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Owing to the advantages of a laparoscopic approach, laparoscopic cholecystectomy (LC) is thought to be the treatment of choice in gallbladder disease, even in cases of suspected malignancy. However, it is difficult to differentiate between cholecystitis and gallbladder carcinoma (GBC). We performed radical hepatectomy in patients with pT2 GBC diagnosed by full-thickness frozen biopsy. A 75-year-old Japanese man presented to our hospital with discomfort in the right upper quadrant of the abdomen. This patient was diagnosed with suspected GBC and was scheduled to undergo LC and intraoperative histological examination. Following the procedure, we made a diagnosis of GBC with negative invasion of the cystic duct stump. We converted the laparoscopic procedure to an open surgery involving wedge liver resection with lymphadenectomy. The patient was discharged from our hospital in remission 14 days following the radical hepatectomy. Histological examination showed that the GBC had invaded the liver (T3a), but there was no lymph node metastasis (N0): stage IIIA. Between April 2009 and September 2018, 580 patients underwent cholecystectomy for gallbladder disease at our hospital. Among these, 8 (1.4%) were suspected to have GBC preoperatively and underwent laparoscopic excisional cholecystectomy. We performed elective surgery in the early stage in two patients and second-look surgery in two patients recently. We were able to perform what we termed a laparoscopic excisional cholecystectomy, involving LC with a full-thickness frozen biopsy, even in situations where intraoperative histological examination was not available. Altogether, laparoscopic excisional cholecystectomy is an effective surgical treatment for suspected early GBC.