Features of ultrasound diagnostics of postoperative hypertrophic and keloid scars
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Author(s)
Features of ultrasound diagnostics of postoperative hypertrophic and keloid scars David Avetikov
The problem of pathological skin scar as the final stage of wound healing is currently a topical issue. We have studied the possibility of differential diagnosis of head and neck hypertrophic and keloid scars, by establishing its echogenic differences using ultrasound. We observed 50 patients aged from 15 to 30 with hypertrophic and keloid scars on the head and neck. We have selected patients with optically visualized hypertrophic painless scars which were formed within several weeks. There were enriched blood vessels inside the wound. The intact skin obtained from 50 healthy people was used for comparison. While speaking about a group of patients with keloid
scars, it should be noted that formation of this type of scarred tissue lasts for several months, occurs in the age of 25 to 40, is painless but with itching, extending beyond the wound. Ultrasound differentiation of postoperative hypertrophic and keloid scars of layered structure was applied, taking into account the fact that the echolocation wave (21-25 Kts frequency) may change the penetration rate depending on the density and elastic qualities of dermis and subcutaneous fatty epidermis tissues.
In this research, ultrasound revealed that the hypertrophic scar tissue was visualized with clear contours, its thickness decreases along the periphery of the scar and reaches its maximum values in its center. In 97% of cases it was characterized by a hypoechogenic sign that, in our opinion, is an important ultrasound characteristic. The study marked a decrease in the thickness of keloid scars when compared to hypertrophic scars by 18-26% on the average. With regard to the echogenicity of this type, its unevenness in all areas should be noted. Gipoehogennye areas of irregular polygonal form were recorded in 62% of cases. Ultrasound of scars is a non-invasive
method of examination, through which it is possible to evaluate numerous anatomical structures objectively, informatively and safely as well as to determine the type and depth of scar formation.
This method allows to establish echogenic differences of postoperative hypertrophic skin scars in comparison with the intact skin by mean of ultrasonic waves.
DOI: https://ysmu.am/v2/wp-content/uploads/2023/05/768c9eab.pdf The New Armenian Medical Journal Vol.12 (2018), Nо 4 43-48
