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The images show a raised, palpable, purpuric rash on the lower extremities, surrounded by a mild, 1+ non-pitting edema. Several of the lesions are exfoliated with serous discharge. There is no surrounding erythema, fluctuance, or lymphangitis to suggest cellulitis. There was no tenderness to palpation; however, pruritus was exacerbated on palpation.
Physical exam findings revealed vesicular lesions on the lip, hard and soft palates which did not cross the midline. The lesions appeared in the distribution of the maxillary branch (V2) of the trigeminal nerve, consistent with herpes zoster.
An asymmetric pattern of palpable purpura with bullae was noted on bilateral lower extremities with smaller patches on bilateral upper extremities. There was no tenderness or crepitus.
The first photograph demonstrates a dendritic blister (Lichtenburg figure) on the medial aspect of his right foot where the ground current injury entered the patient's foot. Although no data exists regarding the sensitivity or specificity of Lichtenberg figures as skin findings, they are considered pathognomonic for lightning injuries and are not produced by alternating current or industrial electrical injuries. The second photograph demonstrates a 4 x 3 cm area of petechiae where the ground current injury exited the patient.