A case of non-Hodgkin’s lymphoma of the ovary: Usefulness of18F-FDG PET for staging and assessment of the therapeutic response

Unusual Presence of Synchronous Primary Ovarian and Thyroid Extranodal Non-Hodgkin Lymphoma Without Lymph Node Involvement

ABSTRACT

Extranodal lymphomas without lymph node involvement are rarely observed and create diagnostic challenges. We present the case of a 33-year-old woman who was admitted with abdominal swelling. Ultrasonography findings suggested bilateral ovarian masses. 18 F-FDG PET/CT revealed intense uptake on the bilateral pelvic mass and thyroid gland. Following excisional surgery and thyroid fine-needle aspiration biopsy, the patient was diagnosed with diffuse large B-cell lymphoma. This case is exceptionally rare, as it presents 2 synchronous extranodal involvements in the ovaries and the thyroid gland independently while not presenting any lymph node activity, which has not been reported before.

Imaging of ovarian lymphoma

OBJECTIVE

The aim of the study is to describe the radiological spectrum of appearances of ovarian lymphoma (OL). The manuscript describes the radiological aspects of OL to assist the radiologist in achieving correct orientation of the diagnosis.

METHODS

We conducted a retrospective evaluation of imaging studies of 98 cases of non-Hodgkin's lymphoma, with extra-nodal localisation (ovaries) in three cases (1 primary, 2 secondary). A literature review was also performed.

RESULTS

Of the three evaluated women, one had a primary ovarian involvement and two had a secondary ovarian involvement. The most common lesion characteristics were a well-defined, solid homogeneous and hypoechoic mass at US. CT depicts OL as a well-defined, non-infiltrating, homogeneous hypodense solid mass, with mild contrast enhancement. On T1-weight MRI, OL appears as a homogeneous mass of low signal intensity, which enhances avidly following intravenous gadolinium.

CONCLUSION

Clinical and serological presentation of OL can be similar to that of primary ovarian cancer. As imaging plays a central role in the diagnosis of OL, the radiologist should be familiar with US, CT and MRI appearances of this condition to correctly orient the diagnosis and so avoid unnecessary adnexectomy.

Torquated large ovarian lymphoma as a cause of acute abdomen: a case report of diffuse large B-cell ovarian lymphoma with a germinal center B-cell-like phenotype

BACKGROUND

Ovarian lymphoma is a rare neoplasm and most commonly represents secondary ovarian involvement in overt systemic disease, usually of the non-Hodgkin's type.

AIM

To report a case of acute abdomen caused by torquated large ovarian lymphoma.

CASE REPORT

We report the case of 65-year-old patient admitted to our hospital with signs and symptoms of acute abdomen. Findings were suggestive of left ovary torsion due to the neoplasm. After detorsion, mobilization, and adhesiolysis, a bilateral adnexectomy was performed. Histopathological and immunohistochemical analysis of the left ovarian tumor was performed and diagnosis of diffuse large B‑cell lymphoma (DLBCL) with a GCB (germinal center B‑cell-like) phenotype was made. Additional bone marrow biopsy and imaging techniques excluded other sites of involvement, confirming diagnosis of primary ovarian DLBCL.

CONCLUSION

The prognosis of ovarian lymphomas may be poorer than for other lymphomas because of late diagnosis. The best treatment option appears to be systemic chemotherapy.

Solitary Lip Extranodal Natural Killer/T-Cell Lymphoma on FDG PET/CT

A 54-year-old man presented with a history of upper lip pain for 4 weeks. Biopsy of the lip lesion revealed extranodal natural killer/T-cell lymphoma. F-FDG PET/CT scan showed the solely high uptake in the right upper lip without any other nodal or extranodal involvements.

Primary lymphomas of the intraabdominal solid organs and the gastrointestinal tract: spectrum of imaging findings with histopathological confirmation

Unlike nodal lymphoma, primary lymphomas of the intraabdominal organs are uncommon neoplasms whose diagnosis may be challenging in certain clinical circumstances. Despite this difficulty for imaging diagnosis, there are several imaging features on ultrasonography, computed tomography, magnetic resonance imaging, and positron emission tomography that may suggest the correct diagnosis. The scope of this review is to describe and illustrate the imaging features of primary lymphoma of intraabdominal organs providing clues to the diagnosis, together with their pathological correlations.

Primary T-cell Lymphoblastic Lymphoma of the Ovary: A Case Report

Primary ovarian lymphoma is extremely rare. We report a case of primary T-cell lymphoblastic lymphoma of the ovary in a 31-year-old multiparous woman, who presented with abdominal pain. Her menstrual cycles were regular. There was no generalized lymphadenopathy or fever. On per abdominal examination, there was a firm, tender, solid, mobile mass with well-defined borders, corresponding to 20 weeks gestation, whose lower pole was easily reached. Per vaginum examination revealed a large adnexal mass in the right and anterior fornix. Transabdominal ultrasonography showed bilateral solid ovarian tumor measuring 13.9 cm × 11.8 cm on the right side and 10.0 cm × 6.3 cm on the left side with significant vascularity. Tumor markers were within normal limit except for significantly elevated serum lactate dehydrogenase. Magnetic resonance imaging showed two large solid homogeneous masses, hypointense on T1W1 and hyperintense on T2W1 imaging, with a normal sized uterus and no ascites or lymphadenopathy. The patient developed one episode of left hemiparesis preoperatively, which improved spontaneously. Staging laparotomy with total abdominal hysterectomy and bilateral salpingo-oophorectomy along with infracolic omentectomy was done. Histopathology with immunohistochemistry revealed primary T-cell lymphoblastic lymphoma of the ovary, involving both ovaries left fallopian tube and left serosal surface of fundal region of uterus. She developed generalized convulsions on the 12^th postoperative day, and final diagnosis was primary ovarian T-cell lymphoblastic lymphoma Ann Arbor Stage IV. She received three cycles of chemotherapy with cyclophosphamide, doxorubicin, vincristine, and prednisolone regimen and was on palliative care. She succumbed to her illness 5½ months postoperatively.

