Retiform purpura is the result of total vascular blockage and damage to the skin's blood vessels. The skin then shows lesions, appearing due to intravascular issues where clots, proteins, or emboli block skin vessels. They can also result from direct harm to the vessel walls, as seen in conditions like vasculitis, calciphylaxis, and certain severe opportunistic infections.
| Retiform purpura | |
|---|---|
| Specialty | Dermatology |
| Symptoms | persistent dark red to dark purple hemorrhagic skin patches or plaques |
| Causes | vessel wall damage (vasculitis/depositional disease/angioinvasion by organism) or vessel lumen occlusion (thrombotic or embolic disease)[1] |
| Treatment | Underlying cause and would care including circulatory support |
Pathophysiology
editRetiform purpura is a cutaneous morphology characterized by a branching (reticular), non-blanching (purpuric) patch, plaque, or lesion that develops when blood vessels supplying the skin become obstructed.[2][3] This blockage leads to downstream cutaneous ischemia, or insufficient blood supply to the skin, causing purpura, necrosis, and potentially ulceration.[3] The obstruction in the dermal and subcutaneous vasculature results in hemorrhage secondary to skin ischemia, which can further lead to skin necrosis and ulceration.[2][3][4] This morphology can occur in a variety of disorders.[5]
Signs and symptoms
editRetiform purpura can present as non-raised large patches of purpura, with angulated or net-like border. They can present as painful dark red or purple patches or plaques with bordering branching and central purpura, necrosis, and/or ulceration. They can vary in size from small (1–2 cm) to large (>10 cm), and may be single or multiple, localized or disseminated. The branching may only be seen at the edge of one or two lesions but is still the clue to this diagnosis and a potentially serious underlying condition.[2] Inflammatory retiform purpura consists of redness around the lesion with associated central necrosis caused by vasculitic or infectious processes. Noninflammatory retiform purpura refers to lesions with central necrosis with surrounding redness caused by the occlusive process. There can be significant overlap between these two classifications. Pain within lesions is common and may be severe.[citation needed]
Associated disorders
editThere are several vasculopathy disorders that can present with retiform purpura.[3] Some thrombotic and coagulopathic disorders are disseminated intravascular coagulation (DIC),[6] hypercoagulable states (like antiphospholipid antibodies), thrombotic thrombocytopenic purpura (TTP), warfarin-induced skin necrosis, heparin-induced thrombocytopenia, and paroxysmal nocturnal hemoglobinuria. Some intravascular protein deposition diseases causing retiform purpura are cryoglobulinemia (type I), cryofibrinogenemia, and paraproteinemia. Some embolic disorders that may lead to retiform purpura include cholesterol emboli, septic emboli, atrial myxoma, or other manifestations like nonbacterial thrombotic endocarditis (marantic endocarditis, Libman-Sacks endocarditis) and hypereosinophilic syndrome. Some vessel wall pathology resulting in retiform purpura could be vasculitis, septic vasculitis, vasculitis related to autoimmune disease or primary systemic vasculitis, or cryoglobulinemic vasculitis (cryoglobulinemia types 2 and 3).[3]
Other manifestation of retiform purpura can be seen in opportunistic infections, calciphylaxis, primary hyperoxaluria, livedoid vasculopathy, pyoderma gangrenosum, and vasculopathy or vasculitis due to levamisole-contaminated cocaine.[4]
The onset of widespread purpura, known as purpura fulminans, is a dangerous condition associated with disseminated intravascular coagulation (DIC). Determining the root cause of DIC is crucial for treatment. In severe opportunistic infections, retiform purpura can also emerge. It is vital to quickly assess patients showing signs of purpura fulminans, especially if they exhibit symptoms of sepsis, serious sickness, or have weakened immune systems.[6]
Patient assessment and management
editA detailed history and physical examination are essential for patients with retiform purpura, as they can offer significant insights for diagnosis. Specifically, evaluating the skin's color and the spread of purpura is crucial. Skin biopsies of retiform purpura can be instrumental in diagnosing suspected retiform purpura, specifically a punch or an excisional wedge biopsy. If infection is suspected, a tissue culture with initial lab workup.[citation needed]
Because the disease manifests in several ways, it is crucial to obtain the underlying etiology when determining treatment plans.[citation needed]
References
edit- ^ Georgesen, Corey; Fox, Lindy P.; Harp, Joanna (April 2020). "Retiform purpura: A diagnostic approach". Journal of the American Academy of Dermatology. 82 (4): 783–796. doi:10.1016/j.jaad.2019.07.112. PMID 31479689. S2CID 201831828.
- ^ a b c Jones, Leah (November 2020). "Retiform Purpura". DermNet. Retrieved 25 October 2023.
- ^ a b c d e Georgesen, C; Fox, LP; Harp, J (April 2020). "Retiform purpura: A diagnostic approach". Journal of the American Academy of Dermatology. 82 (4): 783–796. doi:10.1016/j.jaad.2019.07.112. PMID 31479689. S2CID 201831828. Retrieved 25 October 2023.
- ^ a b Wysong, A; Venkatesan, P (March 2011). "An approach to the patient with retiform purpura". Dermatologic Therapy. 24 (2): 151–172. doi:10.1111/j.1529-8019.2011.01392.x. PMID 21410606. S2CID 10099582. Retrieved 25 October 2023 – via Wiley.
- ^ Tan, Cheng; Jing, Hong-Mei; Zhang, Li-Tao; Ma, Dong-Lai; Zhang, Ru-zhi (2018), Zhu, Wen-Yuan; Tan, Cheng; Zhang, Ru-zhi (eds.), "Cutaneous Vascular Diseases", Atlas of Skin Disorders: Challenging Presentations of Common to Rare Conditions, Singapore: Springer, pp. 189–196, doi:10.1007/978-981-10-8037-1_14, ISBN 978-981-10-8037-1, retrieved 28 January 2024
- ^ a b Levi, Marcel (January 2004). "Current understanding of disseminated intravascular coagulation". British Journal of Haematology. 124 (5): 567–576. doi:10.1046/j.1365-2141.2003.04790.x. PMID 14871243. S2CID 12700686. Retrieved 25 October 2023 – via Wiley.
