Obliterating Diabetic Microangiopathy of the Diabetic Foot

Primary endpoint of the study is to quantitatively evaluate the presence of microangiopathy as increase of capillary basement membrane thickness and decrease of capillary lumen area determined by transmission electron microscopy analysis in type 2 diabetic patients with only motor-sensory neuropathy or chronic critical ischemia affected by foot ulcer.

The following parameters will be evaluated:

• presence of capillary (n/mm2) and thrombosis (%) and correlation of this quantitative histological data with ischemic parameters (TcPO2, ankle-brachial index) and risk of diastasis
• correlation between presence of inflammatory infiltrate (leukocytes/mm2) with blood inflammatory parameters (erythrocyte sedimentation rate (ESR), C-reactive protein, alpha-2 globulin)
• rate of diastasis and/or time required for recovery associated with histopathological data
• presence of acanthosis related to clinical and demographic variables

Inclusion criteria

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• adult type 2 diabetic patients of either gender
• diabetes for more than 10 years
• motor-sensory diabetic neuropathy with or without chronic critical ischemia
• local residents
• ulcer with surgical therapy indication of removal the 1st ray because of gangrene or osteomyelitis

Exclusion criteria

• type 1 diabetic patients
• diabetes for less than 10 years
• renal replacement therapy
• urgent surgical procedure for sepsis
• immunosuppressive therapy
• not local residents

• Cancer with adverse prognosis in months, or chemotheraputic treatment
• Ongoing or planned pregnancy
• Lack of consent to participate to the study