A 73-year-old woman presented with drooping of her right upper lid. Twelve years prior she had undergone resection of neuroendocrine tumor in the upper lobe of her right lung and a metastasis to the ninth thoracic vertebra, which was treated with EBRT. Subsequent 5-HIAA study and Indium-111 OctreoScan were within normal limits.\nVisual acuity was 20/20 OD and 20/40 OS. There was 1 mm proptosis and 3 mm blepharoptosis on the right side. MRI of the orbit revealed a heterogeneous lesion with contrast enhancement in the superior right orbit measuring 13 × 18 × 14 mm and a smaller lesion adjacent to the lacrimal gland []. Fine needle aspiration biopsy of the orbital tumor was consistent with neuroendocrine tumor with positive staining for chromogranin, AE1/AE3, synaptophysin, and CD56 but negative staining for CD45 consistent with atypical carcinoid. Excisional biopsy revealed a low-grade non-small cell neuroendocrine tumor. Residual orbital tumor was treated with EBRT. Within the next 2–6 years, she developed recurrent lesions in both lungs and multiple metastatic lesions in the thoracic vertebra, breast, scalp, and cavernous sinus which were treated with a combination of surgical excision, chemotherapy (carboplatin, etoposide, and paclitaxel), and EBRT. Six years after initial presentation, the patient was alive with no orbital tumor recurrence [].
A 45-year-old female patient presented with weight loss, mild proptosis, and decreased vision in both the eyes. She was evaluated to have multiple lymphnodes and biopsy from mediastinal lymphnode showed metastatic neuroendocrine tumour. She was referred for whole body Ga-68 DOTANOC PET/CT for detection of primary site. Whole body PET/CT showed an intense uptake in the left lung nodule, mediastinal, and retroperitoneal lymph nodes and also uptake in the EOM lesions (arrows) []. A diagnosis of primary carcinoid lung with nodal and extrocular muscle metastasis was made and she was treated with Lu-177 DOTATATE (7.4GBq). Whole body Lu-177 images [] showed intense uptake in lymphnodes and bilateral EOM metastasis (arrows). Symptomatically, she had improvement with weight gain and normal vision in both eyes on clinical examination.