A 15-year-old boy presented to outpatient dermatology clinic for evaluation of a lesion on the hand. Originally small and asymptomatic, the lesion had rapidly enlarged in the six months prior to evaluation. A shave biopsy was performed and histopathologic evaluation demonstrated a well-circumscribed nodular proliferation of dense, bland, epithelioid to spindle cells on a fibrillary background. Tumor cells were diffusely epithelial membrane antigen (EMA) positive; S100 and Melan-A were negative. These findings are consistent with a diagnosis of sclerosing perineurioma. This case illustrates the presentation of sclerosing perineurioma in a pediatric patient and we review the pertinent pathologic and immunohistochemical findings necessary for diagnosis. It is imperative to distinguish this entity from other soft tissue tumors on the hand, both benign and malignant, to avoid overly aggressive surgical intervention.

Actinomycosis is a rare, chronic bacterial infection caused by Actinomcyes israelii. This anaerobic filamentous gram-positive bacterium frequently colonizes the human mouth, digestive, and genital tracts. Cervicofacial actinomycosis infections have a proclivity for affecting the upper and lower mandibles and occur in 50% of cases. Most cases present in immunocompetent individuals and almost always involve some degree of pre-existing mucosal trauma through either recent dental procedures or poor dental hygiene. Herein, we present a 54-year-old man diagnosed with cervicofacial actinomyces infection in the absence of periodontal disease or recent dental procedures. The purpose of this testimony is to discuss the pathogenesis and clinical and histologic findings of actinomycosis. In addition, we review diagnostic techniques and the current breadth of treatment options. It is our hope that this manuscript will serve as a guide for physicians of all specialties in accurately recognizing and promptly treating actinomycosis.

There is growing evidence to support new modes of transmission for human monkeypox infection. As these methods are being explored, this report delineates the day-to-day clinical sequelae following the initial exposure in an HIV-positive man who had sexual intercourse with another man days preceding his infection. We describe atypical cutaneous manifestations involving widespread erythematous pustules with preceding anogenital ulcerations and concomitant bilateral inguinal lymphadenopathy. Clinicopathologic correlation is used to assist in the workup and establishing the diagnosis. Our case supports others reported in the literature that suggest sexual contact as a means of transmission. More research is needed that investigates the presence of infection in both men and women, including those who could act as carriers, to elucidate other pathways in this evolving yet evasive viral disease.