Abstract
Anaplastic large cell lymphoma (ALCL) represents an aggressive CD30 - positive T cell lymphoma, as it is the second most common T cell lymphoma and 2% to 5% of all non - Hodgkin lymphomas. The cutaneous involvement can be primary or secondary within systemic ALCL, resembling inflammatory and other neoplastic lesions both clinically and cytologically. Various pigmented cutaneous tumours with a different origin, cutaneous metastasis and B-cell lymphoma must be carefully considered in the differential diagnostic plan. While simple surgical excision is usually curative, with good prognosis, systemic involvement must also be excluded. We present a case of a patient, with clinically unspecific single violet nodular lesion, as the only clinical manifestation of ALCL. The diagnosis was confirmed histologically, as the surgical excision was enough therapeutic management, regarding the early disease stage. Further following up with the patient is mandatory, because of the high recurrence rate. We want to emphasise the diversity of clinical manifestation of ALCL, regarding the importance of its early diagnosis and treatment.