Cutaneous larva migrans is a common infestation among travelers. Although the diagnosis may be suspected clinically, cases can show atypical presentations. We present the ultrasound features of 4 cases at 18 and 70 MHz. Small linear hyperechoic and hyper-refringent subepidermal and intrafollicular structures suggestive of fragments of larvae, hypoechoic dermal and hypodermal tunnels that match with dilatation of lymphatic ducts, and inflammatory dermal and hypodermal ultrasound signs can support the diagnosis. This work suggests that larvae can penetrate the cutaneous basement membrane through the ostia of the hair follicles and potentially disseminate through the dermal and hypodermal lymphatic network.
Autoimmune progesterone dermatitis is an uncommon, poorly recognized and
under-diagnosed catamenial dermatosis associated with hypersensitivity reactions
to progestagens. Most cases manifest as urticaria, eczema or erythema
multiforme-like. A 26-year-old woman developed violaceous plaques on the groin
and abdomen, 4 days after a spontaneous abortion resolved with uterine
curettage. The lesions recurred once monthly at the same sites, mimicking a
fixed drug eruption. Although the histopathology was compatible with fixed drug
eruption, positive intradermal testing and symptomatic improvement after using
oral contraceptive pills gave us a clue to the diagnosis.
Cutaneous metastases from parotid tumors are uncommon and imply a poor prognosis. In this article, we report 2 new cutaneous metastasis cases from 2 different parotid malignancies and 42 additional cases from a literature review. Clinical manifestations, localization, and outcomes of skin metastasis from parotid tumors are described. Although infrequent, parotid neoplasms may develop skin metastasis many years after the initial diagnosis, mostly in the head and neck region. Therefore, long-term follow-up and periodic skin examination of these patients is mandatory. Dermatologists and surgeons must have a high index of suspicion when evaluating any skin lesion arising on these patients because cutaneous metastasis from parotid neoplasms generally implies a poor prognosis.
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