pseudolymphoma


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pseu·do·lym·pho·ma

(sū'dō-lim-fō'mă),
A benign infiltration of lymphoid cells or histiocytes that microscopically resembles a malignant lymphoma.

pseudolymphoma

[-limfō′mə]
a benign disorder of lymphoid cells or histiocytes that produces clinical features of a malignant lymphoma.

pseudolymphoma

A form of lymphoid hyperplasia, which is characterised by relatively monotonous infiltrates of lymphocytes, and may be seen in breast, gastrointestinal tract, lung, mediastinum, orbit, salivary gland, skin, soft tissue, thyroid, etc. Pseudolymphomas occur in a younger population, and have been associated with collagen diseases, systemic lupus erythematosus, Sjögren syndrome, phenytoin therapy. They may present in those with concomitant lymphoma or in those who later develop lymphoma.

pseudolymphoma

A form of lymphoid hyperplasia, characterized by relatively monotonous infiltrates of lymphocytes, seen in breast, GI tract, lung, mediastinum, orbit, salivary gland, skin, soft tissue, thyroid, etc; pseudolymphomas occur in a younger population, have been associated with collagen diseases, SLE, Sjögren syndrome, phenytoin therapy, and may present in those with concomitant lymphoma or in those who later develop lymphoma. See Phenytoin lymphadenopathy. Cf Lymphoma.

pseu·do·lym·pho·ma

(sū'dō-lim-fō'mă)
A benign infiltration of lymphoid cells or histiocytes that microscopically resembles a malignant lymphoma.

pseudolymphoma

lesions likely to be mistaken for lymphoma include nodular lymphocytic-plasmacytic lesions of panniculitis, vasculitis, perifolliculitis, nodules created by vaccinations, arthropod stings.
References in periodicals archive ?
TABLE Differential diagnosis for dermatomally distributed nodules (4) Neoplasms Benign Syringocystadenoma papilliferum, trichoepithelioma, cutaneous schwannoma Malignant Basal cell carcinoma, cutaneous metastases, lymphoma, plasmacytoma, squamous cell carcinoma Other mucocutaneous Granuloma annulare, neurofibromatosis type 1, conditions pseudolymphoma, rheumatoid nodules, sarcoidosis, xanthomas Adapted with permission from: Hager CM, Cohen PR, Tschen JA.
Drug-induced pseudolymphoma and drug hypersensitivity syndrome (drug rash with eosinophilia and systemic symptoms: DRESS).
Because of its varied presentation, the differential diagnosis for MPCM includes cafe au lait macules, lentigines, nevi, lichen planus, pseudolymphoma, diffuse juvenile xanthogranuloma, and Langerhans cell histiocytosis.
The common subsequent conditions are many like granuloma annulare, sarcoid, metastasis, lymphoma, leukemia cutis, pseudolymphoma, tinea, angiosarcoma, Bowen's disease and tuberculoid and vasculitic granuloma.
Localized cutaneous pseudolymphoma associated with phenytoin therapy: a case report.
Case of immunoglobulin G4-related skin disease: Possible immunoglobulin G4-related skin disease cases in cutaneous pseudolymphoma only by immunohistochemical analysis.
These may be associated with allergic contact dermatitis, lichenoid dermatitis, and pseudolymphoma (3).
Cutaneous pseudolymphoma in a juvenile blue and gold macaw (Ara ararauna).
6) The presence or absence of multiple sites of involvement, antecedent history, peripheral blood involvement, tempo and pattern of progression (aggressive or chronic), and association with other local or systemic diseases (contact dermatitides or autoimmune disease such as lupus) are important considerations not only for the diagnosis but also to distinguish the lesion from pseudolymphoma (reactive lymphoid proliferations that very closely mimic lymphoma).
Cutaneous pseudolymphoma at the site of prior herpes zoster eruption.
Meanwhile, diseases such as lymphoma or pseudolymphoma of the skin, histocytic variants of malignant fibrohistiocytoma or manifestations of systemic lymphoma should be ruled out at the time of diagnosis.
skin papules [Kluger, Muller, & Gral, 2008; Lubeck & Epstein, 1952], malignant melanoma [Kircik, Armus, & Vandenbroek, 1993; Kirsch, 1969], and pseudolymphoma [Kahofer, El Shabrawi-Caelen, Horn, Kern, & Smolle, 2003]).