Vasilios M. Penopoulos

Inflammatory Cloacogenic Polyp of the Anus.

Giant Anal Fibroma.

Anterior Anal Sphincter Repair.

Carcinoid Tumor of the Appendix.

Subhepatic Appendicitis.

Mucocoele of the Vermiform Appendix.

Pseudomyxoma Peritonei.

Surgical Management of Neuroendocrine Tumors of the Appendix.

Appendiceal Diverticulitis.

Beçhet's Disease : A rare cause of Toxic Megacolon.

Wegener's Granulomatosis presenting as a Perirectal Abscess.

Spontaneous Gastric Fistula - Bone Marrow Transplantation .

Axillary Ectopic Breast Tissue with Gynecomastia.

Male Breast Cancer.

Synchronous Noninvasive Ductal Breast Adenocarcinoma and Follicular Lymphoma.

Breast Sarcoidosis mimicking Lymphoma relapse.

Diabetic Mastopathy in a Patient with Type II Diabetes Mellitus.

Gestational Gigantomastia complicating Pregnancy.

Synchronous Bilateral Breast Cancers.

Giant Megacolon causing Acute Pseudo-obstruction of the Colon.

Large Cell Neuroendocrine-Adenocarcinoma Mixed Tumour of Colon.

Quadruple Synchronous Rectal Adenocarcinomas.

Bone Marrow Disseminated Carcinomatosis originating from Ascending Colon Carcinoma.

Perforation of Cecal Adenocarcinoma due to Left Colon Diverticular Stenosis.

Steroid induced Sigmoid Diverticular Abscess Perforation.

Sister Mary Joseph's nodule caused by Transverse Colon Carcinoma..

Recurrent Epiploic Appendagitis Mimicking Appendicitis and Diverticulitis.

Caecal NECs.

Stenoses in Patients with Ulcerative Colitis.

Spontaneous Perforation of Sigmoid Colon.

Partial Ischemic Necrosis of the Cecum.

Synchronous Necrotizing Typhlitis and Ano-Rectal "Typhlitis" in an Immunocompromised patient.

Giant Rectal Villous Adenoma Recurrence.

Obstruction of the Ileocecal Valve due to a large Cecal Lipoma in a patient with Sigmoid Colon Cancer.

Adult Type Hirschprung's Disease.

Kraske Procedure to cope with Low Rectal Adenomas of doubtful malignancy.

Diverticulitis of End Colostomy.

Squamous Cell Carcinoma arising from a Giant Condyloma Acuminatum ( Buschke-Lowenstein tumor ).

Ischaemic Colitis following Acute Myocardial Infarction.

Extraluminal Perirectal Pseudomucocele following Hartmann's operation.

Rectal Perforation following Stapled Hemorrhoidopexy.

Pseudo-obstruction of a pitch-black Colon.

Bilateral Mucotomy for Rectal Stenosis following Stapled Haemorrhoidectomy.

Cecal Volvulus.

Late Endorectal Mesh Migration following Rectopexy.

Metachronous Ovarian Metastasis in a patient with Primary Colorectal Cancer.

MALT( Mucosa Associated Lymphoid Tissue ) Lymphoma of the Cecum.

Chronically Bleeding Bilateral Diverticulosis.

Cecal Perforation due to Impacted Coprolith.

Management of Βleeding Varices of the Αnorectal region in a patient with Portal Hypertension due to Liver Cirrhosis.

Spontaneous Extraperitoneal Rectal Rupture.

Perforated Diverticulum of the Ascending Colon mimicking Desmoid Tumor.

Ulcerative Colitis and Descending Colon Adenocarcinoma with Metastasis to the Appendix.

Cecal Carcinoma following autologous transplantation for Multiple Myeloma.

Isolated Non Solitary Rectal Bleeding Ulcers.

Synchronous Colonic Adenocarcinomas and Colonic Hydatidosis.

Pneumorrhachis following Rectal Injury.

Well Differentiated Grade - 3 Neuroendocrine Tumor of the Cecum.

Giant Villous Adenoma - McKittrick-Wheelock Syndrome.

Colorectal Stricture in Ulcerative Colitis

Colosplenic Fistula as the presenting manifestation of Colonic Carcinoma.

Solitary Lymphatic cyst of the splenic colonic flexure mimicking tumor.

Synchronous Ovarian Psammocarcinoma and perforated Rectal Carcinoma.

