Long-term Clinical Course of Amniotic Membrane after Permanent Amniotic Membrane Transplantation

Purpose@#To investigate the long-term clinical outcomes of transplanted amniotic membrane in patients who underwent permanent amniotic membrane transplantation (P-AMT) on cornea. @*Methods@#From April 2014 to March 2021, medical records and digital photographs of 68 patients (72 eyes) who underwent P-AMT were analyzed retrospectively. The duration of complete re-epithelization of cornea and wearing therapeutic contact lense (T-lens) after surgery were investigated, the size of preserved amniotic membrane (AM) excluding the melted portion was analyzed using the Image J program every year up to 6 years after surgery, and it was compared by dividing into a single-layer group and a double-layer group. In addition, when the AM melts, the cause, time, and related factors of melting were analyzed. @*Results@#The average duration to complete re-epithelialization after surgery was 12.2 ± 11.0 days, and T-lens were worn on average up to 8.7 ± 8.5 months after surgery. In total group, the average ratio of preserved AM annually up to 6 years after surgery was 94.9%, 94.3%, 97.8%, 96.4%, 95.8%, 91.6% respectively, and there was no significant difference between the single-layer group and the double-layer group. AM melting appeared in 38.9% (28 eyes) of the total group, and melting was first observed on average 16.4 ± 17.2 months after surgery. The formation and rupture of bullae was the most common cause of melting at 71.4% (20 eyes), and there were no statistically significant related factors involved in the formation of bullae. @*Conclusions@#In the case of P-AMT performed in various diseases of the cornea, the transplanted AM is partially melt but considered to be well preserved up to 6 years after surgery to form a stable ocular surface.

A Case of Primary Extracranial Meningioma in the Maxillary Sinus / 대한이비인후과학회지

Meningioma is one of the most common tumors of the central nervous system. However, primary extra cranial meningioma is rare as it consists 1%-2% of meningioma. It is very rare in paranasal sinus and accounts for about 0.1% of the paranasal sinus tumor. The treatment of choice is complete surgical excision of the tumor. Herein, with a review of the literature, we report a rare case of primary extra cranial meningioma in a 38-year-old male.

A Case of Plasma Cell Mucositis Arising From the Larynx

Plasma cell mucositis is a very rare benign disease characterized by dense lymphoplasmacytic infiltration in the submucosa layer. It appears as a reddish ulcer on the mucous membrane or as a cobblestone or nodular mass on the affected mucosa. When it involves the pharynx or larynx, the patient presents with dysphagia, voice change and dyspnea. Clinically, it is important to differentiate with malignant diseases such as extramedullary plasmacytoma, amyloidosis and sarcodosis. Several cases of mucositis in the larynx have been reported in English literature, but none have been reported in Korea. We report a case of plasma cell mucositis in the larynx with a review of literature.

A Case of Small Cell Carcinoma Originated from Sphenoid Sinus in Patient with Recurrent Pituitary Tumor

Small cell carcinoma (SmCC) is a type of neuroendocrine tumor commonly originating in the lung, with only about 2-4% of cases arising at extrapulmonary sites. Extrapulmonary SmCC of the head and neck has a poor prognosis and a high rate of distant metastasis. The paranasal sinus is a rare location for extrapulmonary SmCC and only a few related papers have been published to date. We report a rare case of SmCC originating from the sphenoid sinus in a patient with a recurrent pituitary tumor with a literature review.

A Case of Plasma Cell Mucositis Arising From the Larynx

Plasma cell mucositis is a very rare benign disease characterized by dense lymphoplasmacytic infiltration in the submucosa layer. It appears as a reddish ulcer on the mucous membrane or as a cobblestone or nodular mass on the affected mucosa. When it involves the pharynx or larynx, the patient presents with dysphagia, voice change and dyspnea. Clinically, it is important to differentiate with malignant diseases such as extramedullary plasmacytoma, amyloidosis and sarcodosis. Several cases of mucositis in the larynx have been reported in English literature, but none have been reported in Korea. We report a case of plasma cell mucositis in the larynx with a review of literature.

