Cholecystogastric fistula is one of the rarest and most life-threatening complications of gallbladder stone disease. This disease can mimic other diseases such as perforated peptic ulcers and is too hard to be diagnosed preoperatively. It should be considered a significant differential diagnosis in patients with abdominal pain and cholecystitis symptoms.

Although Gallbladder cancer is rare, it is the most common type of biliary tract cancer that could mimic acute cholecystitis symptoms. As it is a poor prognostic and life-threatening condition, diagnosing and treating it as soon as possible is essential.

Mature ovarian Cystic teratoma or dermoid cyst is one of the most common benign ovarian neoplasms that can be found in different age groups and in various sizes. It is important to diagnose and treat this problem as soon as possible because of its complications especially malignancy transformation.

Acute abdomen is a life-threatening condition caused by different incidences such as perforated peptic ulcers and acute appendicitis. This critical condition needs urgent investigation and treatment. The main diagnostic ways for acute pancreatitis are clinical examination and findings. It is essential to consider these two conditions in a patient simultaneously.

Concomitant bilateral direct, indirect, and femoral inguinal hernia is a rare condition that can lead to complications such as incarceration, strangulation, and postoperative recurrence. So, it is important to choose the most useful diagnostic and treatment way.

Appendiceal diverticulitis is a rare condition that can mimic other diseases' symptoms or cause different symptoms because of its various complications. However, one of the most frequent complications of this disease is perforation, leading to other serious problems such as peritonitis. This complication can threaten a patient's health condition.

Incomplete obliteration of urachus during the fetal period can lead to urachal abnormalities, such as urachal sinus. Therefore, it should be considered as a significant differential diagnosis in abdominal pain or umbilical discharge patients. This article presents a young patient with a urachal sinus mimicking umbilical pilonidal sinus symptoms.