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This case is reported because of the unusual clinical presentation and to highlight the spectrum of atypical hidradenitis suppurativa.We report a 6-year-old girl showing epidermolytic ichthyosis/epidermolytic hyperkeratosis (EI/EH). Targeted Next Generation Sequencing revealed a de novo, previously unidentified KRT1 mutation. The findings of this study expands the clinical and spectrum and genotype-phenotype correlation associated with EI/EH.Poorly controlled and long-standing hidradenitis suppurativa (HS) increases the risk of squamous cell carcinoma (SCC). We report a 54-year-old woman with an over 20-year history of HS, who had previously undergone wide perineal excision with secondary intention healing and presented with a painful verrucous vulvar plaque and proximal non-healing perineal wound. The patient had four perineal scouting biopsies performed and excisional biopsy with no evidence of high-grade dysplasia or carcinoma on histology. Chromogenic in situ hybridization was negative for HPV 16 and 18 mRNA; the patient's HIV and HSV PCR were also negative. Our patient was treated with interferon alfa-2b with notable clinical improvement. There is currently no standardized stepwise approach to monitoring verrucous lesions in HS patients with significant risk factors for SCC. Our report highlights a vigilant approach to monitoring. If scouting biopsies are negative, complete testing for high risk HPV strains (HPV 16 and 18) is warranted. If negative, we recommend follow up every 6 months with no further biopsies except if overt clinical changes are observed. We also recommend treatment of verrucous changes to decrease risk of possible malignant conversion. Interferon alfa-2b was effective in decreasing the verrucous lesion burden in our patient and may be considered.Hyaluronic acid injection to rejuvenate or to correct defects is a very common practice in aesthetic medicine. Although it is considered highly safe because of biocompatibility and biodegradability, adverse reactions can occur. Herein, we report a patient with foreign body granuloma formation that presented as multiple subcutaneous nodules on both arms, following injections of hyaluronic acid performed about six years earlier. Our case is unique with respect to timing and area of granuloma appearance.Nail-patella syndrome (NPS) is a hereditary disorder characterized by fingernail changes, elbow dysplasia, hypoplastic patellae, and presence of iliac horns. Clinical presentation can be subtle, and the spectrum of presentation often makes NPS a challenging diagnosis. Herein, we describe three family members with nail-patella syndrome who presented with different features and varying severity. The opportunity to recognize this rare syndrome in three linear generations provided a unique insight into NPS, and a moment to appreciate the random and unpredictable clinical presentation.A 40-year-old woman presented with painful ulcerations on the bilateral lower extremities. A biopsy confirmed the diagnosis of livedoid vasculopathy (LV). https://www.selleckchem.com/products/bmh-21.html She was treated initially with aspirin and pentoxifylline, and with the addition of dipyridamole she has had no recurrence of her ulcerations to date. Despite this positive response to treatment she reported numbness and paresthesias in her legs. Nerve conduction studies confirmed a diagnosis of mononeuritis multiplex. This case highlights mononeuritis multiplex as a rarely described complication of LV, and suggests that early recognition of symptoms and a multidisciplinary approach are necessary for optimal management of this condition.We present a patient with erythrodermic Darier disease occurring in temporal association with diagnosis of metastatic lung adenocarcinoma. The patient presented with eroded and crusted keratotic papules and plaques over greater than 90% body surface area with extensive secondary impetiginization. Given a longstanding history of pruritic eruption, this presentation represents a paraneoplastic flare of an underlying genodermatosis. Near total resolution was achieved with chemotherapy and topical corticosteroids.Terbinafine is an antifungal agent used in the treatment of hair, nail, and skin dermatophyte infections. Skin side effects to terbinafine are not common. Lichenoid drug eruption is a medication-related adverse cutaneous event; the lesion morphology and pathology mimic lichen planus. A woman with onychomycosis developed a lichenoid drug eruption one week after starting terbinafine. The features of her dermatosis and the characteristics of two additional men who also experienced terbinafine-induced lichenoid drug eruption are discussed. They were receiving a daily terbinafine dosage of either 125mg or 250mg to treat onychomycosis or tinea cruris. The lichenoid drug eruption presented as diffuse or symmetric lesions within one to two weeks after starting terbinafine treatment. The extremities, chest, abdomen, and/or trunk were common sites. Less frequent locations were the lips, nails, palms, soles, and suprapubic region; lesions did not occur on the oral or genital mucosa. The eruption resolved after discontinuation of the medication (with or without treatment using topical corticosteroids, systemic corticosteroids, or both). In addition, more frequently occurring terbinafine-associated cutaneous adverse events (such as urticaria, erythematous eruptions, pruritus, acute generalized exanthematous pustulosis, subacute cutaneous lupus erythematosus, and papulosquamous conditions) are reviewed.Psoriasis is a common autoimmune dermatosis representing an interplay between certain genetic predisposing factors along with clonally restricted Th1 T cells responding to epidermal keratinocyte derived antigen. A unique IL17/IL23 cytokine-rich milieu is pathogenetically significant and conducive to its salient histomorphologic features, such as epidermal hyperplasia and intraepidermal influx of neutrophils. The classic cutaneous manifestation is that of plaque psoriasis also referred to as psoriasis vulgaris with characteristic well-circumscribed erythematous plaques covered by silvery scales. Follicular psoriasis is an uncommon variant manifesting as a scaly folliculocentric hyperkeratotic eruption of the trunk and extremities, irrespective of the presence or absence of conventional lesions of psoriasis vulgaris. In this study we present 5 cases of follicular psoriasis, review the literature, and provide a proposal regarding relevant pathologic findings and potential pathogenetic mechanisms. The incidence of follicular psoriasis is unknown, emphasizing its rarity given the overall incidence of conventional psoriasis in the general population.
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