Assuntos
Endometriose/patologia , Ureter/patologia , Feminino , Humanos , Pessoa de Meia-Idade , Pólipos/patologiaAssuntos
Celulose Oxidada/efeitos adversos , Hemostáticos/efeitos adversos , Histiócitos/patologia , Histiocitose/induzido quimicamente , Doenças Peritoneais/induzido quimicamente , Biomarcadores/metabolismo , Carmim/metabolismo , Feminino , Histiocitose/metabolismo , Histiocitose/patologia , Humanos , Pessoa de Meia-Idade , Mucinas/metabolismo , Doenças Peritoneais/metabolismo , Doenças Peritoneais/patologia , Aderências Teciduais/patologia , Resultado do TratamentoAssuntos
Neoplasias do Córtex Suprarrenal/ultraestrutura , Achados Incidentais , Meningioma/ultraestrutura , Neoplasias Primárias Múltiplas/ultraestrutura , Neoplasias do Córtex Suprarrenal/complicações , Idoso , Carcinoma de Células Renais/complicações , Carcinoma de Células Renais/patologia , Cistadenoma Seroso/complicações , Cistadenoma Seroso/patologia , Diabetes Mellitus Tipo 2/complicações , Diagnóstico Diferencial , Feminino , Humanos , Imuno-Histoquímica , Neoplasias Renais/complicações , Neoplasias Renais/patologia , Meningioma/complicações , Microscopia Eletrônica de Transmissão , Neoplasias Primárias Múltiplas/complicações , Neoplasias Ovarianas/complicações , Neoplasias Ovarianas/patologiaRESUMO
Tumoural calcium pyrophosphate dihydrate crystal deposition is a rare manifestation of calcium pyrophosphate deposition disease (CPPD). We present the case of a 75-year-old male with a previously resected rectal adenocarcinoma who developed a 5-cm right-sided mass at the base of his neck. Clinically and radiologically the lesion was suspicious for malignancy, possibly of metastatic origin. A bedside fine needle aspirate was performed and the smears were mildly cellular showing histiocytes with numerous intracellular and extracellular crystals. These colourless crystals were mostly short and rhomboid shaped and demonstrated weakly positive birefringence. A diagnosis of tumoural CPPD was made. This case is only the second in the English literature diagnosed on fine needle aspiration biopsy. Tumoural CPPD is well known to be a clinical, radiological and occasionally pathological mimic of malignancy. Several cases have been reported where unnecessary radical surgery was performed for this condition. Fine needle aspiration biopsy, as in this case, can provide a rapid and accurate diagnosis of CPPD, avoiding the need for invasive procedures. Polarisation microscopy is a vital adjunct to confirm this diagnosis.