• Hot tub folliculitis
    Dermatology,  Internal Medicine

    Hot Tub Folliculitis

    This an infection of the hair follicles caused by Pseudomonas aeruginosa. There is often a history of emersion in hot tubs, whirlpools or other sources of contaminated water. The rash that occurs is often worse if the skin is occluded by a bathing suit. The rash can present anywhere from a few hours to days after exposure, and consists of itchy red bumps and may progress to tender nodules filled with pus. Hot tub folliculitis is self-resolving within 5 to 10 days but may leave a reddish-brown or hyperpigmented area that can take a few months to disappear. To help with the rash, white vinegar can be applied for 20…

  • cylindroma
    Dermatology,  Internal Medicine


    Cylindromas are smooth, round benign tumors of eccrine sweat glands that are most often found on the scalp. They often occur in clusters and may be compared to a bunch of grapes. In rare cases, the tumors coalesce and form one large tumor that covers the entire scalp. This is called a “turban tumor.” Hereditary cylindromas are often multiple and are inherited in an autosomal dominant manner. Sample Cases A 45 year old man presents with two small, round, 1 cm masses on his scalp. They have grown larger over the last 6 months. On exam, the masses are solid and move under the skin of the scalp. The overlying…