Pleural or ascitic fluid should be sent for analysis. An elevated amylase level, usually > 1,000 IU/L, with protein levels over 3.0 g/dL is diagnostic. Serum amylase is often elevated as well, due to enzyme diffusion across the peritoneal or pleural surface. Contrast-enhanced computed tomography and endoscopic retrograde cholangiopancreatography (ERCP) may also assist in diagnosis, with the latter an essential component of treatment.

A diagnosis of peritonitis is based primarily on the clinical manifestations described above. Rigidity (involuntary contraction of the abdominal muscles) is the most specific exam finding for diagnosing peritonitis (+ likelihood ratio: 3.9). If peritonitis is strongly suspected, then surgery is performed without further delay for other investigations. Leukocytosis, hypokalemia, hypernatremia, and acidosis may be present, but they are not specific findings. Abdominal X-rays may reveal dilated, edematous intestines, although such X-rays are mainly useful to look for pneumoperitoneum, an indicator of gastrointestinal perforation. The role of whole-abdomen ultrasound examination is under study and is likely to expand in the future. Computed tomography (CT or CAT scanning) may be useful in differentiating causes of abdominal pain. If reasonable doubt still persists, an exploratory peritoneal lavage or laparoscopy may be performed. In patients with ascites, a diagnosis of peritonitis is made via paracentesis (abdominal tap): More than 250 polymorphonucleate cells per μL is considered diagnostic. In addition, Gram stain is almost always negative, whereas culture of the peritoneal fluid can determine the microorganism responsible and determine their sensitivity to antimicrobial agents.

The production of pancreatic enzymes is suppressed by restricting the patient's oral intake of food patient in conjunction with the use of long-acting somatostatin analogues. The patient's nutrition is maintained by total parenteral nutrition.

This treatment is continued for 2–3 weeks, and the patient is observed for improvement. If no improvement is seen, the patient may receive endoscopic or surgical treatment. If surgical treatment is followed, an ERCP is needed to identify the site of the leak.

Fistulectomy is done in which the involved part of the pancreas is also removed.

In normal conditions, the peritoneum appears greyish and glistening; it becomes dull 2–4 hours after the onset of peritonitis, initially with scarce serous or slightly turbid fluid. Later on, the exudate becomes creamy and evidently suppurative; in dehydrated patients, it also becomes very inspissated. The quantity of accumulated exudate varies widely. It may be spread to the whole peritoneum, or be walled off by the omentum and viscera. Inflammation features infiltration by neutrophils with fibrino-purulent exudation.

Routine complete blood count (CBC), basic metabolic profile, liver enzymes, and coagulation should be performed. Most experts recommend a diagnostic paracentesis be performed if the ascites is new or if the patient with ascites is being admitted to the hospital. The fluid is then reviewed for its gross appearance, protein level, albumin, and cell counts (red and white). Additional tests will be performed if indicated such as microbiological culture, Gram stain and cytopathology.

The "serum-ascites albumin gradient" (SAAG) is probably a better discriminant than older measures (transudate versus exudate) for the causes of ascites. A high gradient (> 1.1 g/dL) indicates the ascites is due to portal hypertension. A low gradient (< 1.1 g/dL) indicates ascites of non-portal hypertensive as a cause.

Ultrasound investigation is often performed prior to attempts to remove fluid from the abdomen. This may reveal the size and shape of the abdominal organs, and Doppler studies may show the direction of flow in the portal vein, as well as detecting Budd-Chiari syndrome (thrombosis of the hepatic vein) and portal vein thrombosis. Additionally, the sonographer can make an estimation of the amount of ascitic fluid, and difficult-to-drain ascites may be drained under ultrasound guidance. An abdominal CT scan is a more accurate alternate to reveal abdominal organ structure and morphology.

Ascites exists in three grades:

- Grade 1: mild, only visible on ultrasound and CT

- Grade 2: detectable with flank bulging and shifting dullness

- Grade 3: directly visible, confirmed with the fluid wave/thrill test

This disease is often discovered during surgery for other conditions, e.g., hernia repair, following which an experienced pathologist can confirm the diagnosis. Advanced stages may present as tumors palpable on the abdomen or distention of the belly ("jelly belly" is sometimes used as a slang term for the condition). Due to the rarity of this disease, it is important to obtain an accurate diagnosis so that appropriate treatment may be obtained from a surgical oncologist who specializes in appendix cancer. Diagnostic tests may include CT scans, examination of tissue samples obtained through laparoscopy, and the evaluation of tumor markers. In most cases a colonoscopy is unsuitable as a diagnostic tool because in most cases appendix cancer invades the abdominal cavity but not the colon (however, spread inside the colon is occasionally reported). PET scans may be used to evaluate high-grade mucinous adenocarcinoma, but this test is not reliable for detecting low-grade tumors because those do not take up the dye which shows up on scans. New MRI procedures are being developed for disease monitoring, but standard MRIs are not typically used as a diagnostic tool. Diagnosis is confirmed through pathology.

