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Patient underwent resection for adenocarcinoma of the rectum. Path final diagnosis stated: "Regional lymph nodes: met carcinoma in 18 of

43 lymph nodes. Pathologic stage (AJCC/UICC 6th edition): pT3, V2, pN2, pMx. See comment." Path comment: "There are additional macroscopic stellate deposits of carcinoma in the pericolic soft tissue. According to the 6th edition of the AJCC staging manual, these should be designated as "V2," indicating that there is a high likelihood that these represent foci of venous invasion."

Patient underwent excision of an oropharyngeal soft tissue mass revealing plasma cell neoplasm with extensive amyloid deposition. During work-up, bone marrow biopsy also revealed involvement by plasma cell neoplasm, with 5-10% of marrow cellularity. No amyloid seen in bone marrow. Patient was referred for radiation of the oropharyngeal mass. Per medical oncology qualifying best for the diagnosis of solitary extramedullary plasmacytoma with minimal marrow involvement. Decision made for observation by medical oncology in view of “minimal” bone marrow involvement. Question: Is rule M11 correct, and I abstract this case as a plasma cell myeloma, 9732/3, C421?

Patient presents with four bladder tumors, described as "each measuring close to 2 cm." A specimen was taken of only one of the tumors. The tops of the tumors were fulgurated, then vaporized methodically. No obvious tumor or residual was noted on re-inspection.

Pathology revealed papillary urothelial carcinoma, high grade, with no definite invasion identified. Small segments of muscularis propria were present. A comment read..."it is difficult to determine if lamina propria invasion is present due to marked necrosis and tissue fragmentation." Urologist staged this as AJCC cT2a, but based on the pathology findings changed it to cT1. The urologist insists this is invasive.

Patient presents with an abnormal chest x-ray. PET reveals 4.6 cm left lower lobe mass and several additional bilateral nodules measuring up to 1.6 cm. Biopsy was recommended and is positive for metastatic histologically benign smooth muscle neoplasm. ER/PR are positive. Mayo consult on biopsy agrees with histology. The differential diagnosis includes benign metastasizing leiomyoma and low grade leiomyosarcoma. Comment: If these nodules remain small and do not progressively grow would consider this metastasizing leiomyoma. Physicians state bilateral pulmonary metastatic leiomyoma (favored) vs low grade leiomyosarcoma. Tamoxifen was started. Patient has a history of uterine fibroids. Several months later, imaging reveals stable bilateral multi pulmonary nodules and left lower lobe mass but persistent. Surgery was recommended but cancelled due to insurance.

Patient presents with a huge mass in the spleen with direct extension to gastric fundus.

12/1/12 Splenectomy: Macroscopic nodules compatible with diffuse large B-cell lymphoma [9680/3]. Further, in the white pulp there are changes compatible with focus of splenic marginal zone lymphoma [9689/3].

Under the Transformations To section in the Heme DB, splenic marginal zone lymphoma transforms to diffuse large B-cell lymphoma.

Patient presents in 2010 with the history of cutaneous T-cell lymphoma and DLBCL. The patient is stated to have been in remission from the DLBCL. However, a current CT scan of the brain is consistent with central nervous system DLBCL. Cerebrospinal fluid cytology is consistent with DLBCL. The CT scan of the torso showed no lymphadenopathy or suspicious findings.

Does the recently discovered DLBCL disease process in the central nervous system represent a new third primary? Or is this disease recurrence/progression? The patient was referred to a cancer center and there is no additional information available regarding further workup or treatment.

Patient presented with large omental cake and multiple peritoneal implants including implants on the rectosigmoid serosa and right ovary. Path revealed papillary serous adenocarcinoma consistent with peritoneal primary.

Per AJCC Manual, extraovarian peritoneal carcinoma is usually staged with the ovarian staging classification.

We understand that the CS Manual will eventually be revised to include staging for extraovarian peritoneal primaries. In the meantime, how do we use the existing CS scheme for peritoneum to code these cases?

