Inhibition of lymph node metastasis by CTGF in Notch1 driven malignant transformation of rat liver oval cells

Abstract Background Pulmonary sclerosing pneumocytoma (PSP) is a rare benign tumor. Although lymph node metastasis has been reported, it is still considered benign. No malignant transformation has been reported. This is the first case of malignant transformation of both cuboidal surface cells and stromal round cells. Case presentation A 64-year-old male had been complaining of intermittent hemoptysis several times per day for eight months. Chest computed tomography scan showed parenchymal infiltration with cystic lesion in the right lower lobe accompanied by enlarged right hilar lymph nodes. Lobectomy and systemic lymph node dissection was performed. On grossly pathological examination, the lesion was 50 mm from the bronchial stump. It was a mixture of both cystic and solid components and 30 mm * 20 mm in size with unclear border. Microscopically, the cuboidal surface cells transformed to adenocarcinoma. The stromal round cells also had a malignant transformation. The Ki-67 proliferation index in malignant cuboidal surface cells and stromal round cells were 70 and 55%, respectively. Furthermore, E-cadherin was negative in primary tumor but positive in metastatic lymph node, which suggested that the mesenchymal to epithelial transition may play an important role in lymph node metastasis. Conclusions To our knowledge, we present the first case of malignant transformation of both cuboidal surface cells and stromal round cells in PSP. The process of mesenchymal to epithelial transition may play an important role in lymph node metastasis.

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An Evaluation of Clinical and Histopathological Aspects of Patients with Oral Submucous Fibrosis in the Background of Oral Squamous Cell Carcinoma

BioMed Research International ◽

10.1155/2018/4154165 ◽

2018 ◽

Vol 2018 ◽

pp. 1-7 ◽

Cited By ~ 3

Author(s):

B. S. M. S. Siriwardena ◽

K. L. T. D. Jayawardena ◽

N. H. Senarath ◽

W. M. Tilakaratne

Keyword(s):

Squamous Cell Carcinoma ◽

Lymph Node ◽

Lymph Node Metastasis ◽

Oral Squamous Cell Carcinoma ◽

Cell Carcinoma ◽

Malignant Transformation ◽

Squamous Cell ◽

Oral Submucous Fibrosis ◽

Node Metastasis ◽

Submucous Fibrosis

Background. The behavior and prognosis of oral squamous cell carcinoma (OSCC) is presumably different in patients with oral submucous fibrosis (OSF). The objective of this study was to assess the effects of demographic features, habits, and histopathological features in the transformation of OSF to OSCC. Methods. Data were extracted from the archives and histopathological evaluation and presence of nodal metastasis were recorded. Results. OSF was detected in 130 (48%) out of 273 OSCC patients. The mean age of presentation among OSF-positive patients was 57.7 years, while patients diagnosed only with OSCC had a comparatively higher age, 59.5 years. In the below 50 years of age group, presence of OSF with OSCC was less (40%). In the OSF-positive group, male to female ratio was 3.2:1. The common primary sites were buccal mucosa and tongue in both groups. Betel quid chewing was present in more than 95% of the sample. Betel chewing, smoking, and alcohol consumption were present in 26.15% of OSF-positive patients. Degree of fibrosis was neither associated with the level of histological differentiation of the tumor (p= 0.195) nor associated with the malignant transformation (p =0.373). Lymph node metastasis was not seen in 76.63% and 68.54% of the patients with and without OSF, respectively. Conclusions. High degree of prevalence of OSF was observed among the OSCC patients. There were also a male predilection and younger age at presentation in these patients. However, a significant association was not observed in the degree of fibrosis with malignant transformation or the level of histopathological differentiation of the tumor. Lymph node metastasis also failed to express a significant relationship with the presence of OSF.

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Leiomyosarcoma of the transverse colon with lymph node metastasis and malignant transformation: a case report

Surgical Case Reports ◽

10.1186/s40792-020-00998-4 ◽

2020 ◽

Vol 6 (1) ◽

Author(s):

Tomoya Tago ◽

Shuji Suzuki ◽

Jun Kuroda ◽

Ryutaro Udou ◽

Kiyotaka Nishida ◽

...

Keyword(s):

Smooth Muscle ◽

Lymph Node ◽

Lymph Node Metastasis ◽

Tumor Cells ◽

Malignant Transformation ◽

Transverse Colon ◽

Histopathological Examination ◽

Smooth Muscle Actin ◽

High Power Field ◽

Node Metastasis

Abstract Background The concept of GIST was established in 1998, clearly differentiating between gastrointestinal leiomyosarcoma and GISTs among gastrointestinal mesenchymal tumors. Lymph node metastasis is extremely rare in true gastrointestinal leiomyosarcoma, and there are no reports of malignant transformation from leiomyoma. Case presentation The patient was an old woman who had undergone endoscopic mucosal resection for an Is polyp on the left side of the transverse colon at the age of 73. She was diagnosed with leiomyoma with positive surgical margins. Subsequently, she presented to our institution with a sensation of pressure in the upper abdominal region as a chief complaint at the age of 76 years. Abdominal computed tomography and colorectal endoscopy showed a tumor lesion with invagination of the intestines in the transverse colon, the same site as that of the previously resected leiomyoma. A biopsy suggested a smooth muscle tumor, and we performed partial left transverse colectomy and lymph node dissection under a diagnosis of recurrence and enlargement of the previously incompletely resected leiomyoma. Histopathological examination revealed spindle-shaped tumor cells, and the mitotic activity was 30–40/10 high-power field. Tumor cells were immunohistologically positive for α-smooth muscle actin and h-caldesmon; partially positive for desmin; negative for c-kit, CD34, DOG-1, and the S-100 protein; and showed a Ki-67 labeling index of 70–80%. She was diagnosed with leiomyosarcoma malignantly transformed from leiomyoma. Metastasis was found in 1 of the 14 resected lymph nodes. The patient did not undergo adjuvant chemotherapy, but has survived with no recurrence at 2 years after the surgery. Conclusions We have reported a case of leiomyosarcoma of the transverse colon with lymph node metastasis that was malignantly transformed from a leiomyoma.

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