Non-Obstructive Ischemic Colitis.

Chronic Diverticulitis causing Salpingo-Ovarian Abscess and Utero-Colonic Fistula.

Idiopathic Rectal Varices.

Deep Cystic Colitis.

Unusual presentation of Midgut Malrotation in Adulthood after Blunt Abdominal Trauma.

Incidental discovery of Midgut Malrotation during Exploratory Laparotomy.

Abdominal Separation.

Left-Sided Gallbladder.

Total Aganglionosis of the Colon with extension to the Terminal Ileum - Adult Hirschsprung’s Disease.

Peristomal Pyoderma Gangrenosum.

Retrorectal Epidermoid Cyst.

Diaphragmatic Eventration presenting as a "Recurrent Diaphragmatic Hernia".

Adults' Bochdalek's Hernia presenting with Hematemesis and Pancreatitis.

Small Βowel Οbstruction caused by Μetastatic Urothelial Carcinoma of the Urinary Bladder.

Duodenal Metastasis of Aggresive Melanoma.

Ampullectomy for Tumors of Ampulla of Vater.

NeuroEndocrine Carcinoma of Ampulla of Vater.

Inflammatory Fibrous Duodenal Polyp.

Late Duodenal Stump recurrence following previous Subtotal Gastrectomy.

Critical Ilness Related Corticosteroid Insufficiency in Surgical Patients.

Transformation of Adrenal Incidentaloma into Carcinoma.

Hürthle Cell Thyroid Carcinoma.

Encapsulated Medullary Thyroid Microcarcinoma.

Cystic Phaeochromocytomas.

Concurrent Papillary Thyroid Carcinoma and Parathyroid Adenoma.

Parathyroid Gland Carcinoma.

Double Water-Clear cell Parathyroid Adenomas.

Poorly Differentiated Thyroid Carcinoma.

Synchronous De Quervain's thyroiditis and Parathyroid Adenoma.

Internal Spread of Papillary Thyroid Carcinoma.

Total Parathyroidectomy with or without autotransplantation in the sternocleidomastoid muscle.

Overly Descended Parathyroid Adenoma.

Chronic Parathyroiditis

Secondary Papillary Thyroid Carcinoma following Allogeneic Bone Marrow Transplantation.

Ectopic Parathyroid Adenoma within the Carotid Sheath.

Primary Adrenal Leiomyosarcoma.

Retrosternal Goiter.

Synchronous Papillary and Follicular Thyroid Carcinomas.

Synchronous Primary Thyroid and Kidney Cancers.

Cystic functioning Parathyroid Adenoma in a patient with Primary Hyperparathyroidism and Negative Sestamibi Scan.

Chronic Parathyroiditis manifesting from Hypocalcemia to Severe Hypercalcemia.

Silent Pheochromocytoma.

Thyroid Varices.

Atypical Parathyroid Adenoma.

Giant Parathyroid Adenoma.

Contemporary Malignant Thyroid Neoplasms - Papillary and Medullary.

Cystic Parathyroid Adenomas.

Spontaneous Adrenal Haemorrhage.

Thymic Neuroendocrine Carcinoma.

Papillary Thyroid Carcinoma following Postpartum Thyroiditis.

Ectopic Thyroid mimicking a Cyst of Thyroglossal Duct.

Diffuse Sclerosing Variant of Papillary Thyroid Carcinoma.

Riedel's Thyroiditis.

Parathyroid Adenoma arising within the Sternocleidomastoid Muscle.

Pendred Syndrome associated with Retrosternal Goiter.

Functional Parathyroid Cyst.

Primary Adenosquamous Carcinoma of the Esophagus.

Esophageal Perforation afterTEVAR for Thoracic Aorta Rupture.

The use of Sternocleidomastoid Muscle Flap for Esophageal Fistula Repair.

Delayed Presentation of Esophageal Pseudodiverticulum following Sternocleidomastoid Muscle Repair of Esophageal Fistula.

Solitary Esophagial Fibroma presenting with progressive Dysphagia.

Achalasia of the Esophagus in Elderly Patients.Two Types of Achalasia in the same patient.

Giant Vulvar Lipoma.

Spermatic Cord Metastasis.

Torsion of Ectopic Undescended Testis.

Primary Ovarian Adenocarcinoma with synchronous Colonic and Ileal Metastases.

