Abstract: Demodex folliculorum and Demodex brevis are obligatory ectoparasites of the pilosebaceous unit in humans. Although most people are infested with these mites, only a small number develop clinical symptoms of demodicidosis. We report a case of demodicidosis in a 6-year-old boy who had lesions on the scalp, forehead, neck, and anterior chest for 18 months. Our clinical diagnosis at the time was favus. The microscopic examination of the hair in a 10% potassium hydroxide preparation showed no fungal spores or hyphae, but many eggs and adult mites of D folliculorum. The patient was treated with oral ivermectin and topical permethrin, and the lesions resolved completely. Demodicidosis is a rare disease that can clinically mimic favus and other crusted scalp dermatoses in children.
Scabies of the Scalp Mimicking Seborrheic Dermatitis in Immunocompromised Patients
Abstract: Two children with acute tymphoblastic leukemia undergoing chemotherapy had a special form of scabies characterized by fine scaling of the scalp simulating seborrheic dermatitis. Pruritus was mild or absent, immunocompromised children and adults should receive whole-body and scalp antiscabietic treatment.
Division of Pediatric Surgery, White Plains Hospital Center, White Plains, NY, USA.
Human botfly larva in a child's scalp.
Abstract: The botfly is the name for several families of hairy flies the larvae of which live as parasites in the bodies of mammals. Reported are the presentation, diagnosis, and noninvasive therapy for a botfly larva in the scalp of a 14 year old.
University of Pittsburgh Medical Center, Department of Dermatology, Pennsylvania 15213, USA.
Resistant scalp folliculitis secondary to Demodex infestation.
Abstract: Folliculitis is a common complaint and its etiology may be related to a variety of factors. We examine a case involving a 57-year-old white man presenting with scalp erythema and folliculitis secondary to Demodex mite infestation. We discuss the pathophysiology of Demodex folliculitis, as well as the epidemiology, clinical manifestation, diagnosis, and treatment of this infection.