Skin lesions on the foot

Example of a MRSA infection started as a "rug burn" with this gentleman rough housing with his dog.

Many patients know about how important sunblock is to avoid cancer from the sun. However, most primary care doctors and even some dermatologists may miss looking at skin on the foot. Numerous times each year, we play a role in the diagnosis of skin disorders from biopsies of lesions on the foot and leg. Each lesion that the skin creates will tell a small story as to the inner health of each patient. And even if a lesion is not painful, or is located somewhere you are not usually able to look at, it can be something quite problematic.

We condone the biopsy of any lesion that changes colors, bleeds, or looks different than other lesions on your body. This may include open lesions, pigmented lesions, blistering lesions, and even rashes. The skin only has several ways to show a clinician that something is wrong. That means that thousands of disease processes can only be shown by skin in less than 10 ways. That is a tough thing to diagnose without a definitive biopsy. Most dermatologists require yearly skin exams for anyone with a prior squamous or basal cell carcinoma. And melanoma should be checked for at least 2x yearly. Lesions of the foot and ankle are often found by a foot and ankle surgeon prior to most other specialists or general practitioners, and it is imperitive that a biopsy be performed.

Lesions like the above can actually be a multitude of pathologies being represented by a simple rash. In this case tinea pedis was the diagnosis initially. After 2 months of topical therapy it was later diagnosed with a biopsy as a squamous cell carcinoma (skin cancer).

This is a common presentation of a plantar wart. This is also important to send to a pathologist if they are excised as this may also have several other more aggressive variations of melanomas which can mimic this otherwise harmless viral skin infection.

Any lesion that you are unsure of should get checked by a doctor, whether that is your foot and ankle surgeon, general practitioner, or dermatologist or other specialist. No lesion is too small, or insignificant to investigate.

Wound Care at FFLC

Diabetic pressure wounds are prevalent on the feet of many neuropathic patients. Usually, if the arterial circulation is adequate, and the nutrition status is evaluated for protein intake, the final step is to offload the area. This is, in my experience, the most difficult part of wound care in our population. Everyone wants to remain active, and walking is a major component of this mentality. This picture is an example of a forefoot pressure ulceration, which is directly related to an equinus deformity combined with neuropathy in an insulin dependent diabetic female who has been to a wound care center for 2 years prior to my evaluation. After my initial screening protocol, which consists of taking an xray, listening to the arterial pulse with a hand held dopplar, and recording a HA1c value to determine longterm blood glucose control, I moved on to the physical examination of biomechanics. In her case, the main issue was not an underlying bone infection, or ill fitting shoes (as she had custom shoes with offloading soft insoles already placed). A definitive diagnosis of "gastroc equinus" was diagnosed.






After 2 weeks of continued debridements in the office the wound began to improve, but the central deepest portion was next to impossible to offload.










At this time, the patient was scheduled for an endoscopic gastroc recession, which is done with a 0.7 cm incision that heals in most cases after 7 days. This is a profound procedure which offloads the forefoot considerably, and in her case was the final step towards healing her wound. She also had a dermal skin graft application which also heavily increased the healing capacity of this particular wound.






There are many examples of how wound care can be performed by looking at the global picture in each patient. Sometimes the foot structure itself is the issue and requires reconstruction. Sometimes a bone infection is underlying, and excision of that portion of the bone is required, and even sometimes a leg needs more circulation requiring vascular interventions. Here at FFLC, we strive to be at the cutting edge of limb salvage, which may entail any number of procedures tailored to each individual patient. We work closely with the infectious disease and vascular surgeons to offer a team oriented approach to wound care. This allows rapid wound healing, and lowers the statistical possibility of deep seeded infections which can lead to amputations.

Each wound has a cause, and without a thorough examination, followed by extensive diagnostics and microbiologic cultures, many wounds will remain nonhealed. At FFLC, we offer comprehensive limb salvage efforts which transcend most private offices. We really do have the mindset of a wound care center. Weekly comprehensive debridements, Xrays on site, MRI and ABI testing nearby, and for the more complex wounds a reconstruction repitoire which may consist of internal and external fixation. We take limb salvage very seriously, and we all know that once a limb is lost, the statistics are not in a patient's favor for a 5 year lifespan afterwards in diabetic patients.

Navicular Fractures in Athletes

Numerous patients experience this sort of injury living an active lifestyle in Naples Florida.

Recently, Ben Roethlesberger of the Pittsburg Steelers also suffered a similar injury (although not confirmed by the Steelers), and he may need some time off his foot to sufficiently heal his injury. We see a number of patients who will have the vague symptoms of pain after activity in the medial aspect of the rearfoot area, which will not show anything on regular xrays. After 3 months, most doctors will refer to us for further workup. We usually will obtain more advanced study such as CT or MRI, and depending on what it shows, treatment ensues. This is one of the latest articles regarding this topic, which in short, demonstrates how a minimally displaced fracture may still require screw fixation in select cases to adequately relieve symptoms and ensure return to sporting activity in a reasonable timeline.

Published in: Journal of Foot & Ankle Surgery, March/April, 2000
Amol Saxena, DPM


22 Navicular Stress Fractures sustained during athletic activity were retrospectively reviewed for return to activity time and the appearance of fracture pattern on Computerized Tomography. Average follow-up was 36.5 months. There were 10 females and nine males, with the average patient age being 27.2 years. Three patients sustained bilateral injuries at separate times.

Nine patients underwent open reduction, internal fixation (some with bone grafting); this group’s average return to activity (RTA) was 3.1 +1.2 months (range = 1.5-5 mos). Thirteen patients treated conservatively had an average return to activity of 4.3 +2.8months (range = 2 –13 months). The difference between the two groups’ RTA was significant (P=.02). Eleven patients utilized Pulsed Electromagnetic Fields and had an average RTA of 4.2 +3.4 months with three patients also having surgery. (The latter three patients had the fastest RTA at 3.0 months.) Two conservatively treated fractures that eventually took five and eight months to RTA, respectively, re-fractured during the treatment process.

Retrospective review showed CT fracture patterns in the frontal plane classified as: Dorsal cortical break (Type I), fracture propagation into the navicular body (Type II), and fracture propagation into another cortex (Type III). This is proposed as a classification system and is to include modifiers "A" (Avascular Necrosis of a portion of the navicular),"C" (Cystic changes of the fracture), and "S" (sclerosis of the margins of the fracture), the latter of which was most common in our series, particularly in continually symptomatic patients. Type I fractures were more likely to receive conservative treatment (P = .02) and Type III fractures took significantly longer to heal than Types I and II, (P values .001 and .01, respectively.) Type I and II injuries had an average RTA of 3.0 and 3.6 months, respectively. Type III injuries had an average RTA of 6.8 months. Based on our findings we recommend surgery for patients with these modifiers, particularly with Type II and III injuries.

Conservative treatment may be prolonged, and requires at least 6 weeks of non-weight bearing in a below knee cast/boot to be successful.