Pityriasis Rosea Unilateralis

Segmental pityriasis rosea within the area of BRAF‐mutated metastatic melanoma

“…PR variants include a non-papulosquamous morphology such as papular, vesicular, purpuric and targetoid lesions, presenting without a herald patch, 1 scalp and facial involvement in children, 2 involvement confined to the extremities and segmental eruptions have all been reported. 3,4 In our case, the new onset of skin eruption was localized to an area of previous malignant melanoma recurrence. The localization of this eruption could represent a distinct atypical presentation of PR or possibly a modified presentation secondary to an immune dysregulation from lymphadenectomy or vemurafenib.…”

Unilateral pityriasis rosea in a child: A rare clinical presentation

“…To the best of our knowledge, only seven cases with unilateral PR were reported previously 4,[8][9][10][11][12][13] . Six of the reported cases were adults, in four of them lesions were located on the trunk, in two of them were located on the lower extremity 4,[8][9][10][11][12] . Only one child with unilateral involvement was reported and the lesion of this case was located on the extremity 13 .…”

Unilateral pityriasis rosea in a child

“…3,10 Unilateral presentation of PR is rare and has been reported earlier in adult patients. 11,12 It is equally rare to find unilateral eruptions of PR in children. Careful history, clinical evaluation and follow up are important to avoid misdiagnosis of PR.…”