Very frequent
- Abnormal pigmentation of the oral mucosa / gingivae
- Autosomal dominant inheritance
- Digestive neoplasm / tumor / carcinoma / cancer
- Macules
- Pigmented naevi / naevus pigmentosus / lentigo
Frequent
- Gastrointestinal bleeding / hemorrhage / hematemesis / melena / rectorrhagia
Occasional
- Abnormal nails colour / leukonychia / melanonychia
- Acute abdominal pain / colic
- Anaemia
- Anus / rectum anomalies
- Bladder and ureter anomalies
- Breast neoplasm / tumor / carcinoma / cancer
- Colon neoplasm / tumor / carcinoma / cancer
- Esophageal neoplasm / tumor / carcinoma / cancer
- Estomach / gastric neoplasm / tumor / carcinoma / cancer
- Extrahepatic biliary tract / gallbladder neoplasm / tumor / carcinoma / cancer
- Head and neck neoplasm / tumor / carcinoma / cancer
- Intestinal obstruction / ileus
- Kidney / renal neoplasm / tumor / carcinoma / cancer
- Lung / bronchopulmonary neoplasm / tumor / carcinoma / cancer
- Mesenteric / intestinal infarction
- Nasal polyposis
- Nausea / vomiting / regurgitation / merycism / hyperemesis
- Neoplasms / tumors
- Nose / nasal sinus neoplasm / tumor / carcinoma / cancer
- Ovary / Fallopian tube neoplasm / tumor / carcinoma / cancer (excl. teratoma / germinoma)
- Pancreatic / pancreas neoplasm / tumor / carcinoma / cancer
- Rectum / rectal neoplasm / tumor / carcinoma / cancer
- Small bowel neoplasm / tumor / carcinoma / cancer
- Testicular / seminal neoplasm / tumor / carcinoma / cancer (excl. teratoma / germinoma)
- Ureteral / urethral / vesical / bladder neoplasm / tumor / carcinoma / cancer
- Uterus / uterine / cervix / endometrium neoplasm / tumor / carcinoma / cancer