Crusted or Norwegian scabies is a parasitic infectious disease caused by
Sarcoptes scabiei var. hominis that mainly affects
immunocompromised individuals and those with neurological patients. We report a
case of crusted scabies in a 4-month-old infant who had been treated erroneously
for atopic dermatitis with high doses of corticosteroids. This initial
misdiagnosis associated with the abusive use of corticosteroid facilitated the
evolution of scabies to crusted scabies and its main complications of secondary
infection and sepsis.
Although subungual squamous cell carcinoma is rare, it is the most common primary
malignant neoplasms in this location. The higher incidence occurs in the
fingernails, but involvement of the toenails is also possible. Subungual
squamous cell carcinoma often looks like other more common benign lesions, such
as fungal infection, onychomycosis, or viral wart. These factors, together with
a general lack of awareness of this disease among physicians, often result in
delayed diagnosis. Therefore, it is underdiagnosed, with few reports in the
literature. The authors present a case of a man with a diagnosis of subungual
squamous cell carcinoma in the hallux, without bone involvement, which was
submitted to the appropriate surgical treatment.
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