Previously published Photo Quizzes are now featured in a mobile app. Get more information at http:// www.aafp.org/afp/apps. A 14-year-old boy presented with a tender red papule on his finger. He first noticed it two months earlier. It bled several times, especially when rubbed by his baseball mitt. He had no medical problems or allergies, and he was not taking any medications. He had no other s...

BACKGROUND The pathogenesis of acne vulgaris involves several phases including androgen-dependent hyper-seborrhea, colonization by Propionibacterium acnes, and inflammation. Recent investigations have shown that in fact P. acnes provokes the activation of the inflammasome present in macrophages and dendritic cells. This signaling pathway leads to excessive production of interleukin IL-1β, a pro...

PURPOSE To evaluate the efficacy of a 1,064-nm neodymium-doped yttrium aluminium garnet (Nd:YAG) laser using lower than traditional fluences (22-40 J/cm(2)) for treatment of pseudofolliculitis barbae (PFB). METHODS Twenty-two patients with PFB refractory to conservative therapy received five weekly treatments over the anterior neck using a 1,064-nm Nd:YAG laser at 12 J/cm(2). Pulse duration w...

The lobular capillary hemangioma (LCH), also known as pyogenic granuloma, is a benign tumor of the skin or mucosa, etiology still unclear. Clinically, it typically presents red-livid papule with rapid growth and tendency to bleed.

case: A 3.5-year-old girl presented with a 1-year history of a slow growing pigmented lesion on the dorsal aspect of her right foot. Physical examination revealed the presence of a pigmented patch with color distribution from pink to tan to dark brown, relatively well circumscribed and approximately 1.5 × 2cm with irregular borders, and especially a single dark central papule superimposed...

The most common and well known is nevus Sutton or halo nevus first described in medical journals in 1916, where a hypopigmented area develops around a pre-existing melanocytic nevus. Halo nevi undergo specific sequelae: In Stage I the nevus remains brown, in stage II its pigment can disappear leading to a pink-colored papule. In stage III the central papule disappears, leading to a circular are...

A 41-year-old man from the state of Chhattisgarh, India, had a previous history of nasopharyngeal rhinosporidosis for 27 years, for which he had surgical intervention seven times, most recently endoscopically 2 months earlier. For the last 8 months, he had noticed skin lesions on the shoulders and forehead. Of interest was a history of bathing in ponds as a child. Examination revealed a soft, s...

A 25-year-old female patient was admitted to our outpatient clinic with postpartum hoarseness. Punch biopsy specimens obtained from the larynx and sublingual region revealed multi-folded squamous epithelium with a hyperkeratosis pattern and amorphous hyaline material aggregation. This aggregation was also remarkable around the vessels. Histochemical examination showed periodic acid-schiff-posit...