Primary Non-Hodgkin's Lymphoma of the Ovary - A Case Report

The ovarian lymphoma is rare. Lymphoma presenting as an ovarian mass with initial manifestation is even rarer. We report a case of primary Non-Hodgkin's Lymphoma (NHL) of left ovary in a 52-year-old female presented with distension of abdomen and lower abdominal back pain. USG and CT-scan imaging suggested provisional diagnosis of ovarian tumour. The diagnosis of malignant lymphoma was made by histopathological examination of the excised tissue along with immunohistochemistry by using LCA, CD20, cytokeratin & CD3. The tumour was classified as diffuse large B cell lymphoma. Rarity of this lesion warrants its mention.

Non-Hodgkin lymphoma dominated by multiple organ extranodal disease revealed on FDG PET/CT

The definition of primary extranodal lymphoma is rather controversial and often complicated by the variety of lymphoma types. Here we describe FDG PET/CT findings in 3 pediatric patients with diffuse large B-cell non-Hodgkin lymphomas dominated by extranodal lesions involving multiple organs. Lymphomas arising primarily in extranodal sites can present significant diagnostic challenges due to their morphological diversity and lack of uniformity in histopathological classification.

Diffuse Large B-Cell Lymphoma Infiltrating Limb Bones With a Few Lymphadenopathy Revealed on Whole-Body 18F-FDG PET/CT

A 74-year-old man presented to our hospital for a 2-month history of worsening feet and left hand swelling pain. Computed tomography reconstruction image and sagittal images of the left foot demonstrated multiple and irregular bone destruction. Orthopedic surgeon suspected tuberculosis or primary skeletal malignancy. ¹⁸F-FDG PET/CT revealed bone destruction and abnormal activity mainly in bones of both upper and lower extremities and a few lymphadenopathy at the region of left axilla and groin. Diagnosis of diffuse large B-cell lymphoma was eventually made. Subsequently, the patient was transferred to the department of oncology and responded well to antilymphoma therapy.

A case of primary ovarian lymphoma with autoimmune hemolytic anemia achieving complete response with Rituximab-based combination chemotherapy

Ovarian involvement as primary or secondary lymphomatous process is extremely uncommon. In most cases, the diagnosis is usually not suspected initially and is confirmed only after detailed histopathological evaluation. We report a patient with primary ovarian diffuse large B-cell lymphoma (DLBCL) and associated auto-immune hemolytic anemia (AIHA) who achieved complete remission after treatment with Rituximab-cyclophosphamide-doxorubicin-vincristine and prednisolone (R-CHOP) chemotherapy. This patient was a 50 year old female, who presented with fever, abdominal pain, vomiting, weight loss and anemia. Computed tomography scan of the abdomen and pelvis revealed a large left ovarian mass with bilateral hydronephrosis. We performed exploratory laparotomy and partial resection of the mass was done due to the adhesions. Histopathology confirmed the diagnosis of DLBCL. After six R-CHOP chemotherapy cycles, patient achieved complete response with correction of anemia. To our knowledge, this may be the first case report till date of primary ovarian DLBCL with AIHA treated with R-CHOP chemotherapy who achieved complete remission in terms of primary disease as well as hemolytic anemia.

Bilateral Tubo-Ovarian Abscess Mimics Ovarian Cancer on MRI and (18)F-FDG PET/CT

A 20-year-old woman, who presented with a several-week history of abdominal pain, was referred for magnetic resonance imaging (MRI) and (18)F-fluorodeoxyglucose (FDG) positron emission tomography (PET)/computed tomography (CT) after an ultrasound showed complex cystic masses arising from both ovaries. The MRI and (18)F-FDG PET/CT imaging characteristics of the ovarian masses were strongly suspicious for malignancy, and the masses were surgically removed. Histopathological evaluation revealed a bilateral tubo-ovarian abscess, with no evidence of malignancy. This case highlights a potentially serious pitfall in the evaluation of suspicious pelvic masses by (18)F-FDG PET/CT, whereby a complex bilateral tubo-ovarian abscess may mimic the PET/CT imaging characteristics of an ovarian or pelvic malignancy.

Non-Hodgkin's lymphoma of the bone and the liver without lymphadenopathy revealed on FDG-PET/CT

Primary extranodal lymphomas are much less frequent than nodal lymphomas. Osseous and hepatic lymphomas commonly present with additional nodal lesions. Primary lymphoma of the bone or of the liver without nodal disease is uncommon. We describe a case of extranodal non-Hodgkin's lymphoma with numerous osseous and hepatic lesions without any lymph node involvement on FDG-PET/CT images. This is the first report of the coexistence of both osseous and hepatic lymphoma in the same patient without any lymph node involvement.