Lymphomatoid Papulosis (LyP) is a rare skin disorder characterized by chronic, recurrent papules and nodules that heal spontaneously. This report discusses an 8-year-old Filipino female with a three-month history of erythematous pruritic papules evolving into plaques. A skin biopsy confirmed CD30-negative LyP, and treatment with Methotrexate resulted in significant improvement of the lesions. This case illustrates the complex diagnostic and therapeutic journey of LyP in children, emphasizing the importance of careful clinicopathologic correlation and the challenges of management due to the lack of curative therapy and the risk of malignant transformation.

Primary cutaneous anaplastic large cell lymphoma (C-ALCL) is a rare subtype of primary cutaneous lymphoma with a favorable prognosis. Primary cutaneous CD30+ lymphoproliferative disorders, which include C-ALCL and lymphomatoid papulosis, are the second most common group of cutaneous T-cell lymphomas. C-ALCL is comprised of large cells with anaplastic, pleomorphic, or immunoblastic cytomorphology, and indeed, more than 75% of the tumor cells express the CD30 antigen. C-ALCL clinically presents with solitary or localized reddish-brown nodules or tumors, and sometimes indurated papules, and they may be with ulceration covering with dark eschar. Multifocal lesions are seen in 20% of the patients. Extracutaneous dissemination, which mainly involves the regional lymph nodes, occurs in 10% of patients. A 69-year-old man noticed a mild elevated cutaneous lesion containing central ulceration covering with brownish black necrotic tissue on the right lower lip, and the lesion was surgically removed. After the first operation, another skin lesion was developed and the histological examination confirmed the diagnosis, C-ALCL. Eight specimens were excised during the 7-month follow-up period. The patient started the treatment with low-dose oral methotrexate (15 mg/wk) and there was no recurrence for 11 months.
Aged ; Antigens, CD30 ; Diagnosis ; Follow-Up Studies ; Humans ; Lip ; Lymph Nodes ; Lymphoma ; Lymphoma, Primary Cutaneous Anaplastic Large Cell ; Lymphoma, T-Cell, Cutaneous ; Lymphomatoid Papulosis ; Lymphoproliferative Disorders ; Methotrexate ; Prognosis ; Recurrence ; Skin ; Ulcer

No abstract available.
Lymphomatoid Papulosis*

CD30+ lymphoproliferative disorders (LPD) represent a spectrum of T-cell lymphoma including lymphomatoid papulosis and anaplastic large cell lymphoma (ALCL). Epidermis overlying cutaneous CD30+ LPD often shows epidermal hyperplasia, hyperkeratosis, crusting, and ulceration and it is difficult to distinguish from carcinoma such as keratoacanthoma (KA) or squamous cell carcinoma (SCC). Several cases of pseudocarcinomatous hyperplasia mimicking KA or SCC in CD30+ LPD have been reported. The relationship between CD30+ LPD and epithelial proliferations has not yet well understood. It was reported that a variety of mediators, including epidermal growth factor (EGF), transforming growth factor-α and EGFR from CD30+ LPD could attribute to epidermal hyperplasia. However, separate and distinct SCC occurring in CD30+ LPD has rarely been reported. Herein, we present a rare case of coexistence of SCC and cutaneous ALCL located on the same region.
Carcinoma, Squamous Cell* ; Epidermal Growth Factor ; Epidermis ; Epithelial Cells* ; Hyperplasia ; Keratoacanthoma ; Lymphoma ; Lymphoma, Large-Cell, Anaplastic ; Lymphoma, Primary Cutaneous Anaplastic Large Cell* ; Lymphoma, T-Cell ; Lymphomatoid Papulosis ; Lymphoproliferative Disorders ; Ulcer

No abstract available.
Lymphomatoid Papulosis* ; Mycobacterium* ; Tuberculosis*

No abstract available.
Lymphomatoid Papulosis* ; Mycobacterium* ; Tuberculosis*

Patients with lymphomatoid papulosis have an increased risk (approx. 5% to 20%) of developing a malignant lymphoma such as mycosis fungoides, anaplastic large cell lymphoma (ALCL) and Hodgkin's disease before, during, or after lymphomatoid papulosis occurs. However, it is very rare that lymphomatoid papulosis occurs after ALCL, especially in childhood. An 11-year-old boy who had been diagnosed with ALCL 3 years prior and treated with chemotherapy and peripheral blood stem cell transplantation developed multiple scaly papules on his trunk and both extremities. Histopathologic and immunohistochemical examination of the scaly papules revealed lymphomatoid papulosis. The patient was cured with narrow band UVB treatment and there has been no relapse in lesions 10 years later. We report a case of lymphomatoid papulosis following allogenic stem cell transplantation for ALCL.
Child* ; Drug Therapy ; Extremities ; Hodgkin Disease ; Humans ; Lymphoma ; Lymphoma, Large-Cell, Anaplastic* ; Lymphomatoid Papulosis* ; Male ; Mycosis Fungoides ; Peripheral Blood Stem Cell Transplantation ; Recurrence ; Stem Cell Transplantation

Genes, T-Cell Receptor gamma ; Humans ; Lymphomatoid Papulosis ; classification ; diagnosis ; Skin Neoplasms ; classification ; diagnosis

No abstract available.
Lymphomatoid Papulosis* ; Pregnancy*

Patients with lymphomatoid papulosis have other lymphomas in 10~20% of cases, most commonly mycosis fungoides, Hodgkin's disease, and anaplastic large cell lymphoma. In a series involving at least 40 patients with lymphomatoid papulosis, the association of lymphomatoid papulosis with mycosis fungoides ranged from approximately 7% to 18%. It is most important to distinguish lymphomatoid papulosis from CD30-positive large cell transformation of mycosis fungoides. Both conditions can be distinguished on clinical grounds, and clinical course is often the only distinguishing feature. We report a case of lymphomatoid papulosis developing in an mycosis fungoides lesion in a patient who received 3 rounds of narrow band UVB phototherapy and topical corticosteroid application.
Hodgkin Disease ; Humans ; Lymphoma ; Lymphoma, Large-Cell, Anaplastic ; Lymphomatoid Papulosis* ; Mycosis Fungoides* ; Phototherapy*