Pigmented Fungiform Papillae (PFP) of the Tongue: A Systematic Review of Current Aetiopathogenesis and Pathophysiology Solitary pigmentation of the tongue: lentigo simplex or pigmented fungiform papilla? Oral pigmentation in children: a diagnostic challenge Archives of Disease in Childhood Cutaneous adverse drug reaction image Differential Diagnosis of Pigmented Lesions in the Oral Mucosa: A Clinical Based Overview and Narrative Review A 9 year old boy presented for evaluation of dark spots on the tongue. The family first noted these spots 5 months prior and reported that they remained stable. Can you make a diagnosis?