Sebaceous Glands of the Exocervix.

Intestinal Perforation caused by a Quail Bone.

Left Total Nephrectomy and excision of an infected Hepatic Cyst in a patient with Polycystic Liver-Kidney Disease and Gastric Adenocarcinoma.Potter type III. .

Second Branchial Cleft Cyst in an adult patient.

Thyroglossal Duct Cyst.

Primary Melanoma of the Nose.

Adenosquamous Carcinoma arising in a Thyroglossal Duct Cyst.

Chronic Sialadenitis and Hodgkin's Parotid Lymphoma.

Paraplegia: An unusual presentation of Follicular Lymphoma.

Spontaneous Sternal Fracture.

Simultaneous detection of B-Cell CLL and Colonic Adenocarcinoma.

Ileal Maltoma.

Splenectomy for the Management of Primary Myelofibrosis.

Primary Testicular Lymphoma.

Coexistence of Hairy Cell Leukemia, T cell lymphoma and Colonic Adenocarcinoma.

Marginal Zone Lymphoma of the Spleen.

Bilateral Rectus Sheath Hematomas following administration of Low-Molecular-Weight Heparin.

Idiopathic Spontaneous Intraperitoneal Hemorrhage.

Dumbbell Cholecystitis.

Surgical Management of Polypoid Lesions of the Gallbladder.

Cholecystogastric Fistula.

Cholecystocolic Fistula.

HAemorrhage of A Simple Hepatic Cyst.

Hilar Inflammatory Myofibroblastic Tumor following Laparoscopic Cholecystectomy.

Gallbladder Agenesis.

Congenital Absence of the Cystic Duct.

Luschka's Duct Injuries.

Gallbladder Diverticulosis.

Occult Gallbladder Carcinoma presenting as a Primary Ovarian Tumor.

Spontaneous Perforation of Common Bile Duct.

Solitary Cystic Dilatation of Intrahepatic Biliary Duct.

Bile Cast Nephropathy in patients with Obstructing Jaundice.

Spiegelian Hernia.

Non Traumatic Trans-Diaphragmatic Intercostal Hernia.

Prevascular Femoral Hernia .

Giant Inguinoscrotal Hernia.

Lumbar Hernia: A Rare Entity.

Toxic Megacolon associated Clostridium Difficile Colitis.

Abscess of the Round Ligament of the Liver due to Acute Obstructive Suppurative Cholangitis and Septic Thrombosis of the Left Branch of the Portal Vein

Intra-abdominal Abscesses attributed to Streptococcus Oralis.

Small Bowel Spontaneous Perforation in a HIV positive patient.

Fulminant Clostridium Difficile Enteritis after Restorative Proctcolectomy.

Gastrocolic Fistula in Crohn's Disease.

Indeterminate Colitis.

Endometriomas mimicking Abdominal Wall Soft Tissue Tumors.

Vaginal Stump Mesh Erosion following Sacrocolpopexy.

Novel Management of Chylous Ascites following Laparoscopic Nissen Fundoplication.

Liver Abscesses following Pancreaticoduodenectomy.

Solitary Fibrous Tumor of the Liver.

Primary Gastrointestinal Stromal Tumor (GIST) of the Liver.

Extended Right Hepatic Trisegmentectomy with Preservation of the Right Inferior Hepatic Vein.

Left Portal Hypertension.

Hepatic Lymphorrhea following Total Pancreatectomy.

Primary Mesenteric Neuroendocrine Tumor.

Spontaneous Mesenteric Haematoma.

Giant Mesenteric Cyst.

Paraganglioma at the Root of the Mesentery.

Mesenteric Panniculitis as an incidental finding.

Primary multiple Mesenteric - Mesocolic - Retroperitoneal Liposarcomas.

Metastasis of Pancreatic Cancer to the Microenvironment of Lung Cancer.

Metachronous presentation of NET in a splenectomized patient for Littoral Cell Hemangioma of the Spleen.

Multiple Muscular Metastases (Psoas Muscle) from Clear Cell Renal Carcinoma following Radical Nephroureterectomy.

Late Metastases to Skeletal Muscles and Umbilicus following R0 resection of Type I Cholangiocarcinoma.

Metachronous Metastasis to Ileostomy.

Sigmoid Colon Adenocarcinoma with metachronous Tonsillar Metastasis.

Mesothelial Pelvic Cyst.

