hygiene with antifungal soap and regular changes of footwear and socks.Workup and Diagnostic ConfirmationClinical diagnosis is often sufficient; however, a potassium hydroxide (KOH) prep can rule out fungal infection.Consider a culture if secondary infection is suspected.In chronic cases, a skin biopsy may be warranted to exclude other conditions.Long-Term ManagementMaintain foot hygiene with daily washing and thorough drying.Use antifungal powders prophylactically in athletic footwear.Encourage wearing breathable footwear to reduce moisture accumulation.Regular follow-up to monitor response to treatment and prevent recurrence.
Interdigital tinea pedis: Characterized by scaling and erythema between toes, often with a more defined border and less pitting.Hyperhidrosis: Excessive sweating can exacerbate foot odor and contribute to skin changes but typically lacks the pitting feature.Psoriasis: May present with pitting but usually includes well-defined plaques and is not limited to the soles.Dyshidrotic eczema: Presents with vesicular lesions on palms and soles, often itchy, and without a foul odor.Contact dermatitis: Can cause skin changes due to irritants or allergens, often with associated itching and inflammation.Fungal infections: Other superficial fungal infections can mimic symptoms but typically do not produce pitting.Keratosis pilaris: Presents as small, rough bumps but is not associated with odor or pitting.Secondary bacterial infection: Can occur in the setting of other dermatoses and may present with odor, but would typically show more inflammation.
High-Yield PearlsDiagnosis: Pitted keratolysis is commonly seen in athletes and can be mistaken for fungal infections.Odor: The characteristic foul odor is a key feature that can aid in diagnosis.Topical therapy: First-line management includes topical antibiotics and measures to reduce moisture.Preventive care: Foot hygiene and breathable footwear are crucial for long-term management.Follow-up: Regular monitoring is important to assess treatment efficacy and prevent recurrence.Remember: Pitted keratolysis often occurs in active individuals and is characterized by pitting and a distinctive odor.
Tags: pitted keratolysis, athlete