Asymptomatic CD34+ plaque on the scalp of a child.

Fibroblastic connective tissue nevus (FCTN) is a rare, benign dermal mesenchymal lesion of fibroblastic and myofibroblastic lineage. We report a case of a 2-year-old male who presented with an 18-month history of an erythematous, asymptomatic, unchanging dermal plaque on the right medial frontal scalp. A punch biopsy showed a disorderly, bland, dermal fibroblastic spindle cell proliferation extending to the superficial subcutis. It stained positive for CD34, and concern for dermatofibrosarcoma protuberans was raised. However, FISH was negative for PDGFB rearrangement, and the constellation of findings was most consistent with FCTN. This case underscores the importance of distinguishing CD34+ mesenchymal tumors for both dermatologists and dermatopathologists. As these represent a rather diverse group of lesions with different biological behaviors, a knowledge of the differential diagnosis of these entities is critical for proper patient management.

A Case Report of Tumor Necrosis Factor Alpha Inhibitors in an Active Duty Service Member with Dissecting Cellulitis of the Scalp Resistant to Treatment.

Dissecting cellulitis of the scalp represents a disease of follicular occlusion that may be worsened by tight-fitting clothing, such as the patrol cap or advanced combat helmet used by military service members. Treatment poses a challenge to the clinician, and the treatment of choice, oral retinoids, may not improve the condition sufficiently to maintain active duty status. Early treatment augmentation with tumor necrosis factor-alpha inhibitors may improve efficacy of oral retinoids and prevent medical separation of the active duty service member.