A Case of Small Cell Carcinoma Originated from Sphenoid Sinus in Patient with Recurrent Pituitary Tumor

Small cell carcinoma (SmCC) is a type of neuroendocrine tumor commonly originating in the lung, with only about 2-4% of cases arising at extrapulmonary sites. Extrapulmonary SmCC of the head and neck has a poor prognosis and a high rate of distant metastasis. The paranasal sinus is a rare location for extrapulmonary SmCC and only a few related papers have been published to date. We report a rare case of SmCC originating from the sphenoid sinus in a patient with a recurrent pituitary tumor with a literature review.

A Case of the Hamartoma of Middle Ear Presenting with the Aplasia of Ipsilateral Internal Carotid Artery / 대한이비인후과학회지

Hamartoma is a benign congenital tumor made of an abnormal mixture of normal tissues. It is a kind of developmental anomaly, in which the tissues are arranged with an excess growth of one or more of its components. Hamartoma is usually found in the lung, hypothalamus, and colon, but very rarely found in the head and neck areas. Symptoms are caused by the tumor tissue pressing against other tissues or organs. Surgical removal is the treatment modality of choice for hamartomas causing symptoms. The aplasia of unilateral internal carotid artery (ICA) is a rare congenital anomaly. ICA aplasia can cause structural change of the middle ear space. A 5 year-old female patient was presented with large hamartoma in the middle ear and the aplasia of the ipsilateral ICA. The mass was successfully removed without any complications. Authors report this case with a brief literature review.

Inflammatory Myofibroblastic Tumor of the Pancreas: A Case Report and Literature Review

Inflammatory myofibroblastic tumors (IMTs) are rare. They are characterized by myofibroblastic spindle cell proliferation with a varying degree of inflammatory cell infiltration. IMT can occur in any anatomic location but has been reported in the lung, mesentery, and omentum, mainly in children or young adults. It rarely occurs in the pancreas and is often difficult to distinguish from other tumors, including some malignant ones. Therefore, it can be challenging to make a radiological diagnosis of IMT. Here, we present a case of IMT that occurred in the pancreas head of a middle-aged female. The patient’s ultrasonography, computed tomography, and magnetic resonance imaging findings are presented along with a review of the literature.

Inflammatory Myofibroblastic Tumor of the Pancreas: A Case Report and Literature Review

Inflammatory myofibroblastic tumors (IMTs) are rare. They are characterized by myofibroblastic spindle cell proliferation with a varying degree of inflammatory cell infiltration. IMT can occur in any anatomic location but has been reported in the lung, mesentery, and omentum, mainly in children or young adults. It rarely occurs in the pancreas and is often difficult to distinguish from other tumors, including some malignant ones. Therefore, it can be challenging to make a radiological diagnosis of IMT. Here, we present a case of IMT that occurred in the pancreas head of a middle-aged female. The patient’s ultrasonography, computed tomography, and magnetic resonance imaging findings are presented along with a review of the literature.

Influence of Cold Ischemia Time and Storage Period on DNA Quality and Biomarker Research in Biobanked Colorectal Cancer Tissues / 고신대학교의과대학학술지

Objectives@#Biobanking plays an important role in future research. Assessment and control of the preanalytical variables of biobanked tissues are fundamentals for the optimal use of biospecimens. @*Methods@#Forty-five colorectal cancer (CRC) tissues stored at -80℃in Bio-Resource Bank were evaluated to define the influence of cold ischemia time (CIT) and storage period (SP) on DNA quality in biobanked tissues. Three CITs (less than 30 minutes (CIT-1), 30-45 minutes (CIT-2), and 45-60 minutes (CIT-3)) and three SPs (less than 1 year (SP-1), 2-3 years (SP-2), and 4-5 years (SP-3)) were chosen. NanoDrop spectrophotometer was used to determine the 260/280 ratio for DNA purity. DNA integrity was analyzed by a UV transilluminator following electrophoresis on 2% agarose gel. To evaluate the practical usability of DNA for biomarker research, KRAS mutation status was assessed by PCR amplification. @*Results@#All DNA specimens had a 260/280 ratio ranging between 1.8 and 2.0 with the exception of one specimen (CIT- 2/SP-2 group). For DNA integrity, DNA appeared as a compact, high-molecular-weight band with no or scanty low-molecular- weight smears. The concordance of KRAS mutation status between paired biobanked frozen tissues and formalin-fixed paraffin-embedded tissues was 100%. DNA remained stable in CRC tissues kept at room temperature for up to 1 hour and long-term storage up to 5 years. @*Conclusions@#Storage conditions of our biobank are suitable for long-term (at least five years) specimen preservation with high DNA quality. These results have practical implications that could affect banking guidelines.

