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Ultrasound Feature-Based Diagnostic Model Focusing on the “Submarine Sign” for Epidermal Cysts among Superficial Soft Tissue Lesions
Korean Journal of Radiology ; : 1409-1421, 2019.
Artículo en Inglés | WPRIM | ID: wpr-760254
ABSTRACT

OBJECTIVE:

To develop a diagnostic model for superficial soft tissue lesions to differentiate epidermal cyst (EC) from other lesions based on ultrasound (US) features. MATERIALS AND

METHODS:

This retrospective study included 205 patients who had undergone US examinations for superficial soft tissue lesions and subsequent surgical excision. The study population was divided into the derivation set (n = 112) and validation set (n = 93) according to the imaging date. The following US features were analyzed to determine those that could discriminate EC from other lesions more-than-half-depth involvement of the dermal layer, “submarine sign” (focal projection of the hypoechoic portion to the epidermis), posterior acoustic enhancement, posterior wall enhancement, morphology, shape, echogenicity, vascularity, and perilesional fat change. Using multivariable logistic regression, a diagnostic model was constructed and visualized as a nomogram. The performance of the diagnostic model was assessed by calculating the area under the curve (AUC) of the receiver operating characteristic curve and calibration plot in both the derivation and validation sets.

RESULTS:

More-than-half-depth involvement of the dermal layer (odds ratio [OR] = 3.35; p = 0.051), “submarine sign” (OR = 12.2; p < 0.001), and morphology (OR = 5.44; p = 0.002) were features that outweighed the others when diagnosing EC. The diagnostic model based on these features showed good discrimination ability in both the derivation set (AUC = 0.888, 95% confidence interval [95% CI] = 0.825–0.950) and validation set (AUC = 0.902, 95% CI = 0.832–0.972).

CONCLUSION:

More-than-half-depth of involvement of the dermal layer, “submarine sign,” and morphology are relatively better US features than the others for diagnosing EC.
Asunto(s)

Texto completo: Disponible Índice: WPRIM (Pacífico Occidental) Asunto principal: Acústica / Calibración / Modelos Logísticos / Estudios Retrospectivos / Curva ROC / Ultrasonografía / Nomogramas / Discriminación en Psicología / Quiste Epidérmico Tipo de estudio: Estudio diagnóstico / Estudio observacional / Estudio pronóstico / Factores de riesgo Límite: Humanos Idioma: Inglés Revista: Korean Journal of Radiology Año: 2019 Tipo del documento: Artículo

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Texto completo: Disponible Índice: WPRIM (Pacífico Occidental) Asunto principal: Acústica / Calibración / Modelos Logísticos / Estudios Retrospectivos / Curva ROC / Ultrasonografía / Nomogramas / Discriminación en Psicología / Quiste Epidérmico Tipo de estudio: Estudio diagnóstico / Estudio observacional / Estudio pronóstico / Factores de riesgo Límite: Humanos Idioma: Inglés Revista: Korean Journal of Radiology Año: 2019 Tipo del documento: Artículo