Plastic Surgery Key

Pediculosis pubis (pubic lice infestation) is a commonly acquired sexually transmitted disease. The pubic louse, Phthirus pubis, is structurally different from the body or head louse and can easily be…

Pathogenesis: P. humanus capitis affects humans and has a high propensity to infest the scalp. These lice live on the host and periodically take a blood meal from the scalp…

A Tzanck preparation is a long-used bedside procedure that takes only a few minutes to perform and is positive in cases of HSV1, HSV2, or varicella-zoster virus (VZV) infection. The…

Alternatively, after it enters the cell’s nucleus, the virus may become latent. This is particularly the case in neural tissue. The viral DNA inserts itself into the host DNA, where…

Herpes labialis is the term given to recurrent episodes of oral labial herpes. The episodes are milder than the primary infection and often start with a prodrome. Most patients complain…

A kerion is a boggy plaque found on occasion in tinea capitis that results from a massive immune inflammatory response to the causative fungal agent. The fungi most likely to…

Histology: The histopathology is nonspecific unless the actual larva is biopsied. This is highly unlikely, because the larva is typically an estimated 2 to 3 cm ahead of the leading…

Histology: Punch biopsy or excisional biopsy specimens show a diffuse granulomatous inflammatory infiltrate. Pseudocarcinomatous epithelial hyperplasia often overlies the granulomatous infiltrate. Within the granulomatous portion of the dermal infiltrate are…

Pathogenesis: Pemphigus vulgaris is a chronic autoimmune blistering disease in which autoantibodies are directed against the desmosomal plaque. The desmosomal plaque is the most crucial element that holds adjacent keratinocytes…

Anaerobic culture of the purulent material or a portion of the tissue is critical for proper identification of the responsible organism and ultimately for choosing the appropriate therapy. Material should…