Distal Ileal Lymphoma Presenting Ileocecal Intussusception with Spontaneous Reduction / 대한소화기학회지

Intussusception is a rare disease in adults. A demonstrable etiology is found in approximately 85% of all cases, and approximately 40% of them are caused by malignant tumors. A 65-year-old patient visited the outpatient department with mild abdominal pain without other symptoms. The initial laboratory test and simple X-ray showed normal findings. CT revealed intussusception in the ileocecal area. The initial colonoscopic biopsy revealed atypical cells. Follow up colonoscopy showed spontaneous reduction of the intussusception. Diffuse large B-cell lymphoma was suspected in the second colonoscopic biopsy. An elective operation was performed. This case reports a case of a spontaneous reduction of adult intussusception with a brief review of literature.

Distal Ileal Lymphoma Presenting Ileocecal Intussusception with Spontaneous Reduction / 대한소화기병학회잡지

Intussusception is a rare disease in adults. A demonstrable etiology is found in approximately 85% of all cases, and approximately 40% of them are caused by malignant tumors. A 65-year-old patient visited the outpatient department with mild abdominal pain without other symptoms. The initial laboratory test and simple X-ray showed normal findings. CT revealed intussusception in the ileocecal area. The initial colonoscopic biopsy revealed atypical cells. Follow up colonoscopy showed spontaneous reduction of the intussusception. Diffuse large B-cell lymphoma was suspected in the second colonoscopic biopsy. An elective operation was performed. This case reports a case of a spontaneous reduction of adult intussusception with a brief review of literature.

A Case of Head and Neck Mucosa-Associated Lymphoid Tissue Lymphoma Presenting as Progressive Multiple Cranial Nerve Palsy / 대한이비인후과학회지

Lymphoma is a malignant tumor arising from the lymphoid tissue. Chronic inflammation can make lymphocyte accumulation and proliferation in the mucous membrane. Sustained accumulation of these persistent changes in the lymphoid tissues may be responsible for the development of mucosa-associated lymphoid tissue (MALT) lymphoma. Although multiple cranial nerve palsy have been reported in various lymphoma, it has never been reported in MALT lymphoma. A 39-year-old man reported of facial palsy and subsequent vocal fold palsy. MALT lymphoma was diagnosed as involving the parotid gland, nasopharynx, and the skull base. Vocal palsy and facial palsy were successfully recovered after chemotherapy.

A Case of Thoracic Extradural Chordoid Meningioma: Focusing on Radiologic Features

Chordoid meningioma, an uncommon subtype of meningioma, occurs rarely in the spine. In this case report, the authors present a case of spinal chordoid meningioma in a young female patient, and include a detailed description of imaging findings and a literature review.

Prognostic Utility of Histological Growth Patterns of Colorectal Lung Oligometastasis