Brenner Tumor of the Ovary - An Incidental Finding.

Bilateral Giant Ovarian Cystadenomas.

Ovarian Teratoma mimicking Acute Suppurative Appendicitis.

Borderline Ovarian Tumor.

Huge Pancreatic Undifferentiated Carcinoma with Osteoclast-like Giant Cells.

Pseudo-Tumor of the Pancreas.

Posterior Reversible Encephalopathy Syndrome following Surgery for Necrotic Pancreatitis.

Total Pancreatectomy and Cardiac Arrest Episode.

Modified Whipple's Procedure in a patient with Stented Abdominal Aortic Aneurysm.

Simultaneous Management of Hepatic and Pulmonary Hydatidosis.

Retro-Rectal Schwannoma ("Ancient Degenerative Variant").

Presacral Cystic Schwannoma.

Peritoneal Carcinomatosis due to Gastrointestinal Malignancies.

Extraovarian Primary Peritoneal Carcinomatosis.

Postoperative Thrombotic Thrombocytopenic Purpura following Restorative Proctocolectomy.

Acute Postoperative Thrombotic Thrombocytopenic Purpura following Total Colectomy for Ulcerative Colitis.

Adult Diaphragmatic Eventration : Is Plication necessary.

Marfan Syndrome and Acute Abdomen.

Dermatopathic Lymphadenopathy in the absence of clinical Skin Disease.

Holt Oram Syndrome and Crohn's Disease.

Calciphylaxis in a Pre Dialysis patient.

Rhabdomyolysis.

Acute intussusception due to polyp with Malignant Transformation in a patient with Peutz Jeghers Syndrome.

Malignant Transformation of a Polyp in a patient with Peutz-Jeghers Syndrome.

Boerhaave Syndrome.

Fluminant Bleeding in a Neurofibromatosis patient with multiple Jejunal GIST Tumors.

Abdominal Cocoon Syndrome.

Pulmonary Tumor Thrombotic Microangiopathy Following Gastrectomy for Gastric Adenocarcinoma.

Segmental Lateral Overgrowth in a patient with Abscessed Pilonidal Cyst.

Ogilvie Syndrome - Chilaiditi Syndrome. An odd connection.

Mesenteric inflammatory veno-occlusive disease in a patient with primary Sjogren's syndrome

Sweet's Syndrome in a patient with Recto-colic Carcinoma.

Migrated Abdominal Drain Intragastrically following modified Whipple's Operation.

Primary Retroperitoneal Carcinoma from Transitional Cells.

Retroperitoneal Leiomyoma.

Sizeable Solitary Retroperitoneal Hydatid (Echinococcal) Cyst.

Polyarteritis Nodosa presenting as Acute Abdomen.

Non-Hodgkin's Lymphoma in a Psoriatic patient treated with Humira.

Low grade Fibromyxoid Sarcoma Medial Vastus Left Thigh mimicking Lipoma.

Adult Colo-colic Intussusception secondary to Undifferentiated Sarcoma.

Primary Retroperitoneal Angiosarcoma.

Superficial/Subcutaneous Leiomyosarcoma of the Left Shoulder.

Non AIDS Kaposi's Sarcoma leading to Lower Extremities Wounds.

Recurrence of Sacral Chordoma.

Proximal-Type Epithelioid Sarcoma.

Retrorectal Sarcoma.

Incidental Perianal Squamous Cell Carcinoma.

Huge Hibernoma mimicking Liposarcoma.

Gluteal Muscle Lymphoma Mimicking Soft Tissue Sarcoma.

Dermatofibrosarcoma Protuberans.

Intramuscular Myxoma.

Hidradenitis Suppurativa - Medical or Surgical Treatment?

Anal Epidermoid Cyst.

Sebaceous Gland Adenocarcinoma.

Giant Vulvar Epidermoid Cyst.

Amelanotic Malignant Melanoma presenting as a Keloid.

Giant Cutaneous Papilloma on the Lumbar Region.

Ileal Lymphoid Nodular Hyperplasia

Rapidly Progressive Metastatic Epithelioid Angiosarcoma of the Small and Large Bowel.

Ileal Ulcers due to NSAIDs Ingastion causing massive Bleeding.

Small Bowel Obstruction by Phytobezoar in a patient with "virgin" Abdomen.

Progressive Sclerosing Encapsulating Peritonitis.

