A scutulum is a yellow, perifollicular, saucerlike or cup-shaped crust with a cheesy odor, composed of dense mats of mycelia and epithelial debris. Scutula often occur on the scalp and are characteristic of

favus Favus (Latin for "honeycomb") or tinea favosa is the severe form of tinea capitis, a skin infectious disease caused by the dermatophyte fungus '' Trichophyton schoenleinii.'' Typically the species affects the scalp, but occasionally occurs as o ...

Morphology

* Consists of a crust-like yellow lesion (sulphur cap) * Has a concave-convex surface with its convexity to the

scalp The scalp is the anatomical area bordered by the human face at the front, and by the neck at the sides and back. Structure The scalp is usually described as having five layers, which can conveniently be remembered as a mnemonic: * S: The s ...

making for itself an

erosion Erosion is the action of surface processes (such as water flow or wind) that removes soil, rock, or dissolved material from one location on the Earth's crust, and then transports it to another location where it is deposited. Erosion is di ...

or depression of

epidermis The epidermis is the outermost of the three layers that comprise the skin, the inner layers being the dermis and Subcutaneous tissue, hypodermis. The epidermis layer provides a barrier to infection from environmental pathogens and regulates the ...

, so it is firmly adherent to the scalp * Upon detachment it gives a serosangiunous discharge (serum and blood) * size : from a few millimetres to a few centimetres

References

Dermatologic terminology {{dermatology-stub