A Pigmented Subcutaneous Nodule on the Scalp.

A 52-year-old man presented to his primary doctor with a slow-growing cystic lesion on his occipital scalp. His primary care doctor diagnosed the lesion as a pilar cyst and recommended observation because the lesion was asymptomatic at that time. The patient had no significant medical or surgical history.

Seasonal variations in dermatologic and dermatopathologic diagnoses: a retrospective 15-year analysis of dermatopathologic data.

Background: Certain dermatologic conditions are known to show seasonal variations in frequency, the reasons for which are unclear but in some cases may be attributable to changes in ambient weather conditions.

Objectives: The current study was conducted to determine whether seasonal trends might exist for dermatologic conditions including erythema multiforme, guttate psoriasis, erythema dyschromicum perstans (ashy dermatosis), pityriasis lichenoides, and pityriasis rosea.

Methods: Data were derived from a 15-year retrospective review of electronic records from a large dermatopathology laboratory located in the mid-Atlantic region of the USA.

Telangiectasia macularis eruptiva persians presenting as island sparing.

Mastocytosis is characterized by the proliferation and accumulation of mast cells within organs and most commonly the skin; localization accounting for the frequent presentation of skin lesions in affected individuals. The authors detail a case report involving a patient with telangiectasia macularis eruptive perstans, a rare cutaneous form of mastocytosis, accompanied by an unusual clinical finding of island sparing.

Dermatologic presentations of orthopedic pathologies: a review of diagnosis and treatment.

Dermatologic presentations of orthopedic diseases are commonly encountered in the dermatology clinic. These disorders often necessitate prompt recognition in order to properly refer for definitive treatment as well as to avoid unnecessary diagnostic procedures. As such, the presentations of these diseases as well as the treatments available deserve special attention.