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A case of crusted scabies with a bullous pemphigoid-like eruption and nail involvement.

Abstract
We report a case of a 71-year-old man infected at a nursing home who developed a bullous pemphigoid-like eruption with nail involvement. He was diagnosed by his family doctor as suffering from eczema and was treated with topical corticosteroids, then blisters started appearing. He was next diagnosed as suffering from bullous pemphigoid and treated with oral prednisolone, which worsened his condition. He was finally diagnosed as having crusted scabies with bullous pemphigoid-like eruptions and nail involvement at our clinic. He was then prescribed oral ivermectin (two doses of 12 mg ivermectin with a 1-week interval) and topical lindane (1%gamma-BHC in petrolatum) for scabies with 5% salicylic acid in plastibase as an additional treatment for the crusted lesions on his soles. He showed remarkable improvement in 2 weeks, and his nails showed complete recovery after 7 weeks of occlusive dressing treatment with 1%gamma-BHC. One and a half years later, the patient showed no sign of a recurrence of scabies. The histology of a blister taken from this patient was similar to that of bullous pemphigoid. Direct immunofluorescence showed immunoglobulin (Ig)G and C3 deposition at the dermoepidermal junction similar to that of bullous pemphigoid, but indirect immunofluorescence was negative. The bullous symptoms of this patient were considered to be due to the scabies, because the patient recovered completely after receiving treatment for scabies. Indirect immunofluorescent study is important to distinguish between scabies with blister formation and true bullous pemphigoid.
AuthorsEri Nakamura, Hiroko Taniguchi, Noriko Ohtaki
JournalThe Journal of dermatology (J Dermatol) Vol. 33 Issue 3 Pg. 196-201 (Mar 2006) ISSN: 0385-2407 [Print] England
PMID16620226 (Publication Type: Case Reports, Journal Article)
Chemical References
  • Antiparasitic Agents
  • Ivermectin
Topics
  • Aged
  • Antiparasitic Agents (therapeutic use)
  • Humans
  • Ivermectin (therapeutic use)
  • Male
  • Nail Diseases (drug therapy, parasitology, pathology)
  • Pemphigoid, Bullous (drug therapy, parasitology, pathology)
  • Scabies (drug therapy, pathology)

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