Absolute Rules: Understanding Crusted Scabies

Crusted scabies (also known as Norwegian scabies) is an atypical and extremely contagious, condition, which typically affects patients with a significantly weakened immune system. This severe infestation manifests through hyperkeratotic plaques, covered by yellowish crusts, located on the extremities, trunk, ears, and eyebrows.

Histology of Crusted Scabies

In cases of crusted scabies, a large number of mites lodged within the stratum corneum. stratum corneum. This epidermal layer is noticeably thickened, presenting marked epidermal acanthosis epidermal acanthosis (illustrated in Figures 1 and 2).

Special Studies Required for Crusted Scabies

Generally, this diagnosis does not require the application of specialized complementary studies.

Differential Diagnosis of Crusted Scabies

Unlike conventional scabies, the crusted presentation is characterized by a significantly higher parasitic load, directly associated with severe hyperkeratosis. hyperkeratosis ulceration.