眼表面腫瘍性疾患の診断モデルとしての深層学習

To develop a deep learning (DL) model for diagnosing ocular surface tumors and evaluating its diagnostic performance.

Development of a deep learning diagnosis algorithm.

A total of 1,491 ocular surface images representing seven diseases-nevus (28 eyes), limbal dermoid (144), MALT lymphoma (20), ocular surface squamous neoplasia (OSSN; 138), melanoma (14), pinguecula (29), and pterygium (1,118)-were captured using slit-lamp microscopy. A YOLOv5-based DL model was trained using five-fold cross-validation. Diagnostic performance was compared using 299 external validation images assessed by eight corneal specialists, seven board-certified ophthalmologists, and eight residents.

The model achieved a positive predictive value (PPV) of 96.0%, outperforming the corneal specialists (95.0 ± 2.1%), board-certified ophthalmologists (82.6 ± 11.9%), and residents (81.9 ± 10.7%). Disease-specific PPVs were: nevus 75.0%, limbal dermoid 93.5%, MALT lymphoma 57.9%, OSSN 87.0%, melanoma 38.5%, pinguecula 82.1%, and pterygium 96.7%. The area under the curve (AUC) was: nevus 0.897 (95% confidence interval [CI], 0.810 - 0.983), limbal dermoid 0.998 (95%CI, 0.996 -1.000), MALT lymphoma 0.894 (95%CI, 0.794 - 0.993), OSSN 0.954 (95%CI, 0.933 - 0.975), melanoma 0.966 (95%CI, 0.919 - 1.000), pinguecula 0.954 (95%CI, 0.912 - 0.995), and pterygium 0.984 (95%CI, 0.976 - 0.992). Sensitivities were: nevus 0.643, limbal dermoid 0.993, MALT lymphoma 0.550, OSSN 0.681, melanoma 0.357, pinguecula 0.793, and pterygium 0.991. Specificities were: nevus 0.996, limbal dermoid 0.993, MALT lymphoma 0.995, OSSN 0.990, melanoma 0.995, pinguecula 0.997, and pterygium 0.898.

The deep learning model demonstrated high diagnostic accuracy for common ocular surface tumors such as pterygium and limbal dermoid, while diagnostic performance for rare malignancies, including melanoma and MALT lymphoma, remains limited and requires further refinement.

We developed a deep learning model that demonstrated promising performance in identifying ocular surface neoplastic diseases, suggesting its potential as a supportive diagnostic tool in ophthalmic practice.