Medullary Carcinoma of the Gastrointestinal Tract: Report on Two Cases with Immunohistochemical and Molecular Features

Medullary carcinoma of the colon is a rare histological variant characterized by a poorly differentiated morphology, an aberrant immunophenotype, and microsatellite instability. Despite the lack of glandular differentiation, medullary carcinoma is reported to have a good prognosis. It is typically located in the right colon and frequently affects older women. Due to its clinical, histological, biological, and genetic peculiarity, medullary carcinoma requires an accurate diagnosis and the awareness of this diagnostic possibility. We describe the morphological, immunohistochemical, and molecular findings of two interesting cases, the first one in the right colon of a patient and the second one in the terminal ileum of a patient with Crohn’s disease. Deeper knowledge of all the biological and clinical features will allow appropriate and specific treatment of this tumor in the future.

Primary squamous cell carcinoma of the sigmoid colon: a case report and literature review

Primary squamous cell carcinoma of the colon is extremely rare. The etiology is poorly understood, and currently, there are different hypotheses about the origin of this malignant neoplasm. Here, we r 87-year-old male with a moderately-differentiated nonkeratinizing squamous cell carcinoma of the colon.

Primary Cecal Squamous Cell Carcinoma: A Case Report of a Rare Tumor with Poor Prognosis

Squamous cell carcinoma of the colon is a rare tumor and primary cecal localization is unusual. This malignant condition is marked by a worst prognosis due to early local invasion. We report a case of a 46-year-old female patient admitted to the emergency department with symptoms of peritonitis. CT scan showed a cecal tumor perforated in the retroperitoneal space. The patient underwent right hemicolectomy with D2 lymphadenectomy without intestinal anastomosis. The diagnosis of squamous cell carcinoma was confirmed by histopathological examination. Squamous cell carcinoma is a malignant tumor with poor prognosis, hence, the interest of early diagnosis and management.

ANTERIOR ABDOMINAL WALL ABSCESS A RARE PRESENTATION OF LEFT SIDED COLONIC CARCINOMA: A DIAGNOSTIC CHALLENGE FOR A GENERAL SURGEON

Background: The various presentations of carcinoma of the colon are well known. Abscess formation occurs in 0.3 to 0.4% and is the second most common complication of perforated lesions. Perforation and penetration of adjacent organs with intra-abdominal abscess formation as the initial presentation is uncommon. It is difcult to make an accurate diagnosis of abscess formation as the rst evidence of colonic carcinoma preoperatively. A 68 yrs old female who presented to the ED with acute onset of left lower abdominal f Case presentation: ullness, pain and local redness for 15 days. She denied any history of vomiting, fever, anorexia but history of altered bowel habit. Clinically she had a palpable lump (20 x15) cm in left lumber region .The lump was parietal with local raise of temperature , redness and tenderness can be elicited . So our initial impression was parietal wall abscess and we underwent emergency drainage of abscess. She had uneventful recovery and discharged after 2 weeks. She was admitted with similar presentation in previous location 30 days after discharge. Now we investigate thoroughly, a CECT scan of whole abdomen which conrms radio-logically as carcinoma of descending colon with abscess extending into the parietal wall .We underwent an exploratory laparotomy and HPE proven as adenocarcinoma of the colon. Post op she developed SSI which was managed with regular dressing and she was discharged in post-op day 20. We report this case because of an unusual Conclusion: presentation of left sided colonic Ca. The accurate preoperative diagnosis of these conditions extremely complicated because of the fuzzy clinical presentation. The CT scan can diagnose malignancy pre-operatively, even if the denitive diagnosis of colonic perforated neoplasia may be evident only during surgery. So early diagnosis and prompted intervention can save the patient to developed sepsis and to reduce signicantly the morbidity and mortality. The importance is to focus on the differential diagnosis and keep in mind that a colon carcinoma can present with abdominal abscess. Surgeons should be aware of this differential because it is easily ignored pre-operatively.

Metastatic squamous cell carcinoma of the colon: a conundrum in colorectal malignancies

Small-cell carcinoma of the colon is an extremely rare tumour, with poorly understood pathogenesis and unestablished treatment guidelines. The first case was documented in 1919, and only about 100 cases of this condition have been reported to this date. In this case report, we present a case of sigmoid squamous cell carcinoma that eventually led to bowel perforation and was diagnosed on histopathology after emergent surgical intervention. Additionally, we also review the incidence, epidemiology, pathogenesis, immunohistological markers, neogenomics and therapeutic strategies for the same.