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"pyoderma gangrenosum"

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pyoderma gangrenosum diagnosis wound care avoid debridement guidelines

These photos show multiple inflamed, ulcerated wounds around the ankle. They are concerning for pyoderma gangrenosum (PG), an inflammatory ulcerating skin condition, particularly because of the painful-looking open ulcers, dark-purple/undermined edges, and nearby smaller pustule-like lesions.

However, this cannot be diagnosed reliably from photos. Important alternatives include a bacterial infection such as ecthyma, a venous or arterial ulcer, vasculitis, or another inflammatory skin disease. PG is diagnosed after examination and tests to exclude these causes. The DermNet overview of PG lists many of these mimics.

Please arrange urgent in-person assessment today or within 24 hours, ideally with a dermatologist or wound-care/surgical clinician. They may need wound swabs/cultures, blood tests, circulation assessment, and sometimes an edge biopsy.

Until assessed:

Do not pick, scrub, or attempt aggressive removal of dead tissue.
Avoid non-essential cutting/debridement, since trauma can worsen suspected PG.
Cover gently with a clean non-adherent dressing.
Seek emergency care now for fever, rapidly spreading redness or swelling, severe escalating pain, foul-smelling drainage, blackening skin, or if the person has diabetes/immunosuppression.

A 2024 systematic review on local wound care for PG exists (PMID 39557450), but this needs clinician confirmation first because treating an infection as PG, or vice versa, can be harmful.

This is not seems to be like PG what else could be it .can it be a psoriasis

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psoriasis differential diagnosis lower leg ulceration

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DermNet discoid eczema venous eczema psoriasis clinical features ulcers

Psoriasis is possible but is not the leading appearance here. Classic plaque psoriasis is usually a dry, sharply bordered, thick scaly plaque with silvery-white scale. These lesions look more wet/oozing, eroded, crusted, and ulcerated, with surrounding dark discoloration near the ankles.

More likely possibilities include:

Discoid eczema (nummular dermatitis), possibly secondarily infected
- Can cause round or oval, very itchy, inflamed plaques on the legs that ooze, blister, and crust.
- The smaller nearby spots fit an eczematous eruption. See DermNet’s discoid eczema guide.
Venous eczema / stasis dermatitis with an ulcer
- Particularly likely if there is ankle swelling, varicose veins, past DVT, heaviness of the legs, or longstanding brown skin discoloration around the ankles. Venous disease can cause eczema first and then open ulcers, often near the inner ankle. Venous eczema features.
Allergic or irritant contact dermatitis
- For example, a reaction to a dressing, adhesive, topical antibiotic, antiseptic, or herbal preparation. This can be very weepy and may spread beyond the original wound.
Infected eczema, impetigo/ecthyma, or an infected leg ulcer
- Needs a swab if there is increasing pain, warmth, pus, yellow crust, odor, or spreading redness.
Less commonly, fungal infection, vasculitis, or PG. PG remains a differential only if the ulcers are extremely painful and rapidly enlarge after minor trauma, but I agree the photos are not a textbook classic PG pattern.

A dermatologist or wound-care clinician should examine this soon. Useful checks are a wound swab, assessment for venous insufficiency and arterial circulation, and possibly a skin scraping for fungus. Avoid starting potent steroid cream alone before infection and fungal disease are considered. Also avoid aggressive scraping or home debridement.

Seek urgent care today if redness is spreading, the area is hot/swollen, fever occurs, pain increases quickly, pus/foul odor develops, or the person has diabetes or poor circulation.

Patient had this on hs both elbows,rim and behind the ear,and around ankle and foot

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"plaque psoriasis" AND diagnosis

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psoriasis clinical features extensor elbows behind ears scalp plaque diagnosis DermNet

That distribution makes chronic plaque psoriasis much more likely.

Psoriasis commonly affects:

Both elbows, usually symmetrically
Scalp and behind the ears
Ankles and feet
Sometimes nails, with pitting, lifting, thickening, or yellow-brown “oil drop” patches

This pattern is much more characteristic of psoriasis than pyoderma gangrenosum or a purely venous ulcer. The ankle lesions in the photos may represent severely inflamed, scratched, fissured, or secondarily infected psoriatic plaques, which can become wet and eroded rather than showing the classic dry silver scale. The clinical distribution of plaque psoriasis includes elbows, scalp, ear areas, and feet.

Still, the open/weeping areas need examination because psoriasis can coexist with:

Secondary bacterial infection
Eczema/contact dermatitis from topical products or dressings
Less often, fungal infection

A dermatologist can usually confirm with examination, and may do a skin scraping or culture. A biopsy may be appropriate if the lesions remain atypical.

Ask specifically about:

Nail pitting or nail separation
Scalp scaling
Pain/swelling in fingers, toes, heels, knees, or back stiffness, which can suggest psoriatic arthritis
Family history of psoriasis
Recent sore throat, infections, new medicines, or steroid withdrawal

Do not use strong topical steroids on suspected infected open wounds without clinician review. Prompt review is particularly important if there is pus, fever, spreading warmth/redness, rapidly worsening pain, or diabetes.

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