Diagnosis: Plantar callus
A 35-year-old male runner presents with a thickened yellow lesion on the ball of his foot, which has developed over the past few months. He reports discomfort during running, prompting him to seek evaluation. Clinical examination reveals a well-defined, hyperkeratotic area consistent with a common foot condition seen in athletes.
A 35-year-old male runner presents with a thickened yellow lesion on the ball of his foot, which has developed over the past few months. He reports discomfort during running, prompting him to seek evaluation. Examination shows a well-defined, hyperkeratotic area on the plantar aspect of the foot.Location: Lesion is located on the ball of the foot.Appearance: Well-defined, thickened yellowish area with a smooth surface.Symptomatology: Mild tenderness noted upon palpation.Surrounding skin: Normal skin appearance without signs of inflammation.Footwear history: Patient reports frequent use of running shoes with insufficient cushioning.
The lesion began approximately 4 months ago, coinciding with an increase in running distance and frequency. The patient has not attempted any treatments prior to this visit. He has a history of running-related foot issues but no previous dermatologic conditions. There is no significant family history of skin disorders, and he denies any recent travel or exposure to new footwear.Onset: Gradual development over 4 months.Triggers: Increase in running activity and distance.Prior treatments: None attempted prior to consultation.Medical history: No significant past medical history.Social history: Active lifestyle with regular running.Footwear: Frequently wears supportive running shoes.
Acute / First-Line ManagementDebridement: Gentle debridement of the hyperkeratotic tissue can be performed to alleviate discomfort.Topical keratolytics: Salicylic acid 40% plaster can be applied to the affected area to promote exfoliation, used once daily until resolution.Footwear modification: Advise the use of well-cushioned shoes and orthotics as needed to redistribute pressure.Padding: Use of protective padding over the area during activity to reduce friction and pressure.Workup and Diagnostic ConfirmationClinical examination: Diagnosis is primarily clinical based on history and examination findings.Dermatoscopy: May be utilized to rule out other conditions such as warts or lesions.Biopsy: Rarely indicated but may be considered if the diagnosis is uncertain or if atypical features are present.Long-Term ManagementContinued monitoring: Regular follow-up to assess recurrence and effectiveness of treatment.Education: Patient education on proper foot care and the importance of footwear.Preventive measures: Encourage routine foot inspections and prompt treatment of any new lesions.Referral: Consider referral to a podiatrist for persistent symptoms or recurrent lesions.
Plantar wart: Often presents with a central keratotic plug and can cause pain on pressure; may have small black dots (thrombosed capillaries) visible on examination.Callus: A thicker area of skin due to friction; typically asymptomatic unless pressure is applied.Corn: A painful, localized thickening of skin with a central core, usually found on bony prominences; often painful on palpation.Fungal infection: Tinea pedis may mimic callus but usually presents with scaling and erythema; often involves interdigital spaces.Psoriasis: May cause thickened skin on the feet but typically associated with other psoriatic lesions and scaling.Hyperkeratotic eczema: Can present with thickened skin but usually has an inflammatory component with pruritus.Squamous cell carcinoma: Rare but can present as a keratotic lesion; often has concerning features such as ulceration or bleeding.Other benign tumors: Such as lipomas or fibromas, may present with unusual characteristics but are less common.
High-Yield PearlsDiagnosis: A thorough clinical examination is often sufficient for diagnosing common foot lesions in athletes.Prevention: Proper footwear and foot care are crucial in preventing the development of plantar lesions.Keratolytics: Salicylic acid is a first-line treatment for hyperkeratotic lesions, promoting exfoliation and symptom relief.Monitoring: Regular follow-up is essential to monitor for recurrence and manage any complications effectively.Patient education: Educating patients on the importance of foot hygiene and proper footwear can significantly reduce recurrence rates.Understanding the biomechanics of foot lesions can guide effective prevention and management strategies.
Tags: plantar callus, runner