case_images: PMC11622799_01
case_images: Active chronic colitis with cryptitis.
case_images: IFSO_A_2432240_F0001_C.jpg
case_images: PMC11622799_01_IFSO_A_2432240_F0001_C.jpg
case_images: F0001
case_images: Histopathology confirmed the diagnosis of left-sided ulcerative colitis (Figure 1).
case_images: Confluent erythematous-violaceous and pigmented plaques are present on the face.
case_images: IFSO_A_2432240_F0002_C.jpg
case_images: PMC11622799_01_IFSO_A_2432240_F0002_C.jpg
case_images: F0002
case_images: In 2016, the patient presented with an erythematous eruption on the forehead and the wrists, which exacerbated and progressively extended to the arms, forearms, neck and upper back (Figures 2-4) (a graph with timeline of UC diagnosis, treatment initiation and lichen planus development is represented is Annex).
case_images: Confluent erythematous-violaceous and pigmented plaques are present on the forearms and wrists.
case_images: IFSO_A_2432240_F0003_C.jpg
case_images: PMC11622799_01_IFSO_A_2432240_F0003_C.jpg
case_images: F0003
case_images: In 2016, the patient presented with an erythematous eruption on the forehead and the wrists, which exacerbated and progressively extended to the arms, forearms, neck and upper back (Figures 2-4) (a graph with timeline of UC diagnosis, treatment initiation and lichen planus development is represented is Annex).
case_images: Confluent erythematous-violaceous and pigmented plaques are present on the upper neck.
case_images: IFSO_A_2432240_F0004_C.jpg
case_images: PMC11622799_01_IFSO_A_2432240_F0004_C.jpg
case_images: F0004
case_images: In 2016, the patient presented with an erythematous eruption on the forehead and the wrists, which exacerbated and progressively extended to the arms, forearms, neck and upper back (Figures 2-4) (a graph with timeline of UC diagnosis, treatment initiation and lichen planus development is represented is Annex).
case_images: Lichen planus: lymphocytic and melanophagic infiltration in the dermis, hyperkeratotic epidermis.
case_images: IFSO_A_2432240_F0005_C.jpg
case_images: PMC11622799_01_IFSO_A_2432240_F0005_C.jpg
case_images: F0005
case_images: These histological findings were consistent with the diagnosis of LP (Figure 5).