<prompt> A case of 12 years old boy presents to you with boggy swelling and easily pluckable hair. What would be the probable diagnosis:Lichen planusTinea capitisEpidermophytosisAlopecia areata  <response>: Ans: b Tinea capitisRef: Roxburg 17th ed. 41Tenia capititis is most commonly caused by Microsporum canis.Second MCC of tenia capitis is trichophyton tonsurans.It is never caused by epidermophyton as it does not involve hair.It presents with localized non-cicatricial alopecia, itching, scaling with or without boggy swelling of scalp easily pluckable hair.Tenia capitis is diagnosed by potassium hydroxide KOH wet mounts of hair scale.Treatment: Griseofulvin is DOC 