Pulmonary and intracerebral plasmacytomas in a patient without multiple myeloma: a case report

Intracerebral Plasmacytoma in a Patient with HIV-1 Infection and SARS-CoV-2 Superinfection

We present a rare case of intracranial solitary plasmacytoma arising in brain parenchyma in the basal nuclei. Clinical management and autopsy results of the case are described. Background: Intracranial plasmacytomas arising from brain parenchyma are extremely rare, and data from the literature are limited. Primary intracranial plasmacytomas are rare because plasma cells are not found in the brain in normal conditions. Commonly, intracranial plasmacytoma is associated with multiple myeloma, which is why multiple myeloma must be ruled out to diagnose solitary intracranial plasmacytoma. Considering that solitary plasmacytoma and multiple myeloma have some histopathological similarities, it is important to differentiate them because their respective treatments and prognoses are different. Imaging features of primary extramedullary plasmacytoma are nonspecific but are compatible with solid tumors with invariable enhancement. Plasmacytoma was aggressive because it was not diagnosed after the first MRI, but 1.5 months later, MRI showed a large object. We present a rare case of intracranial solitary plasmacytoma arising in brain parenchyma in the basal nuclei.

Extramedullary Pulmonary Plasmacytoma in a Dog

In this case report we are presenting a rare case of primary pulmonary plasmacytoma in a dog in the context of clinical and pathological findings. A six-years-old, female Rottweiler was brought to the clinic with respiratory complaints. The patient was dyspneic and tachypneic, and there were friction sounds on auscultation of the lungs. Laryngeal and tracheal palpation induced severe cough. Lateral and ventrodorsal radiographs of the thorax showed increased opacity in the lungs and loss of cardiac silhouette. Based on clinical and radiological findings, diagnosis of a lung mass was made and surgery recommended. Under general anesthesia, bilobectomy of the right lung lobes by medial sternotomy was performed. Upon cytological and histopathological findings, plasmacytoma was diagnosed.

Sudden and unexpected death due to intracranial sellar extramedullary plasmacytoma

The incidence of sudden death caused by undiagnosed primary intracranial neoplasm in young adults is extremely low. The aim of the work is to present a case report of the sudden death of a 24-year-old woman. The autopsy has revealed enlargement of sella turcica with an intrasellar tumorous mass extending into the adjacent basal parts of the brain. A tumour was diagnosed as an extramedullary plasmacytoma. The cause of death was established as a failure of the central nervous system. Toxicological analyses of biological materials were negative. According to the case history, a woman reportedly had no serious health problems. Finding of an extensive intracranial tumour in the sella turcica was random and surprising. The presented case is an extremely rare case of sudden death caused by intracranial intrasellar extramedullary plasmacytoma without previous clinical manifestation.

[Three cases of primary pulmonary plasmacytoma]

Extramedullary plasmacytoma is a plasma cell malignancy that most commonly occurs in the upper respiratory tract. Plasmocytoma located in the lung is an unusual finding, and in such cases the disease may be confined to the lung and regional lymph nodes or may be disseminated. When only located in the lower respiratory tract (primary pulmonary plasmacytoma), diagnosis is difficult and is usually based on the excised tissue. We present 3 cases, 2 of which were particularly unusual in that diagnosis was confirmed by bronchial biopsy. Other important findings included the detection of paraprotein in the blood and urine of 2 of the patients, and follow-ups over 10 and 15 years without recurrence of the disease in 2 of the cases.

A rare case of solitary plasmacytoma mimicking a primary lung tumor

Extramedullary plasmacytomas, especially located in the thorax, are very rare. We present a 31-year-old patient who was diagnosed with a solitary plasmacytoma located in the lung mimicking a primary lung tumor. After several weeks, this developed into multiple myeloma.

Dural plasmacytoma mimicking meningioma in a young patient with multiple myeloma

Intracranial involvement in multiple myeloma (MM) is rarely found, especially with dural involvement. There are only a few cases found concerning MM with intracranial involvement. MM usually involves an older group of patients. Cases involving young patients are very rare. The differential diagnosis of a dural plasmacytoma includes meningioma, metastasis, lymphoma and sarcoma of the dura mater. We present a young patient, 33 years old, with MM presenting an intracerebral mass mimicking meningioma on MRI. MM was diagnosed the previous year. The patient presented with headache, balance disturbance and back pain. MRI revealed an occipital extra-axial mass with a dural tail. Histopathological examination after excision showed MM. Published literatures on intracranial involvement of MM are also discussed. Plasmacytoma should be considered in the differential diagnosis of a solitary dural mass, particularly in a patient with MM.

Dural plasmacytoma mimicking meningioma in a patient with multiple myeloma

Apart from calvarial infiltration, intracranial involvement in multiple myeloma is uncommon. Diffuse leptomeningeal invasion with or without parenchymal involvement is most common. Dural infiltration without involvement of the parenchyma, leptomeninges or skull is rare. The differential diagnosis of a dural plasmacytoma includes meningioma, which has a similar MRI appearance, metastasis, lymphoma and sarcoma of the dura mater. We present a patient with multiple myeloma presenting with an intracerebral mass mimicking a meningioma on MRI. Multiple myeloma had been diagnosed seven years previously. The patient presented with headache and speech disturbance 12 months after autologous peripheral stem cell transplantation for recurrence of multiple myeloma. MRI revealed a left temporal extra-axial mass with a dural tail mimicking meningioma. Histopathological examination of the mass after excision showed multiple myeloma immunopositive for IgG, kappa light chain and CD38. There was no recurrence after postoperative radiotherapy. Plasmacytoma should be considered in the differential diagnosis of a solitary dural mass, particularly in a patient with multiple myeloma.