HNRNPD and squamous cell carcinoma: The p40 and hnRNPD showed equal sensitivity (80.95%) for squamous cell carcinoma, whereas hnRNPD emerged as marginally more specific than p40 with 88.23% specificity and 89.47% positive predictive value in comparison to p40 with 85.29% specificity and 87.17% positive predictive value (Table 5).