Upon assessment of an elderly patient, the nurse who finds scaly plaques on the patient's knees knows that this indicates which of the following systemic diseases?
A) Syphilis
B) Café-au-lait spot
C) Psoriasis
D) Kaposi's sarcoma
Ans: C
Feedback: Psoriasis consists of plaques with scales and may be seen on the front of the knees. Syphilis manifests as a painless chancre or ulcerated lesion. Refer to Table 55-1. A café-au-lait spot is macular and tan in color. Kaposi's sarcoma is a cutaneous lesion that is blue-red or dark brown in color.
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