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Imiquimod cream is an immunomodulatory agent that has been approved by the US Food and Drug Administration for use in the treatment of anogenital warts (condylomata acuminata) due to its local immune effects in activating Toll-like receptors 7 and 8 on antigen-presenting cells, resulting in reduction of the viral load of human papillomavirus with subsequent wart regression. After its application, some side effects are commonly reported, including erythema, edema, scaling, erosion, and ulceration. While pigmentary changes, including vitiligo-like depigmentation, have been mentioned as a possible side effect, they have rarely been reported in the literature. Alterations in pigmentation occur because imiquimod application causes human melanocyte apoptosis and autodestruction resulting in loss of melanocytes. Herein, we report the rare case of a 34-year-old healthy male who developed vitiligo-like depigmentation following imiquimod application for his genital warts. This case report aims to increase physicians' awareness of this possible side effect that could be irreversible and difficult for the patient to accept.We report the case of an otherwise healthy 17-year-old female who presented for surgical removal of an enlarging "atypical cyst" on her scalp. During subtotal excision, only friable serosanguinous translucent ribbons of tissue were found. A histopathologic diagnosis of Langerhans cell histiocytosis (LCH) was rendered and imaging studies revealed extradural invasion of the tumor. Within weeks, the patient also developed progressive lymphadenopathy with grossly elevated levels of Epstein-Barr virus viral capsid antigen antibody levels. This report aims to highlight a unique presentation of LCH with discussion of workup, management, and avoidance of potential surgical complications.We report on a 39-year-old man who presented with seven skin lesions on the right thigh 3 weeks after receiving a large tattoo which included red and black pigments. Initially, the lesions grew fast, later their growth stabilized. Histopathology showed well-circumscribed symmetric tumors with a central keratin-filled crater along with further trademarks of a keratoacanthoma. The patient had previously had multiple tattoos with no history of similar lesions. PCR analysis of one of the lesions revealed the presence of human papillomavirus 6. All lesions were excised with a safety margin. A 3-month follow-up revealed no further lesions.We report a case of pruritic urticarial papules and plaques of pregnancy (PUPPP) starting with target lesions on both forearms at the end of second pregnancy. The patient's target lesions became generalized itchy edematous eczema lesions especially on her abdomen extended by pregnancy, which immediately disappeared postpartum. The mechanism PUPPP has not been elucidated so far; however, the typical target lesion was the initial phenotype in the current case. To approach the pathophysiology of PUPPP, we examined the cytokine profile in the patient's serum before and after delivery. The upregulated Th2 cytokine profile including IL-9 and IL-33, and the reaction against skin-resident bacteria and fungus might be involved in PUPPP.Febrile ulceronecrotic Mucha-Habermann disease (FUMHD) is a rare and severe variant of pityriasis lichenoides et varioliformis acuta (PLEVA) characterized by intermittent pyrexia, acute onset of generalized ulceronecrotic lesions, and histopathology suggestive of PLEVA. Prompt diagnosis and treatment are necessary to halt the progression of this potentially fatal disease; however, the widely variable presentation of FUMHD in addition to its rarity poses a diagnostic challenge. We report the case of a previously healthy 43-year-old woman who presented to the emergency department with 1 month of generalized rash and intermittent fevers. Her only reported new exposure were elective intravenous vitamin infusions received at a medi-spa 1 week prior to onset of lesions. Initial evaluations were inconclusive, and confluent ulceronecrotic, hemorrhagic lesions appeared on approximately 90% of her body despite steroid, antibiotic, and cyclosporine therapy. Repeat histopathology was consistent with PLEVA, and in the context of her clinical presentation she was diagnosed with FUMHD. The patient rapidly attained remission with methotrexate therapy but sustained residual scarring.Mycosis fungoides (MF) is defined as an epidermotropic primary cutaneous T-cell lymphoma composed of small-to-medium-sized T lymphocytes with cerebriform nuclei and with a T-helper phenotype. LeBoit first described an unusual variant of MF with dermal acid mucin deposition. Such a variant was still considered in the list of clinicopathological variants of MF by Cerroni and colleagues. We herein report a case of patch-stage MF with abundant papillary dermal mucin deposition in a clinical setting of an erythematous patch on the lower abdomen and thigh.Intralymphatic histiocytosis (ILH) is a rare cutaneous condition initially described in 1994 by O'Grady et al. It often appears as a red to violaceous, livedoid patch or plaque usually on the extremities. We present a 71-year-old female with a history of psoriasis, 50 pack years smoking and recent Legionnaires disease who came to us complaining of a red to violaceous, blanching, edematous, mildly tender lesion covering the left lower lip and extending to the chin and anterior neck. After multiple biopsies, ILH was confirmed and the patient was initially started on tacrolimus 0.1% ointment b.i.d., but there was no response. Then, she was started on oral pentoxifylline and intermittent topical steroids, as well as continuing the topical tacrolimus. There was again no response, so now she is taking a TNF-ɑ inhibitor as it appears to be a granulomatous process. https://www.selleckchem.com/products/lw-6.html These ILH cases are very rare and there is limited literature that describes one treatment as a cure. Treatment of ILH is very difficult, but several different therapies have been reported with varying success. If the disease is secondary to an underlying inflammatory disease or malignancy, then treatment of the primary disorder can lead to resolution of the ILH.
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