​Dermatology - Ulcer

​Dermatology - Ulcer 
The term "ulcer" is derived from the Latin word for sore. An ulcer is a skin lesion that penetrates into the dermis or subcutis.
Ulcers are invariably a consequence of pathologically modified tissue.
Ulcers can exhibit raised, eroded, indurated, or macerated margins.
 Ulcers can exude or exhibit purulent discharge.
The pathologically modified tissue that leads to an ulcer is typically observed at the edge or the foundation of the ulcer, and it aids in identifying the underlying cause of the ulcer. The identification of any accompanying topographic characteristics, such as nodules, excoriations, varicosities, hair distribution, perspiration, and arterial pulses, can aid in determining the underlying etiology. Ulcers invariably undergo scar development during the healing process.