PMC10352123_01
Clinical presentations: multiple erythematous to brownish spiny keratotic papules on the neck at the initial visit (A and B).
CCID-16-1807-g0001.jpg
PMC10352123_01_CCID-16-1807-g0001.jpg
f0001
Dermatological examination revealed multiple discrete brownish spiny keratotic papules and scaly erythematous papules on the neck (Figure 1A and B).
Histopathology: (A) mild epidermal hyperplasia with focal mound parakeratosis (hematoxylin-eosin, x100). (B) Higher magnification showed parakeratotic corneocytes with retained keratohyalin granules, which were more prominent around the eccrine ostia (hematoxylin-eosin, x400).
CCID-16-1807-g0002.jpg
PMC10352123_01_CCID-16-1807-g0002.jpg
f0002
These features were prominent in the stratum corneum of the eccrine ostia (Figure 2A and B).
Significant improvement of the lesions at the 2-week follow-up visit (A and B).
CCID-16-1807-g0003.jpg
PMC10352123_01_CCID-16-1807-g0003.jpg
f0003
At the 2-week follow-up visit, the lesions significantly improved (Figure 3A and B).