On x-rays, gas may be visible in the abdominal cavity. Gas is easily visualized on x-ray while the patient is in an upright position. The perforation can often be visualised using computed tomography. White blood cells are often elevated.

Diagnosis is clinical, based on observation. Biopsy is rarely required.

Given its rarity, there are no established guidelines for the treatment of peritoneal mesothelioma. The modern approach to malignant peritoneal mesothelioma includes cytoreductive surgery, hyperthermic intraperitoneal chemotherapy (HIPEC), intraperitoneal chemotherapy, and intravenous chemotherapy. These are often used in conjunction and in a complementary fashion, and this multifaceted approach has significantly improved outcomes when compared to intravenous chemotherapy alone. For instance, the reported median survival time for patients with stage IV mesothelioma as reported by the American Cancer Society is 12 months; however, with adequate cytoreduction, intraperitoneal, and intravenous chemotherapy combined, some authors report 10-year survival rates projected at nearly 75%.

Multiple factors have been shown to be significant in predicting the outcome and overall survival. Age greater than 60 at surgery, more overall disease burden (defined as a PCI greater than 15), complete cytoreduction (no visible disease), and epitheliod subtype pathology have all been shown to be predictors of both mortality and disease progression. These known predictors notwithstanding, many patients with advanced peritoneal mesothelioma are still surgical candidates, and even patients with the highest possible score on the peritoneal carcinomatosis index (39) can be completely reduced to a PCI of 0 with adequate surgery.

Peritoneal mesothelioma has two clinical types which can be differentiated with the help of CT findings, the "dry" type and the "wet". It is classified as "dry" when there are multiple tiny masses or one dominant localized mass and generally little or no ascites. The "wet" type has widespread small nodules, no dominant mass and a presence of ascites.

If fluid is found, the process of eliminating it is through paracentesis; however the analysis of this fluid has limited diagnostic significance. Normally, a definitive diagnosis may be obtained through tissue biopsy.

A primary hydrocele is described as having the following characteristics:

- Transillumination positive

- Fluctuation positive

- Impulse on coughing negative (positive in congenital hydrocele)

- Reducibility absent

- Testis cannot be palpated separately. (exception - funicular hydrocele, encysted hydrocele)kuth

- Can get above the swelling.

Treatment is variable, both due to its rarity and to its frequently slow-growing nature. Treatment ranges from watchful waiting to debulking and hyperthermic intraperitoneal chemotherapy (HIPEC, also called intraperitoneal hyperthermic chemotherapy, IPHC) with cytoreductive surgery.

Splenic rupture is usually evaluated by FAST ultrasound of the abdomen. Generally this is not specific to splenic injury; however, it is useful to determine the presence of free floating blood in the peritoneum. A diagnostic peritoneal lavage, while not ideal, may be used to evaluate the presence of internal bleeding a person who is hemodynamically unstable. The FAST exam typically serves to evaluate the need to perform a CT. Computed tomography with IV contrast is the preferred imaging study as it can provide high quality images of the full peritoneal cavity.

As differential diagnoses, a subphrenic abscess, bowel interposed between diaphragm and liver (Chilaiditi syndrome), and linear atelectasis at the base of the lungs can simulate free air under the diaphragm on a chest X-ray.

Erythema nodosum is diagnosed clinically. A biopsy can be taken and examined microscopically to confirm an uncertain diagnosis. Microscopic examination usually reveals a neutrophilic infiltrate surrounding capillaries that results in septal thickening, with fibrotic changes in the fat around blood vessels. A characteristic microscopic finding is radial granulomas, well-defined nodular aggregates of histiocytes surrounding a stellate cleft.

Additional evaluation should be performed to determine the underlying cause of erythema nodosum. This may include a full blood count, erythrocyte sedimentation rate (ESR), antistreptolysin-O (ASO) titer and throat culture, urinalysis, intradermal tuberculin test, and a chest x-ray. The ESR is typically high, the C-reactive protein elevated, and the blood showing an increase in white blood cells.

The ESR is initially very high, and falls as the nodules of erythema nodosum. The ASO titer is high in cases associated with a streptococcal throat infection. A chest X-ray should be performed to rule out pulmonary diseases, in particular sarcoidosis and Löfgren syndrome.

Surgical intervention is nearly always required in form of exploratory laparotomy and closure of perforation with peritoneal wash. Occasionally they may be managed laparoscopically.

Conservative treatment including intravenous fluids, antibiotics, nasogastric aspiration and bowel rest is indicated only if the person is nontoxic and clinically stable.

Treatment of Meigs' syndrome consists of thoracentesis and paracentesis to drain off the excess fluid (exudate), and unilateral salpingo-oophorectomy or wedge resection to correct the underlying cause.

American Association for the Surgery of Trauma Organ Injury Scaling: Splenic Injury Grading

Meigs syndrome may mimic other conditions, since it is tumor arising from ovaries, pathology of any organs present in the abdomen may show a similar set of symptoms. Various gynecological disorders of the uterus such as endometrial tumor, sarcoma, leiomyoma (pseudo-Meigs syndrome); fallopian tube disorders such as hydrosalpinx, granulomatous salpingitis, fallopian tube malignancy; ovarian disorders such as serous, mucinous, endometrioid, or clear cell carcinoma, Brenner tumor, granulosa cell tumor, stromal tumor, dysgerminoma, fibroma, or metastatic tumor to the ovary.

