title: Subungual pigmented squamous cell carcinoma presenting as a grey longitudinal melanonychia in a young patient.
authors.affiliation: Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran, Tlalpan, Mexico.
authors.forename: Michelle
authors.initials: M
authors.lastname: Gatica-Torres
authors.affiliation: Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran, Tlalpan, Mexico.
authors.forename: Lilia
authors.initials: L
authors.lastname: Arguello-Guerra
authors.affiliation: Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran, Tlalpan, Mexico.
authors.forename: Juan
authors.initials: J
authors.lastname: Manuel Ruiz-Matta
authors.affiliation: Department of Dermatology, Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran, Tlalpan, Mexico.
authors.forename: Judith
authors.initials: J
authors.lastname: Dominguez-Cherit
mesh_terms: D002294:Carcinoma, Squamous Cell / Q000175:diagnosis* / Q000473:pathology; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D009260:Nail Diseases / Q000175:diagnosis* / Q000473:pathology; D012307:Risk Factors; D012878:Skin Neoplasms / Q000175:diagnosis* / Q000473:pathology; D055815:Young Adult