BACKGROUND: Patients with resectable colorectal lung oligometastasis (CLOM) demonstrate a heterogeneous oncological outcome. However, the parameters for predicting tumor aggressiveness have not yet been fully investigated in CLOM. This study was performed to determine the prognostic value of histological growth patterns in patients who underwent surgery for CLOM. METHODS: The study included 92 patients who were diagnosed with CLOM among the first resection cases. CLOMs grow according to three histological patterns: aerogenous, pushing, and desmoplastic patterns. The growth patterns were evaluated on archival hematoxylin and eosin–stained tissue sections. RESULTS: The aerogenous pattern was found in 29.4% (n=27) of patients, the pushing pattern in 34.7% (n=32), the desmoplastic pattern in 6.5% (n=6), and a mix of two growth patterns in 29.4% (n=27). The size of the aerogenous pattern was significantly smaller than that of metastases with other patterns (p=.033). Kaplan-Meier analysis demonstrated that patients showing an aerogenous pattern appeared to have a poorer prognosis, which was calculated from the time of diagnosis of the CLOM (p=.044). The 5-year survival rate from the diagnosis of colorectal cancer tended to be lower in patients with an aerogenous pattern than in those who had a non-aerogenous pattern; however, the difference was marginally significant (p=.051). In the multivariate Cox analysis, the aerogenous pattern appeared as an independent predictor of poor overall survival (hazard ratio, 3.122; 95% confidence interval, 1.196 to 8.145; p=.020). CONCLUSIONS: These results suggest that the growth patterns may play a part as a histology-based prognostic parameter for patients with CLOM.

Clinicopathologic significance of tumor microenvironment CD11c, and FOXP3 expression in diffuse large B-cell lymphoma patients receiving rituximab, cyclophosphamide, anthracycline, vincristine, and prednisone (R-CHOP) combination chemotherapy

BACKGROUND/AIMS: CD11c is a dendritic cell marker in humans, which potentially induces a cytotoxic effect on lymphoma cells. Forkhead boxP3 (FOXP3) is a regulator of T lymphocyte in the microenvironment of the lymphoma. The principal objective of this study was to determine whether the tumors' microenvironment expressions of CD11c and FOXP3 are predictive of clinical outcomes in diffuse large B-cell lymphoma (DLBCL) patients receiving treatment with rituximab, cyclophosphamide, anthracycline, vincristine, and prednisone (R-CHOP) combination chemotherapy. METHODS: The study population consisted of 100 patients with DLBCL. The CD11c and FOXP3 expression in primary tumors' microenvironment were evaluated using an immunohistochemistry (IHC). RESULTS: CD11c and FOXP3 expression positivity in microenvironment were 25% and 35%, respectively. Each one counted for 1 point. In CD11c and FOXP3 stain, positive was counted as 0 and negative was 1. The points were separated into low risk (0 to 1) and high risk (2) groups. Only the extranodal DLBCL patient group analysis conveyed significant differences of progression-free survival (p = 0.019) and overall survival (p = 0.039) between the two groups. CONCLUSIONS: We can achieve possible clinical significance of lymphoma tumor microenvironments through CD11c and FOXP3 IHC stains in extranodal DLBCL patients receiving R-CHOP therapy.

A Case of Cystadenocarcinoma Arising from Parotid Gland / 대한이비인후과학회지

Cystadenocarcinoma, a term established by the 2005 World Health Organization classification system to an entity of cystadenocarcinoma, is a rare malignant neoplasm of the salivary glands. Major locations of this neoplasm are the parotid gland, sublingual gland, and minor salivary glands. We encountered a case of cystadenocarcinoma originating from a parotid gland in a 28-year old man. He received radiation therapy followed by superficial parotidectomy. At 18 months of follow-up, no recurrence is observed. We herein report the case with a review of literature.

Ectomesenchymal Chondromyxoid Tumor in the Anterior Tongue: Case Report of a Unique Tumor

Ectomesenchymal chondromyxoid tumor (ECMT) is a rare tumor, exclusively arising in the anterior tongue. Thirty-eight cases have been reported in the English literature. It usually presents as a sessile protrusion and shows round to spindle cells embedded in myxoid to chondroid stroma. Tumor cells are almost always positive for polyclonal glial fibrillary acidic protein (GFAP). We report our experience in the recent treatment of a case of ECMT, the third case in 3 years. The mass in the anterior tongue revealed characteristic morphologic features of ECMT and the expression of polyclonal GFAP. Although ECMT should be differentiated from other mesenchymal tumors including myoepithelioma, its clinical, morphological, and immunohistochemical features enable its diagnosis, especially when pathologists are aware of it.