Meigs syndrome is characterized by the presence of a benign solid ovarian tumor associated with ascites and right hydrothorax that disappear after tumor removal. Non-gynecological manifestations include:

ascites, portal vein obstruction, inferior vena cava obstruction, hypoproteinaemia, thoracic duct obstruction, tuberculosis, amyloidosis, pancreatitis, ovarian hyperstimulation, pleural effusion transudative, congestive heart failure, metastatic tumors to the peritoneal surfaces, collagen-vascular disease, and cirrhosis of the liver.

These entities must be clinically excluded.

Clinical condition characterized by ovarian mass, ascites, and right-sided pleural effusion.Ovarian malignancy and the

other causes (see “Differential Diagnosis”) of pelvic mass, ascites, and pleural effusion to be considered, History of early satiety,

weight loss with increased abdominal girth, bloating, intermittent abdominal pain, dyspnea, nonproductive cough may help in differentiating potential local factor causing such symptoms.

Most hydroceles appearing in the first year of life seldom require treatment as they resolve without treatment. Hydroceles that persist after the first year or occur later in life require treatment through open operation for removing surgically, as these may have little tendency towards regression. Method of choice is open operation under general or spinal anesthesia, which is sufficient in adults. General anesthesia is the choice in children. Local infiltration anesthesia is not satisfactory because it cannot abolish abdominal pain due to traction on the spermatic cord. If a testicular tumor is suspected, a hydrocele must not be aspirated as malignant cells can be disseminated via the scrotal skin to its lymphatic field. This is excluded clinically by ultrasonography. If a tumor is not present, the hydrocele fluid can be aspirated with a needle and syringe. Clear straw-colored fluid contains mostly albumin and fibrinogen. If the fluid is allowed to drain in a collecting vessel, it does not clot but can be coagulated if small amounts of blood come in contact with the damaged tissue. In long standing cases, hydrocele fluid may be opalescent with cholesterol and may contain crystals of tyrosine and a palpable normal testis confirms the diagnosis; other wise surgical exploration of testis is needed.

The scrotum should be supported post-operatively and ice bags should be placed to soothe pain. Regular changes of surgical dressings, observation of drainage, and looking for other complications may be necessary to prevent re-operation. In cases with presence of one or more complications, open operation with/without Orchidectomy is preferred depending on the complications.

Jaboulay’s procedure

After aspiration of a primary hydrocoele, fluid reaccumulates over the following months and periodic aspiration or operation is needed. For younger patients, operation is usually preferred, whereas the elderly or unfit can have aspirations repeated whenever the hydrocoele becomes uncomfortably large. Sclerotherapy is an alternative; after aspiration, 6% aqueous phenol (10-20 ml) together with 1% lidocaine for analgesia can be injected and this often inhibits reaccumulation. Several treatments may be necessary. Aspiration of the hydrocele contents and injection with sclerosing agents sometimes with Tetracyclines is effective but it can be very painful. These alternative treatments are generally regarded as unsatisfactory treatment because of the high incidence of recurrences and the frequent necessity for repetition of the procedure.

The management of lipodermatosclerosis may include treating venous insufficiency with leg elevation and elastic compression stockings; in some difficult cases, the condition may be improved with the additional use of the fibrinolytic agent, stanozol. Fibrinolytic agents use an enzymatic action to help dissolve blood clots.

Stanozol is injected directly into the affected area, Venous Ablation has also been known to help circulation in patients.

When present, pneumoperitoneum can often be seen on projectional radiography, but small amounts are often missed, and CT scan is nowadays regarded as a criterion standard in the assessment of a pneumoperitoneum. CT can visualize quantities as small as 5 cm³ of air or gas.

Signs that can be seen on projectional radiography are the "double wall sign" (also called "Rigler's sign") and the "football sign".

The "double wall sign" marks the presence of air on both sides of the intestine. However, a false double wall sign can result from two loops of bowel being in contact with one another. The sign is named after Leo George Rigler. It is not the same as Rigler's triad.

The "football sign" is when the abdomen appears as a large oval radiolucency reminiscent of an American football on a supine projectional radiograph. The football sign is most frequently seen in infants with spontaneous or iatrogenic gastric perforation causing pneumoperitoneum. It is also seen in bowel obstruction with secondary perforation, as in Hirschprung disease, midgut volvulus, meconium ileus and intestinal atresia. Iatrogenic causes like endoscopic perforation may also give football sign.

Treatment is directed at the underlying condition and usually surgical.

Surgical decompression can be achieved by opening the abdominal wall and abdominal fascia anterior in order to physically create more space for the abdominal viscera. Once opened, the fascia can be bridged for support and to prevent loss of domain by a variety of medical devices (Bogota bag, artificial bur, and vacuum devices using negative pressure wound therapy ).