A few hours after the second intervention, the patient developed fever (body temperature 38ºC) and significant local edema, with extravasation of serosanguineous secretion (seroma) that infiltrated the subcutaneous cellular tissue and reached the breasts [rbcp.org.br]

One feature is a phenomenon known as pathergy, in which trauma to the skin can cause new eruptions of ulcers in patients with the disease. Types Two variants of the disease exist--the classic/typical and the atypical variants. [woundcarecenters.org]

[…] the skin and subcutaneous tissue, unspecified 2016 2017 2018 2019 Billable/Specific Code suppurative L08.0 Pustular rash L08.0 Pyoderma, pyodermia L08.0 Pyodermatitis L08.0 Rash (toxic) R21 ICD-10-CM Diagnosis Code R21 Rash and other nonspecific skin eruption [icd10data.com]

The eruption initially appears are a pustule which enlarges and ulcerates with ill defined undermined borders that are bluish or violaceous in color. The surrounding skin also becomes edematous. [radiopaedia.org]

Even a needle taking blood may trigger a new PG eruption in a patient with the disease. This is called “pathergy.” Patients who have skin ulcers that are painful, rapidly growing, and hard to heal should see a doctor. [jamanetwork.com]

Vesiculopustular eruption of ulcerative colitis. Arch Dermatol 1983;119: 664-9. [PubMed] [Google Scholar] 7. Callen JP, Woo TY. Vesiculopustular eruption in a patient with ulcerative colitis. Pyoderma gangrenosum. Arch Dermatol 1985;121: 399, 402. [ncbi.nlm.nih.gov]

Chancroid – Usually present around genital skin. Eosinophilic granulomatosis with polyangiitis (Churg-Strauss syndrome) Herpes simplex virus (HSV) – Usually grouped, punched-out erosions. [visualdx.com]

[…] syndrome [19] Sporotrichosis Squamous cell carcinoma Venous insufficiency [18] Verrucous carcinoma Wegener granulomatosis Atypical mycobacterial infections Differential Diagnoses Acute Febrile Neutrophilic Dermatosis (Sweet Syndrome) Aphthous Stomatitis Chancroid [emedicine.medscape.com]