Flat warts, also called Verruca plana, are flesh-coloured or reddish eruptions, with raised flat surfaces and are painless in nature. A closer inspection will reveal that the flat surface is actually rough in nature (hence called verrucous). As opposed to the eruptions of Molluscum, flat warts do not show a dimpled surface.
Lichen Planus is a skin disease known to occur from autoimmune causes. The lesions vary from being linear to ring-like, plaque-like, fluid-filled, hyperpigmented and even white and popular. This disease can occur not only on the skin, but also on various mucous membranes of the body like mouth, stomach, anus, nose, bladder, conjunctiva and genitals.
Dermatitis herpetiformis is a chronic skin condition involving a pattern of symmetrically arranged blisters on the skin filled with a watery liquid. The eruptions are intensely itchy with a burning sensation and may be accompanied by signs of digestive disturbance like bloating, abdominal pain and loose stools.
Basal Cell Carcinoma
Basal cell carcinoma is the commonest skin cancer in the world. It is a slow-growing type of cancer that tends to occur on those parts of the skin which are regularly exposed to sunlight or other ultraviolet radiation. The lesions may differ and appear either pearly white, light pink and waxy or even hyperpigmented. These lesions invariably lack a tendency to heal on their own, and may even change in appearance to become sore, ulcerative or scar-like, with oozing and bleeding.
Keratoacanthoma is a low-grade skin tumour known to originate from the neck of the hair follicle. It is known to be a variant of squamous cell carcinoma. The tumour con sists of lesions that are symmetrical and dome-shaped, surrounded by debris and scales of keratin and has a tendency to grow rapidly, necrose due to lack of nourishment and heal by scarring.
Cryptococcosis is an infection occurring primarily in the lungs, caused by a fungus, Cryptococcus neoformans. It can also manifest on the skin in 10-15% cases. The lesions consist of umbilicated papules seen mostly on the head and neck. These painless papules may enlarge into nodules and ulcerate. Along with these eruptions, the patient will also complain of fever, chest pain and cough. The condition is seen most commonly in cases of compromised immunity, including HIV positive patients.
Milia are tiny cysts present on the skin that are filled with keratin. Each milium measures 1-2 mm in diameter and appear pearly white or yellowish. They typically occur after long-term sun damage, prolonged use of steroids, burns, blistering injuries, etc. The milia are not usually painful or itchy, but may give rise to discomfort.