A 3-year-old child has numerous small, white scales covering the extensor surfaces of the extremities, trunk, and face (shown in the image). The child’s mother and grandmother have the same condition. Biopsy of lesional skin shows hyperkeratosis and a thin stratum granulosum. Which of the following is the most likely diagnosis?
- Acute eczematous dermatitis
- Bullous pemphigoid
- Epidermolysis bullosa
- Ichthyosis vulgaris
- Pemphigus vulgaris