​Differential Diagnosis of Anal Fistula

Differential Diagnosis of Anal Fistula • Pilonidal sinus • Infected perianal sebaceous cysts • Hidradenitis suppurativa • Bartholin’s gland abscess or sinus


​Differential Diagnosis of Anal Incontinence

Differential Diagnosis of Anal Incontinence • Traumatic: nerve injured in surgery, spinal cord injury, obstetric trauma, sphincter injury • Pediatric: congenital, meningocele, myelomeningocele, spina bifida, after corrective surgery for imperforate anus,


​Differential Diagnosis of Anaphylaxis

Differential Diagnosis of Anaphylaxis •hereditary angioedema, cord urticaria, idiopathic urticaria, mastocytosis, serum sickness, idiopathic capillary leak syndrome, sulfite exposure, scombroid poisoning (tuna, bluefish, mackerel) • Pulmonary: laryngeal e


​Differential Diagnosis of Androgen Excess, Reproductive-Age Woman

Differential Diagnosis of Androgen Excess, Reproductive-Age Woman • Sertoli-Leydig ovarian neoplasm • Pregnancy (luteoma, hyperreactio luteinalis) • Polycystic ovary syndrome • Medications (e.g., anabolizing agents, testosterone, danazol) • Idiopathic • H


​Differential Diagnosis of Aplastic Anemia

Differential Diagnosis of Aplastic Anemia • Severe infection • Hypoplastic myelodysplastic syndrome or hypoplastic acute myeloid leukemia in adults • Hypoplastic acute lymphoblastic leukemia in children • Hypersplenism • Hairy cell leukemia • Bone marrow