Resection of Small Intestinal Neuroendocrine Tumors should be combined with Radical Regional Lymphadenectomy to improve survival.

Pneumatosis Cystoides Intestinalis.

Jejunogastric Intussusception.

Stromal Endometriosis of the Small Intestine.

Pseudo-Pneumoperitoneum due to chronically inflammed and distended ileal pouch.

Intestinal Stromal Endometriosis.

Small Bowel Vascular Tumor presenting with Intermittent Bleeding and Intussusception.

Primary Jejunal Adenocarcinoma unrelated to previously resected twice Rectal Carcinomas.

Distal Intestinal Obstruction Syndrome in adults with Cystic Fibrosis.

Ileal Pouch Carcinoma .

Non-steroidal anti-inflammatory drug-induced Diaphragm Disease presenting as Small Bowel Obstruction.

Spontaneous Splenic Rupture.

Splenectomy for the Treatment of Splenomegaly and Fever of unknowh origin.

Primary Angiosarcoma of the Spleen presenting as Idiopathic Thrombocytopenic Purpura.

Autotransplantation of the Spleen when Splenectomy becomes inevitable.

Giant Non Parasitic Splenic Cyst.

Wandering Spleen.

Littoral Cell Angioma of the Spleen.

Gastrostomy Foley Tube dislodgment causing Jejunal Obstruction.

Acute Mesentero - Axial Gastric Volvulus in a patient with Diaphragmatic Hernia.

Gastrointestinal Bleeding from Dieulafoy's Lesion.

A Signet Ring Cell Gastric Carcinoma presented as Refractory Acquired Thrombotic Thrombocytopenic Purpura.

Late Gastroparesis following Gastrectomy and Adjuvant Radiotherapy.

Gastric Emphysema following Vomiting.

Completion Gastrectomy for Post-Gastrectomy Gastroparesis Syndrome (PGGS).

Gastric Outlet obstruction induced Pneumobilia.

Chronic Gastric Volvulus.

Hypoganglionosis of the Stomach resulting in persistent Gastroparesis.

Post-emetic Expulsion of Esophageal Metal Stent.

Perforated Early Gastric Carcinoma.

Multiple Stromal Tumors of the Stomach.

Spontaneous Malignant Metastatic Gastric Perforation.

Synchronous Gastric Adenocarcinoma and Neuroendocrine Carcinoma mimicking Double MANECs.

Esophageal Burns following ingestion of Caustic Substances.

Gastrobronchial fistula following removal of Adjustable Gastric Banding.

Synchronous Colonic and Adrenal Tumors.

Synchronous Occurrence of Appendiceal Mucinous Neoplasm and Colonic Adenocarcinoma.

Traumatic Displacement of the Testis.

Acquired Cystic Kidney Disease-associated Renal Cell Carcinoma.

Premature Metastasis of Renal Cell Carcinoma.

Bilateral Long Ureteral Strictures following Short Term Preoperative Radiotherapy for Rectal Carcinoma.

Spontaneous Rupture of the Urinary Bladder.

Distant Metachronous Ureteral Metastasis.

Renal Oncocytoma.

Ureteral Varices.

Superior Mesenteric Artery Syndrome ( Wiklie Syndrome ).

Primary Aorto -Duodenal Fistula.

Ischemic Intestinal involvement in a patient with Buerger's Disease

Spleno-Renal Shunt to tackle Idiopathic Portal Hypertension.

Ischemic Colitis in a Teenager with Spina Bifida.

Spontaneous Idiopathic Rupture of Splenic Artery Aneurysm.

Right Hepatic Artery Syndrome.

Mesenteric Inflammatory Veno Occlusive Disease in a Patient with Primary Sjögren's Syndrome.

Thrombosis of the Celiacomesenteric Trunk.

Primary Leiomyosarcoma of the Great Saphenous Vein.

Simultaneous Thrombosis of the Celiac Artery (Haller's Tripod) and Superior Mesenteric Artery.

Rupture of Common Hepatic Artery Pseudoameurysm following Acute Idiopathic Pancreatitis.

Portomesenteric Axis Thrombosis following Sleeve Gastrectomy.

Rupture of Riolan's Arc Pseudoaneurysm following endovascular repair of AAA.

Isolated Varicosis of the Small Intestine without Portal Hypertension.

Finger Varicosities.

Traumatic Renal Rupture.