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CLINICAL AND MORPHOLOGICAL COURSE OF INTERDIGITAL FOLLICULAR CYST IN DOGS

Vyacheslav Gorokhov, Anatoly Stekolnikov, Alexander Bokarev, Marina Narusbaeva, Anastasia Bluzma.

Using macromorphological, thermographic, ultrasound and radiographic (intravenous retrograde radiopaque angiography) methods of visual diagnostics, we investigated the correlation between pathogenesis and clinical signs of interdigital follicular cyst in dogs. And also, its clinical signs and course in comparison with other nonspecific poddermatitami. Studies have shown that, despite the external similarity with other nonspecific poddermatitis, interdigital follicular cyst has characteristic features as it proceeds with a certain staging. The first stage is characterized by inflammatory hyperemia, a local slight increase in temperature, coarsening of the plantar skin with the formation of comedones, but no changes in echogenicity and vascular pattern of the pathological focus. The second stage is characterized by even greater edema, hyperemia and a local increase in the temperature of the interdigital fold. There is a slight diffuse increase in the echogenicity of the pathological focus. But the vascular pattern, visualized by CPAA, in the area of the pathological focus, is not changed. The third stage is characterized by clearly visualized pustules from the dorsal side of the interdigital fold. An ultrasound clearly visualizes a cavity filled with fluid. The hyperemia is even more visualized and the local temperature increases. In the energy doppler mode, increased blood flow along the periphery of the cyst is visualized. CPAA visualizes the defect of the vessels in the area of the interdigital fold. The fourth stage is characterized by the formation of an ulcer from the dorsal side of the interdigital fold. At the same time, the ultrasound continues to clearly visualize the cavity filled with fluid. The CPAA visualizes a significant enhancement of the vascular pattern in the area of the lesion. The fifth stage is characterized by the formation of connective tissue scar at the site of cyst localization. At the same time, the area of the pathological focus becomes highly echogenic. In it vessels are poorly visualized and the intensity of blood flow is lowered. Thus, a clear staging of the clinico-morphological course of the interdigital follicular cyst indicates the specificity of this disease, which distinguishes it from the subdermatitis of another etiopathogenesis and must necessarily affect its treatment method. Key Words: interdigital follicular cyst, dog, radiography, ultrasound, thermography.

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