Blastic plasmacytoid dendritic cell neoplasm: a rare external ear lesion presenting with leukaemia.
Khan, Hamad Dad Kakar, Sahil McClelland, Lisha Hussein, Hayder
Khan, Hamad Dad
Kakar, Sahil
McClelland, Lisha
Hussein, Hayder
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University Hospitals Birmingham NHS Foundation Trust
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Publication date
2024-09-20
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Abstract
Blastic plasmacytoid dendritic cell neoplasm (BPDCN) is a rare and aggressive haematological malignancy, typically characterised by cutaneous lesions and bone marrow involvement. We present a unique case of a woman in her 70s, initially seen for a spontaneous swelling on her left external ear resembling a haematoma, which recurred after initial treatment, triggering further evaluation.Diagnostic challenges arose as the patient displayed positive markers for Myeloperoxidase (MPO) (p-ANCA), suggesting vasculitis. Dermatology considered various differential diagnoses, but imaging and tests ruled out significant pathology. Steroid treatment led to improvement, but coincided with a surge in white cell count (WCC), prompting an urgent haematological review.Subsequent investigations, including a punch biopsy of the external ear and a bone marrow biopsy revealed BPDCN concurrent with chronic myelomonocytic leukaemia. This case highlights the challenging diagnostic journey, emphasising the need for multidisciplinary collaboration and the potential for unique BPDCN presentations, expanding our understanding of this malignancy.
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Khan HD, Kakar S, McClelland L, Hussein H. Blastic plasmacytoid dendritic cell neoplasm: a rare external ear lesion presenting with leukaemia. BMJ Case Rep. 2024 Sep 20;17(9):e260059. doi: 10.1136/bcr-2024-260059.
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