Patient presented with large bulky mediastinal mass. CT showed no pleural effusion. Findings also show non-specific parenchymal lung nodules. Biopsy of mediastinal mass showed malignant B-cell lymphoma of follicle center cell origin. Abdomen /Pelvis CT showed borderline lymph nodes in bifurcation. Clinical diagnosis was probable stage 3 if not 4 lymphoma. Per lymphoma guidelines, if extra-nodal primary site is assigned to the extranodal site if an extra-nodal site and its regional lymph nodes are involved. Would the parenchymal lung nodules be indicative of pulmonary involvement? If so, would primary site be lung? Or, would the parenchymal nodules be stage 4 disease and primary site be assigned to lymph nodes?

Patient presented with hoarseness and palpable neck mass. No palpable adenopathy (per hospital abstract).

02/19/16 Thyroid Ultrasound: Right thyroid lobe with mass, 63X35X44XMM (per hospital abstract).

06/01/16 Right thyroid lobectomy, radical resection right laryngeal tumor (per hospital abstract).

06/01/16 Operative Procedure: Tumor was invading laryngeal soft tissue and cartilage anteriorly and to the right. There may be a small amount of residual tumor invading cartilage although this was not clear (per hospital abstract).

GROSS DESCRIPTION: 1. The specimen is received fresh for intraoperative consultation, labeled with the patient's name and "right thyroid mass." It consists of a 3.0 x 2.2 x 2.0 cm irregular, ragged fragment of tan-red, firm, rubbery soft tissue. The specimen is serially sectioned to reveal a tan-red, gritty cut surface with focal fleshy areas. A touch prep is performed. A representative section is submitted for frozen section analysis in 1FSA. A portion of tissue is submitted for flow cytometry with the accession number MSO-16-1786. The remaining specimen is entirely submitted in 4 additional cassettes (1B-1E). 2. The specimen is received in formalin and is labeled "right thyroid lobe." It consists of a thyroid lobe measuring 4.3 x 4.0 x 1.3 cm and weighing 10.0 g. The external surface is covered by a thin fibrous capsule with a focal area of roughening on the posterior surface. The lobe is inked black posterior, blue anterior and orange isthmus margin. Serial sectioning reveals a red-brown and beefy parenchyma. A definitive nodule is not grossly identified. The entire specimen is serially submitted from superior to inferior in 9 cassettes. 3. The specimen is received in formalin, labeled with the patient's name and "right neck/laryngeal mass." It consists of an irregular, focally nodular red-tan mass measuring 7.0 x 5.5 x 4.0 cm and weighing 54 g. The convex portion of the specimen is mostly encapsulated with focal adherent red-brown striated skeletal muscle. The concave portion of the specimen is focally ragged and disrupted. The convex portion of the specimen is inked black and the concave portion is inked blue. The specimen is serially sectioned to reveal a white-grey to red, granular, gritty cut surface with focal fleshy areas. Representative sections are submitted in 12 cassettes.

Final DX DIAGNOSIS: 1. Right thyroid mass excision Plasma cell tumor /plasmacytoma 3 cm. Tumor cells are positive for kappa and negative for lambda immunostains. Recommend correlation with flow cytometry MSO-16-1786, monoclonal plasma cell population with cytoplasmic kappa positivity. Ki-67 stains 7 percent of cells. Focal stromal hyalinization. Congo red stain for amyloid negative. No thyroidal tissue identified. 2. Right thyroid lobe excision Benign thyroid tissue with focal solid cell nest negative for malignancy. One out of two 1/2 perithyroidal lymph nodes positive for plasma cell tumor. 3. Laryngeal mass excision Plasma cell tumor /plasmacytoma 7 cm involving soft tissue and skeletal muscle. Tumor cells are positive for kappa and negative for lambda immunostains. Ki-67 stains 7 percent of cells. Focal stromal hyalinization and calcification. Congo red stain for amyloid negative

Patient presented to hospital ED and had brain MRI that revealed 3.2 cm space occupying lesion in region of the left CPA and trigeminal vesicle nerve compatible with epidermoid tumor.